#help-with-arduino | adafruit | Page 52

safe shell Mar 4, 2020, 3:17 AM

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What's on the other end? could be an issue with the SAMD_TX-to-Other_RX wire?

terse canopy Mar 4, 2020, 3:17 AM

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(clarification, I don't see anything happen until I try sending 2kb of data back)

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this is over USB serial

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let me send a code snippet and explain what's happening

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fft_buffer.clear();

for (int i = 0; i < FFT_LEN; i++) {
    fft_buffer.add(read_uint16_serial());
}

Serial.println("Computing FFT");

arm_rfft_instance_q15 rfft;
uint32_t fft_len_real = FFT_LEN;
uint32_t ifft_flag_r = 0;
uint32_t bit_reverse_flag = 0;
arm_status fft_init_status = reduced_arm_rfft_init_q15(&rfft, fft_len_real, ifft_flag_r, bit_reverse_flag);

arm_rfft_q15(&rfft, fft_buffer.data, fft_results);

write_int16_array_serial(fft_results, FFT_LEN);

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so read_uint16_serial and write_int16_array_serial are pretty much what you'd expect

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I do my 2kb write

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see the Serial.println() call from the above

surreal pawn Mar 4, 2020, 3:19 AM

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@terse canopy yes, if you want it sent now you should call Serial.flush()

terse canopy Mar 4, 2020, 3:20 AM

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and with my J-Link, I see it hit write_int16_array_serial, dump the 2kb array into Serial.write(), and then keep looping

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does it not get automatically sent after some time period?

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I set a 10 second timeout on the PC end and got zero data back

surreal pawn Mar 4, 2020, 3:21 AM

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the arduino docs don't say anything about automatically flushing on timeout

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you can check the code if you want

terse canopy Mar 4, 2020, 3:21 AM

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I just find it a little ridiculous that my mcu is buffering 2kb of data for serial writes

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and not sending any of it over the wire

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that seems very wrong

surreal pawn Mar 4, 2020, 3:22 AM

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if you're optimizing for serial throughput it would make sense to buffer as much as possible

terse canopy Mar 4, 2020, 3:23 AM

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that doesn't make sense for a USB 1.1 serial device though

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USB specification puts a cap on the packet size

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for 1.1, max packet size is 64 bytes

surreal pawn Mar 4, 2020, 3:25 AM

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probably all of the code involved is on github. If you're sufficiently motivated I'm sure you can find out when this decision was made and why

terse canopy Mar 4, 2020, 3:28 AM

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wow, I can't believe it, Serial.write() apparently does buffer even 2kb of data

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from a USB packet efficiency standpoint that makes no sense

pine bramble Mar 4, 2020, 4:37 AM

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It's probably a 64 byte USART type buffer. I'm guessing the Arduino IDE libs buffer outside of that model.

terse canopy Mar 4, 2020, 4:57 AM

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so, actually, I forgot to mention that I'm using the TinyUSB stack

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and it seems that TinyUSB also buffers only 64 bytes by default

pine bramble Mar 4, 2020, 5:00 AM

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That's what I'm looking at now. I think. I think they changed a lot of things wrt USB since the last time I looked at this (I'm exploring it via the CircuitPython code base, but my guess is the Arduino IDE support followed a similar path).

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https://termbin.com/3125

terse canopy Mar 4, 2020, 5:07 AM

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this might be why

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https://github.com/hathach/tinyusb/commit/33c61bfda2c3aada3cb06d36e12d7cf57da02037

GitHub

comment out cdc flush on write (for now). Since it has issue with c...

…cuitpython

brave cape Mar 4, 2020, 5:12 AM

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Hi people!
So I made this code for my arduino uno that uses an ultrasonic sensor to trigger a light. The ultrasonic sensor works and triggers the light, but when the sensor is not triggered, the light blinks on and off every second. If you think you can help me, please DM me and I can send you the code or photos of the project.
Thanks,

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Sketch

pine bramble Mar 4, 2020, 5:13 AM

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@terse canopy SAMD21 or SAMD51 on your project?

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Hi @brave cape

brave cape Mar 4, 2020, 5:13 AM

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hi

terse canopy Mar 4, 2020, 5:14 AM

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@pine bramble SAMD21, it's a trinket m0

pine bramble Mar 4, 2020, 5:15 AM

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This one didn't make the last termbin because I didn't let ag run long enough. ;)
ports/atmel-samd/asf4/samd21/usb/class/cdc/device/cdcdf_acm.c:314:int32_t cdcdf_acm_read(uint8_t *buf, uint32_t size)

terse canopy Mar 4, 2020, 5:16 AM

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you sure you looking at the right set of functions btw?

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reads are fine

pine bramble Mar 4, 2020, 5:21 AM

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https://github.com/adafruit/asf4/blob/039b5f3bbc3f4ba4421e581db290560d59fef625/samd21/usb_start.c#L35

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Just tracing possible places where this gets specified.

terse canopy Mar 4, 2020, 5:22 AM

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ah

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I'm looking at this right now

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https://github.com/hathach/tinyusb/blob/7b20b80dc0694cfe49b63222f47a8c3d18906e41/src/common/tusb_fifo.h

GitHub

hathach/tinyusb

An open source cross-platform USB stack for embedded system - hathach/tinyusb

#

going to inspect the tx fifo depth and see if it's something bigger than 64

pine bramble Mar 4, 2020, 5:24 AM

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Yeah I really don't know that code base at all. TinyUSB came in after the last time I looked at this.

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The stuff above might very well be the old way of doing it.

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(or it may be leveraged by TinyUSB for all I know)

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I'll try a broader search as I'm guessing the '64' was kept intact.

terse canopy Mar 4, 2020, 5:40 AM

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I think circuitpython uses TinyUSB now, or at least that's what I'd assume (there's a git submodule for it)

pine bramble Mar 4, 2020, 5:46 AM

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The 64ishness:
https://termbin.com/u1sl

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Everything I've stumbled over says control_buffer (however abbreviated) was 64 bytes in length.

terse canopy Mar 4, 2020, 5:51 AM

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(gdb) p _cdcd_itf
$4 = {{itf_num = 0 '\000', ep_notif = 0 '\000', ep_in = 0 '\000', ep_out = 0 '\000', line_state = 0 '\000',
    wanted_char = 255 'ÿ', line_coding = {bit_rate = 9600, stop_bits = 0 '\000', parity = 0 '\000',
      data_bits = 8 '\b'}, rx_ff = {buffer = 0x20002d20 <_cdcd_itf+48> "²\002;\002\210\002Æ\002;\001 ", depth = 256,
      item_size = 1, overwritable = false, count = 0, wr_idx = 0, rd_idx = 0}, tx_ff = {
      buffer = 0x20002e20 <_cdcd_itf+304> "yÿÿ", depth = 256, item_size = 1, overwritable = false, count = 0,
      wr_idx = 0, rd_idx = 0},
    rx_ff_buf = "²\002;\002\210\002Æ\002;\001 \000s\000\000ÿ3ÿOÿAÿ"ÿ\t_\235_AyyOy▌y+ü ûxûSûzûxüSüSû[úDû\016ûöü\220üSûxû-ú¢ú²ú¢úƒúàû[ûkû\036û[ûæü4ûxúÿú¢ûküSüüy:üíü_y▌_P_oyäy:y\033yhy╪üIûöûcûSû\231ûSûxûöü\005ûxûLúÿû\036ûSûxûxûæü¿yä_~_úÿ"\000\000\000M\000S\001\025\002\034\002Z\001I\001\006ÿâÿ(ÿ\000=\000{\000s\000{\000\\\000"...,
    tx_ff_buf = "yÿÿ\000\003\000\nÿoÿ_\000\r\000\022ÿ_\000\001\000\nÿÿÿComputing FFT\r\nÿæ\000\000ÿöÿóÿy\000\002\000\002\000\005ÿy\000\001ÿú\000\004ÿüÿÿ\000\002ÿyÿüÿüÿ_\000\fÿyÿÿÿúÿúÿù\000\003ÿú\000\000ÿûÿy\000\001ÿÿ\000\016\000'ÿ_ÿóÿ_\000\001ÿ÷\000\002ÿ÷ÿÿÿû\000\bÿy\000\000\000\004\000\000\000\006\000\001ÿú\000\003ÿyÿÿÿùÿùÿo\000\001ÿoÿ_ÿyÿÿ\000\aÿ_\000\024\000k\000\006\000\030ÿyÿÿÿÿ\000\004ÿÿÿÿ\000\006ÿùÿü\000\000ÿùÿöÿ"...,
    epout_buf = " Ag{\000\\\000.\000\000ÿ3\000.\001\025\001c\002i\003z\004\n\004\n\004\n\004\n\003û\004)\004+\003û\003p\003\217\003û\004A\005}\005º\005º\005o\005m\005«\006d\006A\006\262",
    epin_buf = "Reality is an illusion\r\n", '\000' <repeats 39 times>}}

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this seems to suggest 256 bytes

pine bramble Mar 4, 2020, 5:52 AM

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0x20002e20 is discoverable. ;) I think.

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rofl epin_buf = "Reality is an illusion

terse canopy Mar 4, 2020, 5:55 AM

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oh yeah I print that out at startup so I know things are working

pine bramble Mar 4, 2020, 5:55 AM

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@brave cape You'll maybe want to post a gist with all of the code you wrote or borrowed (but not distributed libs; anyone who can help will already have those, probably).

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Managing the short serial buffer, whatever it is, is important to most people who have to use the serial port, be it USART or USB.

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It's just not something I've studied quite enough, not yet.

terse canopy Mar 4, 2020, 5:57 AM

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as long as I know the behavior, it's not a problem, it's just not very well documented

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I noticed wr_idx and rd_idx of the tx buffer were changing, so I'm left wondering where the serial.flush() comes in

pine bramble Mar 4, 2020, 5:58 AM

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The world moves fast and there just isn't enough volunteers to document at that level.

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The code itself documents everything but the way the programs are structured, that's a lot of tracing.

terse canopy Mar 4, 2020, 5:59 AM

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I'm maybe guessing that what's happening is, stuff is indeed making it out of the mcu tx buffer and into my PC's rx buffer, and serial.flush() marks the transfer as complete? idk

pine bramble Mar 4, 2020, 5:59 AM

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So you have to get good at tracing from one file to another in the source tree, I guess.

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Is there a problem using the flush?

terse canopy Mar 4, 2020, 5:59 AM

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no, there's no problem

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It's just unexpected behavior

pine bramble Mar 4, 2020, 6:00 AM

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I remember something about it but it's been a while; once I added the flush statement, a particular issue got resolved.

terse canopy Mar 4, 2020, 6:00 AM

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I'm guessing Serial.println() automatically performs a flush and that's why those didn't give me issues, but Serial.write() did

pine bramble Mar 4, 2020, 6:05 AM

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I'm having trouble remembering when and where I used the flush function.

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Serial.write(c); is probably data oriented.

terse canopy Mar 4, 2020, 6:13 AM

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oh yeah, definitely

pine bramble Mar 4, 2020, 6:15 AM

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Kind of you to say so. ;) It's hard for me to try to do something and also talk about it. Sometimes when the phone rings I have to .. it's so hard to start speaking again.

brave cape Mar 4, 2020, 6:17 AM

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Hi people!
So I made this code for my arduino uno that uses an ultrasonic sensor to trigger a light. The ultrasonic sensor works and triggers the light, but when the sensor is not triggered, the light blinks on and off every second. If you think you can help me, please DM me and I can send you the code or photos of the project.

Code:

Thanks,
Sketch

#

oops,
code is here:
// defines pins numbers
const int trigPin = 9;
const int echoPin = 10;
const int led = 2;

// defines variables
long duration;
int distance;
int safetyDistance;

void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(led, OUTPUT);
Serial.begin(9600); // Starts the serial communication
}

void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

// Calculating the distance
//distance= duration*0.034/2;

safetyDistance = distance;

if (safetyDistance <= 10){
digitalWrite(led, HIGH);

}
else{

}

// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
delay(400);

}

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edit:

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int trigPin = 9;
int echoPin = 10;
int led = 7;

void setup() {
Serial.begin(9600);
pinMode(led, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
// put your setup code here, to run once:

}

void loop() {
long duration, distance;
digitalWrite(trigPin,HIGH);
delayMicroseconds(1000);
digitalWrite(trigPin, LOW);
duration=pulseIn(echoPin, HIGH);
distance =(duration/2)/29.1;
Serial.print(distance);
Serial.println("CM");
delay(10);

if((distance<=10))
{
digitalWrite(led, HIGH);
}
else if(distance>10)
{
digitalWrite(led, LOW);
}
}

pine bramble Mar 4, 2020, 6:26 AM

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@terse canopy I found what I was looking for, maybe.

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https://github.com/wa1tnr/Steno-Keyboard-Arduino-tnr/blob/master/Cortex-Forth/Cortex-Forth.ino#L95

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🔹
https://github.com/wa1tnr/Steno-Keyboard-Arduino-tnr/blob/master/Cortex-Forth/Cortex-Forth.ino#L326

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The second one uses both methods.

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T is just an int:
https://github.com/wa1tnr/Steno-Keyboard-Arduino-tnr/blob/master/Cortex-Forth/Cortex-Forth.ino#L41

pine bramble Mar 4, 2020, 6:48 AM

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I could not find extant code where I did use Serial.flush(); but ..

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it might be in a branch I'm not checked out on, in one of my local (on-disk) git repositories. ;)

reef pollen Mar 4, 2020, 1:55 PM

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@north stream I finally got it. You're right (under normal circumstances). Typically during the program the Arduino monitors the serial/usb traffic. If there is a request to program it resets the Arduino back to the bootloader. Disabling interrupts messes with that periodic function and the Arduino can't be reset via the serial port.

Therefore my only window to program is the initial bootloader loop during startup, it was just a small window. I was finally able to reprogram it by wiring up an external reset button, holding it down, and releasing it at the same time the ide tried to upload.

I'm glad I was able to figure it out, and thanks again. You seem to answer a lot of my questions and you mentioning returning to the bootloader is what got me to try this. 🍪 here's a cookie for being so cool. 😄 have a great day!

unreal finch Mar 4, 2020, 2:00 PM

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ok ive got another weird problem

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so im trying to make a leg

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📎 unknown.png

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heres the code for the IK

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and it gives me angles in degree

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📎 unknown.png

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but once the angle reaches 180 it goes like this

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📎 unknown.png

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im assuming the angle goes like this:

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📎 unknown.png

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and then

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like this

📎 unknown.png

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but i need this angle until 270 degrees

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📎 unknown.png

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and idk how to because there are gna be 2 same angles like this

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^which is the same as the first photo

📎 unknown.png

north stream Mar 4, 2020, 2:32 PM

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As you see, there are more than one way to get to certain positions, but the mechanism will generally have to "flip" at some point, the trick is to decide when that happens. You've already figured out that you need a particular angle until 270°, so the problem may reduce to explaining that to the code, and possibly making adjustments in the calculations (like "if theta1 is in this range, and theta2 is in this range, subtract pi/2 from theta1 and recalculate").

loud mural Mar 4, 2020, 3:25 PM

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Is there a place that has the dependencies list for adafruit libraries? I am trying to compile on my raspberry pi but when I was adding libraries I may have missed one or two because it doesn’t show the dependency when I add a library if you catch my meaning. So I need to add the rest of em

north stream Mar 4, 2020, 4:03 PM

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Which libraries? Arduino? Blinka?

loud mural Mar 4, 2020, 5:14 PM

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The adafruit dependencies to something like the ili9341 Taft

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Tft

north stream Mar 4, 2020, 6:48 PM

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Looks like it depends on SPI, SPITFT, and Adafruit GFX.

pine bramble Mar 4, 2020, 7:09 PM

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🛩️
@terse canopy https://github.com/technoblogy/serpente-core/blob/master/samd/cores/arduino/USB/CDC.cpp#L30
#define CDC_SERIAL_BUFFER_SIZE 256

terse canopy Mar 4, 2020, 7:09 PM

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ya

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I'm interested in running wireshark with USB packet capture at some point

pine bramble Mar 4, 2020, 7:10 PM

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That turned up when I was using ag to look for Serial.flush() stuff.

terse canopy Mar 4, 2020, 7:10 PM

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problem with hardware debugging is if I spend too long at breakpoints, the USB connection drops out because devices have to poll the bus, which is painful

pine bramble Mar 4, 2020, 7:12 PM

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/some/path/to/technoblogy/0-Distribution.d/ulisp-serpente/ulisp-serpente.ino:1123: if (address == 1) {Serial1.flush(); Serial1.end(); }

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Looks like this author wanted to make sure the serial was flushed before closing it entirely.

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I also used it ignorantly but haven't looked at the surrounding code.

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I'm starting to think something flushes the buffer out the port commonly enough that most use cases won't leverage Serial.flush() unless the intent is to stop using the port for a significant time interval.

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wchill: is there any good explanation for why when I make a Serial.write() call on a SAMD board, I don't see the results show up on the other end?
wchill: I'm testing some code so I'm shuffling 2kb of data back and forth over the serial port

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Just to recap. ;) (Trinket M0)

pine bramble Mar 4, 2020, 7:42 PM

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@terse canopy https://github.com/arduino/ArduinoCore-samd/blob/master/cores/arduino/USB/USBCore.cpp#L406

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and:
https://github.com/arduino/ArduinoCore-samd/blob/master/cores/arduino/USB/SAMD21_USBDevice.h#L268

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From TinyUSB:
https://termbin.com/mqwa

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Here's a 256'er:
https://github.com/adafruit/ArduinoCore-samd/blob/master/cores/arduino/TinyUSB/tusb_config.h#L72

deft frost Mar 4, 2020, 8:21 PM

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@north kelp yesterday you suggested "trade level-of-effort for money, and use a separate board to do your audio signal processing." is there a recommendation for small board that can out of the box have high sampling frequency and process audio data from analog or I2S microphone?

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i might have to go with designated audio board because I can't find any software solutions sadbread

surreal pawn Mar 5, 2020, 12:06 AM

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the software solution would be the teensy audio library

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[depending on the processing]

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https://www.pjrc.com/teensy/td_libs_Audio.html

hidden stump Mar 5, 2020, 1:18 AM

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Hey, I've been working on a device im developing with an lcd/w backpack, CAN module and sd card module. I've been having a lot of trouble getting the CAN and sd module to coexist on hardware spi, it's like the sd card was broadcasting on the miso line even when the CS pin was hardcoded high. I ended up putting it on software spi, but have there been ongoing problems with compatibility regarding the sd module by anyone's knowledge?

floral epoch Mar 5, 2020, 8:06 AM

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Hello

woven mica Mar 5, 2020, 5:42 PM

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hello

fast shard Mar 6, 2020, 12:39 PM

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GUYS

#

SOMEONE HELP ME

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WITH ARDUNO LIBRARIES

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facing so much issues

odd fjord Mar 6, 2020, 12:52 PM

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@fast shard what problem are you having? It's best to just post an example fo the problem so someone can help with it.

fast shard Mar 6, 2020, 12:53 PM

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I'm Newbie to arduino

Arduino: 1.8.12 (Windows Store 1.8.33.0) (Windows 10), Board: "Arduino Uno"

C:\Users\nimis\OneDrive\Documents\Arduino\sketch_mar06b\sketch_mar06b.ino: In function 'void loop()':

sketch_mar06b:20:9: error: request for member 'read11' in 'dht', which is of non-class type 'DHT()'

 dht.read11(DHT_apin);

     ^~~~~~

sketch_mar06b:20:16: error: 'DHT_apin' was not declared in this scope

 dht.read11(DHT_apin);

            ^~~~~~~~

C:\Users\nimis\OneDrive\Documents\Arduino\sketch_mar06b\sketch_mar06b.ino:20:16: note: suggested alternative: 'dht_apin'

 dht.read11(DHT_apin);

            ^~~~~~~~

            dht_apin

sketch_mar06b:23:22: error: request for member 'readHumidity' in 'dht', which is of non-class type 'DHT()'

 Serial.print(dht.readHumidity);

                  ^~~~~~~~~~~~

sketch_mar06b:26:22: error: request for member 'readTemperature' in 'dht', which is of non-class type 'DHT()'

 Serial.print(dht.readTemperature);

                  ^~~~~~~~~~~~~~~

exit status 1
request for member 'read11' in 'dht', which is of non-class type 'DHT()'

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

odd fjord Mar 6, 2020, 12:54 PM

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post cade between three "backtick" charaters so it gets formatted like this

fast shard Mar 6, 2020, 12:55 PM

#

///d

#

\\d

#

\\d

odd fjord Mar 6, 2020, 12:55 PM

#

`

fast shard Mar 6, 2020, 12:55 PM

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im facing this

📎 unknown.png

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i connected DHT11 + to 5v -to GND and mid one to the pin 2

odd fjord Mar 6, 2020, 12:58 PM

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you also need a pullup resistor on the data pin

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looking for a guide

fast shard Mar 6, 2020, 12:58 PM

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10k?

odd fjord Mar 6, 2020, 12:59 PM

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take a look at this guide https://learn.adafruit.com/dht/connecting-to-a-dhtxx-sensor

#

10K is good

fast shard Mar 6, 2020, 1:04 PM

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facing same problem

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!

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:9

odd fjord Mar 6, 2020, 1:12 PM

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so it compiles OK and loads, but you just get the read errors?

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what microcontroller are you using?

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if you have a DHT11 then uncomment the #define for DHT11 and comment out the #define from DHT22

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//#define DHTTYPE DHT22

reef pollen Mar 6, 2020, 1:31 PM

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What are lock bits used for? Are they important to set? I can't find any info on them. 32u4 if it makes any difference

fast shard Mar 6, 2020, 1:38 PM

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still getting the error @odd fjord

📎 unknown.png

zinc rampart Mar 6, 2020, 1:41 PM

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Is possible send command speech from Arduino to Google Home?

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I need consume data from my API by get method and I need speech on GoogleHome the data receive

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Or Arduino > Intermediate > GoogleHome ?

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Or Say “Ok google X” and Google response with the data receive from my API?

nimble garnet Mar 6, 2020, 2:13 PM

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Hi! Anyone know how to make a tft screen update values automatically from Adafruit IO? I've got a few feeds on adafruit that are being monitored by an ESP32 + tft screen, but the values are only updating when i press on the screen. I'd like them to be updated on the screen as soon as they are updated in the feeds. Thanks

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ill post the code in a min

nimble garnet Mar 6, 2020, 2:30 PM

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https://github.com/MarcosNiederer/marniesan/blob/master/screen1.ino

GitHub

MarcosNiederer/marniesan

My stuff I guess. Contribute to MarcosNiederer/marniesan development by creating an account on GitHub.

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line 378 is where im trying to create an "if"command to make the esp32 to update values if the feed is updated. I know this may seem simple but I'm quite inexperienced with this, so anything would help. Thanks

pine bramble Mar 6, 2020, 2:52 PM

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@nimble garnet It's good to see code uploaded on github, as that's a great user interface to it, to cite example lines from a program that's giving you trouble. ;)

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So, I would first try to see if I could unconditionally print it (with a delay) and not worry about having it print only when some condition was met, as a first approximation.

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When it's printed unconditionally, send a few characters unlikely to appear at any other time, so you can be sure what line of code did the actual printing.

nimble garnet Mar 6, 2020, 2:56 PM

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I can get it to print whenever I press the screen (tft.print "feed value").

pine bramble Mar 6, 2020, 2:58 PM

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I have no idea where you are in 300 plus lines of code. ;)

nimble garnet Mar 6, 2020, 3:00 PM

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sorry, after line 328, in every "if", there's a tft print at the end of it (lines 342, 354,366 and 379)

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those print the values each time I press the screen whenever I'm on currentpage"x"

pine bramble Mar 6, 2020, 3:01 PM

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https://github.com/MarcosNiederer/marniesan/blob/master/screen1.ino#L218
for starting the touch screen (so other people will know where this happens)

north stream Mar 6, 2020, 3:02 PM

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@reef pollen the lock bits disable reading code back out once you've uploaded it. They're intended for people who want to protect their code from copying.

pine bramble Mar 6, 2020, 3:03 PM

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This looks like a test for touchscreen input to me:
https://github.com/MarcosNiederer/marniesan/blob/master/screen1.ino#L233

#

My first question is going to be about balanced delimiters (open curly braces matched with closed curly braces).

#

Looks like 248 and 265 open and close a large code block.

nimble garnet Mar 6, 2020, 3:07 PM

#

248 opens for the first "menu", and it controls transitions between that menu and two others

#

📎 JPEG_20200306_160800.jpg

#

that's basically "currentpage 0"

#

line 265 closes that "menu"

pine bramble Mar 6, 2020, 3:09 PM

#

Yeah. There's a lot of structure here and I have not worked with this hardware. ;)

#

The general idea in programming is summarized with the expression:
top down; bottom up; middle out. ;)

#

So to me top down means the structure.

#

bottom up usually implies hardware drivers

#

middle out is connecting the two (structure, hardware).

nimble garnet Mar 6, 2020, 3:12 PM

#

yeah that's a good wat to define it

pine bramble Mar 6, 2020, 3:13 PM

#

So I am very used to definining empty functions that accept nothing and return nothing, as a kind of placeholder.

#

When the code gets messy (and near completion!) those empty functions will no longer be empty; the code in them will be near completion, but somewhat (or almost entirely) commented out.
Hard to describe that workflow very well.

nimble garnet Mar 6, 2020, 3:15 PM

#

Mhmm, that's a problem I've encountered before

pine bramble Mar 6, 2020, 3:16 PM

#

Well there's two primary ways (in C) to remove code from compilation and execution.

#

You can

/* this is a large block of commented-out code
 *
 *
 */

#

Or you can use the C preprocessor:

#

#ifdef NEVER_DEFINED
void foo(void) {
  statement();
}
#endif

#

The second method preserves syntax highlighting in the code editor.

nimble garnet Mar 6, 2020, 3:18 PM

#

never used the second one

#

but I'm used to use */

pine bramble Mar 6, 2020, 3:18 PM

#

The editor doesn't know it's dead code so it highlights the syntax correctly.

#

Ultimately I try to split the code out into separate functions and even to separate files.

#

The general process is sometimes called 'factoring' the code.

#

That might be specific to Forth, though, and not something C programmers talk about. ;)

nimble garnet Mar 6, 2020, 3:23 PM

#

Yup, so I've got it divided into different "stages" or "void" to express the different menu's and functions. I do not have issues reading it, and I understand it, it's just that I'm a bit stuck with it.

pine bramble Mar 6, 2020, 3:24 PM

#

I would also look for substitution of = where you really wanted == as that is super common.

#

(instead of testing, it got assigned due to a typo)

odd fjord Mar 6, 2020, 3:29 PM

#

@fast shard sorry - I had to go out for awhile -- can you post a picture showing how you have the DHT11 wired?

pine bramble Mar 6, 2020, 3:29 PM

#

You might be able to simulate touch screen presses, to trigger the same code structure as touching the screen triggers .. on some sort of upstream change from (adafruit.io or what-have-you). @nimble garnet

#

It looks like 31: int currentpage is a primary control variable, and a global.

#

So, one may override what is stored in currentpage to fake-out the program into believing foo has happened.

#

It looks to me (I have never used much of your code before) that you read from adafruit.io once each loop, and store the results of doing so, then test for touchscreen input, and switch to various 'screens' based on that input.

#

No touchscreen input means that loop was 'wasted' (adafruit.io was read from, but never acted on in any way at all).

#

So the touchscreen input could be stored in a state variable, and then merely 'consulted' rather than being the main thing driving program flow of execution.

#

I would remove most of the code (limit to three different events/screens).

#

Work out the correct program flow to what you want to have happen.

#

Then add in the other use cases, after overall program flow of execution functions well.

fiery lichen Mar 6, 2020, 4:19 PM

#

Do the Adafruit Hall effect sensors output a variable voltage with respect to how far a magnet it from it or is it more like a trigger device? The description makes me think the output is either 0v or 3.3v with nothing in between. But I’ve seen HES used for distance approximation many times. Do I need a different type to do this?

pine bramble Mar 6, 2020, 4:21 PM

#

I think it has to be a rapid event, @fiery lichen

north stream Mar 6, 2020, 4:22 PM

#

Yes, the US5881 is a digital, not analog, Hall effect sensor.

pine bramble Mar 6, 2020, 4:22 PM

#

https://www.adafruit.com/product/158

fiery lichen Mar 6, 2020, 4:27 PM

#

There are analog ones though right?

raven flame Mar 6, 2020, 4:28 PM

#

thrustmaster uses hall effect sensors on their warthog joystick 🙂

#

very accurate!

#

so they exist; the question is> do they exist in easy to use pcb mounted thing with i2c lol

fiery lichen Mar 6, 2020, 4:30 PM

#

Meh they’re simple. As long as it gives a 0-3.3v output I can convert using an analog input pin 🙂

raven flame Mar 6, 2020, 4:30 PM

#

yes but i2c you can read between 2 or 16 of them with just two pins 😄

#

sorry i am an i2c crazy lady 😄 i love it

fiery lichen Mar 6, 2020, 4:31 PM

#

Me too

#

I love i2c 🙂

#

Last robot I made used 8 I2c fram cards 🙂

pine bramble Mar 6, 2020, 4:34 PM

#

@fiery lichen schmitt trigger ;)

fiery lichen Mar 6, 2020, 4:35 PM

#

WHAT DID YOU CALL ME!?!?!??! 😮

#

😉

pine bramble Mar 6, 2020, 4:35 PM

#

I called you 'for dinner'.

#

When the old mercury bulb thermostat (Honeywell round thermostats were like this) .. encounters a falling temperature ..

#

.. the bulb reaches a tipping point.

#

The termostat (very rapidly) transitions from open, to closed switch (SPST) via the blob of mercury.

#

And then it doesn't want to immediately switch back to the OFF state.

#

This way, the furnace isn't being turned on and off rapidly (which could start a smokey fire type event).

#

That's an example of what's called 'hysteresis'.

#

That hall effect sensor exhibits hysteresis. It's either sharply ON or sharply OFF .. the transitions happen suddenly.

#

One of the names for this is 'schmitt trigger'.

#

https://en.wikipedia.org/wiki/Schmitt_trigger

#

So, in that plastic package of the hall effect sensor, is a schmitt trigger circuit .. in addition to the sensor itself. This sensor has been 'digitized' by the addition of the schmitt trigger to the basic sensor.

fiery lichen Mar 6, 2020, 4:48 PM

#

I need to rip off the Schmitt trigger

pine bramble Mar 6, 2020, 4:56 PM

#

It's inside a plastic potting the size of a transistor.

#

They very likely vend them somewhere without the extra stuff included (just the sensor).

#

They might even offer both kinds in the same package.

north stream Mar 6, 2020, 5:14 PM

#

Yes, there are plenty of analog Hall effect sensors in the Eline style package.

#

https://softsolder.com/2013/08/14/ebay-49e-hall-effect-sensors-parameter-spread/

The Smell of Molten Projects in the Morning

Ed

eBay “49E” Hall Effect Sensors: Parameter Spread

So this lot resembles 49E sensors in both bias and gain.

pine bramble Mar 6, 2020, 5:17 PM

#

I was going with
https://www.digikey.com/products/en/sensors-transducers/magnetic-sensors-position-proximity-speed-modules/552?k=hall effect sensor

fiery lichen Mar 6, 2020, 6:32 PM

#

@pine bramble can you check your link? When I click it on my phone it says it’s not found

pine bramble Mar 6, 2020, 6:36 PM

#

@fiery lichen I'm not sure I found anything new, there. Unfiltered output doesn't seem to be a strong suit for these sensors - they seem to favor interpreted/filtered output. I'm just not sure; I don't use them so I'm just glancing at the literature.

#

This may be useful:
https://www.littelfuse.com/~/media/electronics/datasheets/hall_effect_sensors/littelfuse_hall_effect_sensors_55100_datasheet.pdf.pdf

#

Kind of looks like they are programmed for a specific range (distance, 'D') by LittleFuse!

#

Like you have to buy them pre-programmed, and are stuck with that one setting.

#

and they're $14.70 apiece. ;)

zinc rampart Mar 6, 2020, 9:29 PM

#

Help me 😬

#

How read sensor info (DHT11) with Google Home ?

nimble garnet Mar 6, 2020, 11:18 PM

#

@pine bramble I'll keep what you wrote earlier today in mind, thank you again! sorry for not responding earlier, I was away

pine bramble Mar 6, 2020, 11:59 PM

#

@nimble garnet Online stuff is often asynchronous .. for hours, and even days. ;)

nimble garnet Mar 7, 2020, 12:00 AM

#

yup, always like that 😉

pine bramble Mar 7, 2020, 10:27 AM

#

Can someone hep me with making a self parking car i am trying to make it but i don't work

#

i wanna use arduino uno

north stream Mar 7, 2020, 1:12 PM

#

How far have you gotten? What sort of approach are you taking?

timber smelt Mar 7, 2020, 2:23 PM

#

For a 1602 display

#

do i need something connected to the buttom of the display so i can connect it to the uno?

elder hare Mar 7, 2020, 2:30 PM

#

https://www.youtube.com/watch?time_continue=648&v=c0tMGlJVmkw&feature=emb_title

this guy says there are fewer librarys on ESP32 then there are on ESP8266 is this correct? :S so if i upgrade there is a chance that one of the libs im using is not supported on ESP32? :S

YouTube

The Hook Up

The best input and output pins on the NodeMCU ESP32 and ESP8266

ESP8266 NodeMCU pinMode Diagram: https://github.com/thehookup/Wireless_MQTT_Doorbell/blob/master/PinModes_ESP8266_NodeMCU.jpg

ESP32 NodeMCU Pin Diagram: https://github.com/thehookup/ESP32_Ceiling_Light/blob/master/PinModes_ESP32_NodeMCU.jpg

Buy an ESP8266 NodeMCU: https://am...

▶ Play video

feral pivot Mar 7, 2020, 2:39 PM

#

hi I'm trying made my smart home control panel with an touchscreen arduno mega tft display module .I'm using UTFT Buttons Library but I touched the password but buttond not deleted.Can help me?
Also does anyone know Turkish on this server?

timid hedge Mar 7, 2020, 6:27 PM

#

Does anyone know of a web based application that will allow you to make arduino circuit images?

#

Like this for example.

📎 ardu_example.png

#

Or recommendations I should say.

woven mica Mar 7, 2020, 6:31 PM

#

This is made by fritzing, but it is not web based ~~fortunately~~

timid hedge Mar 7, 2020, 6:31 PM

#

Ah. Ok. Thank you!

cedar mountain Mar 7, 2020, 7:16 PM

#

Thanks! I had been curious what all those images were made with as well.

fervent arrow Mar 7, 2020, 10:19 PM

#

#include "SoftwareSerial.h"

//storing the state of the buttons
bool red1 = false;
bool green1 = false;
bool blue1 = false;
bool red2 = false;
bool green2 = false;
bool blue2 = false;
bool relay1 = false;
bool relay2 = false;


#include <ESP8266WiFi.h>
WiFiServer server(80);
IPAddress IP(192, 168, 4, 15);
IPAddress mask = (255, 255, 255, 0);
byte ledPin = 2;
void setup() {
  Serial.begin(9600);
  WiFi.mode(WIFI_AP);
  WiFi.softAP("Wemos_AP", "Wemos_comm");
  WiFi.softAPConfig(IP, IP, mask);
  server.begin();
  pinMode(ledPin, OUTPUT);
  Serial.println();
  Serial.println("accesspoint_bare_01.ino");
  Serial.println("Server started.");
  Serial.print("IP: "); Serial.println(WiFi.softAPIP());
  Serial.print("MAC:"); Serial.println(WiFi.softAPmacAddress());
}
void loop() {
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  digitalWrite(ledPin, LOW);
  String request = client.readStringUntil('\r');
  Serial.println("********************************");
  Serial.println("From the station: " + request);
  client.flush();
  Serial.print("Byte sent to the station: ");
  Serial.println(client.println(request + "ca" + "\r"));
  digitalWrite(ledPin, HIGH);
  //copy pasting lol
  if(Serial.available()>0){
    String Received = Serial.readString();
    if(int(Received[0]) == 1){
      Serial.println("Red1");
      }
    }
}```

#

Hello, i am using a nextion lcd and I want to recrive some avriables when I press a button. I figured all of the sending the variable to the esp via rx and tx but now i want to make a code that recrives the value 1 and prints red1 but it gives me an error. The other stuff of the code is being used to transmitt the data to another esp(not yet implemented, i want to print to the serial monitor that the esp has recrived the velue 1 from the screen. Here is the error it givem me while I am trying to compile
it is long, had to uplaod it to a txt file

#

📎 message.txt

#

and I am also using electronoob's video for reference: https://www.youtube.com/watch?v=akpF9TbvNss&t=567s

#

Thanks!

fervent arrow Mar 7, 2020, 10:37 PM

#

fixed it by rmoving the nextion libary, hope I won't be eeding it for later

pine bramble Mar 7, 2020, 10:47 PM

#

@cedar mountain https://github.com/fritzing/fritzing-app
Have not used this since early 2018.

#

https://packages.debian.org/stretch/fritzing

#

I can probably install that version as I have a machine that still runs Debian 9.9 (stretch).

#

Looks like they ported it to 'buster' also.

simple horizon Mar 8, 2020, 12:39 AM

#

Does anyone know how to use the PM5003 on the esp32 feather?

safe shell Mar 8, 2020, 1:26 AM

#

More specific question than answered here? https://learn.adafruit.com/pm25-air-quality-sensor

#

Or is that the wrong thing?

simple horizon Mar 8, 2020, 1:27 AM

#

That's what I'm using but the software serial doesn't work because that's for arduino. The hardware serial doesn't work because Serial1 not found

safe shell Mar 8, 2020, 1:28 AM

#

Oh, this is Arduino room. You have to set up Serial1 on some pins, like...

#

Serial1.begin(115200, SERIAL_8N1, 16, 17);

covert skiff Mar 8, 2020, 1:30 AM

#

I'm having a problem with a project, I have a 4 button fan pwm controller that I am making and it works but not completely.

The 4 buttons control the fan at 25, 50, 75, and 100% speed. on setup it should set the output of the pwm to 25% but it is not.

Anyone have any ideas?


#define speedpin1 2 //  push button for 25
#define speedpin2 3 // push button for 50
#define speedpin3 4 //  push button for 75
#define speedpin4 5 // push button for 100
int fansp1,fansp2,fansp3,fansp4;



void setup() {
  pinMode(speedpin1,INPUT_PULLUP);// set pin for push button 25
  pinMode(speedpin2,INPUT_PULLUP);// set pin for push button 50
  pinMode(speedpin3,INPUT_PULLUP);// set pin for push button 75
  pinMode(speedpin4,INPUT_PULLUP);// set pin for push button 100
  analogWrite(fanPin,64);
}



void loop() {

    fansp1 = digitalRead(speedpin1);// read status of button speedpin1
    fansp2 = digitalRead(speedpin2);// read status of button speedpin2
    fansp3 = digitalRead(speedpin3);// read status of button speedpin3
    fansp4 = digitalRead(speedpin4);// read status of button speedpin4
    
        
    if(fansp1 ==LOW)
    {
      analogWrite(fanPin,64);
    }else if(fansp2 ==LOW)
    {
      analogWrite(fanPin,127);
    }else if(fansp3 ==LOW)
    {
      analogWrite(fanPin,191);
    }else if(fansp4 ==LOW)
    {
      analogWrite(fanPin,255);
    }
  delay(50);
}// loop ```

simple horizon Mar 8, 2020, 1:32 AM

#

@safe shell it still says serial1 not declared

safe shell Mar 8, 2020, 1:33 AM

#

You've got that in setup()? I didn't think there were any includes necessary for it.

simple horizon Mar 8, 2020, 1:34 AM

#

Yea it's in setup

#

Can you post some esp32 feather code for me to try

safe shell Mar 8, 2020, 1:34 AM

#

Sure, I have Serial and Serial1 in an ESP32 sketch, give me a few minutes to pare it down

#

You have "Adafruit ESP32 Feather ESP32" selected as your board?

simple horizon Mar 8, 2020, 1:37 AM

#

nm

#

I'm dumb af

safe shell Mar 8, 2020, 1:39 AM

#

Working? Cool.

short hawk Mar 8, 2020, 2:03 AM

#

hello, could someone guide me, I'd like to send midi messages from my computer over usb to my arduino

#

I got the arduino midi library, and I'm using an internal midi router (loopMIDI), but I can't figure out how to set the virtual midi port to be sent to my arduino

north stream Mar 8, 2020, 2:20 AM

#

Are you using the Arduino as a USB MIDI port, or are you using a USB-MIDI adapter to talk to your Arduino?

short hawk Mar 8, 2020, 2:46 AM

#

im connecting to the arduino through its usb input

#

hmm.. so maybe what I need is a midi to serial thing?

#

internal midi to serial... thing

#

ah wait, youre saying the arduino should be showing up as a midi device on my machine?

#

that would be ideal

#

im using the ProMicro

#

I think what I need is the MIDIUSB library

#

not the MIDI Library

north stream Mar 8, 2020, 3:28 AM

#

Hmm, it would show up as a serial device, and I think a MIDI interface is also a serial device.

#

You're probably right about the library

short hawk Mar 8, 2020, 3:32 AM

#

its cool I got it working with the MIDI USB library!!

#

thank you, I had given up until I saw your question heh

elder hare Mar 8, 2020, 4:14 PM

#

question, if you by a mistake solder on +5V on DIN and DIN on +5V on this will it fry it?
https://www.kjell.com/globalassets/productimages/273513_87904.tif?ref=625C36EB14&format=jpg&w=960&h=960&mode=pad

north stream Mar 8, 2020, 4:36 PM

#

Probably not, depending on the impedance of the DIN signal.

fiery lichen Mar 8, 2020, 5:02 PM

#

Most feather micro boards list the max driving current on their output pins.....typically 20mA or so. On the seesaw board they use an example of driving an led direct from the pin. Is there a spec on what is the Mac driving current of the pins on the seesaw board?

#

📎 image0.png

cedar mountain Mar 8, 2020, 5:14 PM

#

Looks like the ATSAMD09 datasheet says max of 7mA source and 10mA sink at 3.3V supply, with the pins in the high drive strength configuration.

fiery lichen Mar 8, 2020, 5:33 PM

#

So if I’m lighting this led, with a forward voltage of 2.2v it’s V=IR but the voltage across the resistor is (3.3-2.2) so 1.1v. If I use a 1000 ohm resistor the current draw is .0011amps....or 1.1mA.

Am I doing the math right?

#

https://www.adafruit.com/product/1441

16mm Illuminated Pushbutton - Yellow Momentary

A button is a button, and an LED is a LED, but this LED illuminated button is a lovely combination of both! It's a medium sized button, large enough to press easily but not too big that ...

cedar mountain Mar 8, 2020, 5:38 PM

#

Yep, that looks correct.

fiery lichen Mar 8, 2020, 6:10 PM

#

Ok so then last question.....if I have 3 of those LED’s in parallel and I want to run them all through one resistor, how does that change the equation

fervent arrow Mar 8, 2020, 6:12 PM

#

Hey, who hasused nextion displays before? I am having some problems with it as desribed here: https://forum.arduino.cc/index.php?topic=669540.0

Cannot read from nextion display then send data to another esp

#

if someone could help it would be greatly appriciated

north stream Mar 8, 2020, 6:31 PM

#

@fiery lichen it's generally not a good idea to run LEDs in parallel, but the way to do so is to add all their currents and calculate the resistor for that current.

fiery lichen Mar 8, 2020, 6:32 PM

#

If I’m out of digital out gpio, would it be better to use a pwm pin as 100% on, 0% off?

raven flame Mar 8, 2020, 6:33 PM

#

@fiery lichen there are two ways to do the resistors with LEDs in parallel.

📎 unknown.png

#

in both cases there is about 14ma going across each LED (ideal LEDs in this case, your values will differ)

#

obv. 43.426 should be 0.043426 😄

north stream Mar 8, 2020, 6:40 PM

#

I thought PWM pins were digital I/O?

fiery lichen Mar 8, 2020, 6:41 PM

#

📎 image0.png

#

They call them out separately so I wasn’t sure

raven flame Mar 8, 2020, 6:42 PM

#

^^ this was "how to wire three LEDs in parallel" 🙂

fiery lichen Mar 8, 2020, 6:44 PM

#

So do I really have 10gpio digital, it’s just 3 of them are capable of pwm?

safe shell Mar 8, 2020, 6:44 PM

#

Yes, generally PWM is a subset of the GPIO capability

#

Not all GPIO has PWM, but PWM is generally a GPIO

#

There is typically a lot of overlap in those specs... analog inputs and outputs are often also digital pins (conceptually, digital is just analog collapsed to two levels, 1-bit)

fiery lichen Mar 8, 2020, 6:49 PM

#

Right. I’ve used analog pins as digital on micros, seesaw is just new to me so I don’t want to assume anything 🙂

#

There’s no “ports” on a seesaw though right? Like on the 32u4 they say each pin can drive 20mA, but the port can’t exceed 80mA total (numbers aren’t right, but just for instance )

raven flame Mar 8, 2020, 6:53 PM

#

as for resistors in parallel.

1/Rt = (1/R1) + (1/R2) + (1/R3)
eg> 73 = 1/0.013636 = (1/220)+(1/220)+(1/220)
3 LEDs each with 220R in parallel is the same as 3 LEDs sharing a single 73R resistor.

north stream Mar 8, 2020, 6:55 PM

#

Theoretically the same, but LEDs don't tend to share current equally very well, whichever one has the lowest forward voltage tends to hog more current.

fiery lichen Mar 8, 2020, 6:59 PM

#

If the led has a forward voltage of 0.7v and you have 3 in parallel, do you handle getting the total forward voltage like you would get the resistance of 3 resistors in parallel? 1/Rt = 1/r1 + 1/r2 + 1/r3

Vs

1/Vt = 1/V1 + 1/V2 + 1/v3?

raven flame Mar 8, 2020, 7:00 PM

#

no

#

voltage in series is Vt = V1 + V2

north stream Mar 8, 2020, 7:02 PM

#

Parts in parallel have the same voltage, so if you had 3 LEDs with 2V forward voltage in parallel, it would still be 2V. Their currents would add.

#

However, LEDs vary some, so if one was 2.002V, one was 2.000V, and one was 1.998V, the voltage would get pulled down to around 1.998V and the LED pulling it down would get more current (since the other LEDs are now being slightly undervolted).

#

This is why I tend to recommend individual resistors for LEDs in parallel.

fiery lichen Mar 8, 2020, 7:30 PM

#

Ok!

lost nest Mar 8, 2020, 7:51 PM

#

And even worse: diodes' voltage drop has a negative temperature coefficient, so the imbalance magnifies as time goes on (a diode that's lower forward voltage to start with gets even lower voltage as it gets hotter).

#

This is a big deal for switching power circuits, somewhat less so here.

#

Also, for what it's worth, depending on what type of LED you have, 14mA can be absolutely blinding out of modern high-performance LEDs.

#

Most of the small surface-mount blinkenleds I use I run at 1mA or less.

fiery lichen Mar 8, 2020, 8:05 PM

#

Yea I’ve found tiny currents make for sufficiently bright LEDs

pine bramble Mar 8, 2020, 8:07 PM

#

There are online calculators for LED current limiting resistors.

#

http://led.linear1.org/led.wiz

#

https://web.archive.org/web/20070416181814/http://www.oksolar.com/led/led_color_chart.htm

tight halo Mar 8, 2020, 8:39 PM

#

Would this shield support 3 servos, one TCS3200 color sensor, the motor controller, and an ultrasonic sensor? https://i.stack.imgur.com/C2PIP.png

#

the shield is a Sensor shield v5.0

#

and the motor controller and ultrasonic sensor are already shown.

tight halo Mar 8, 2020, 8:57 PM

#

I need to make sure everything will work before I purchase it!

north stream Mar 8, 2020, 9:13 PM

#

I think it will all work, but it's always tough to be "sure".

tight halo Mar 8, 2020, 9:14 PM

#

ok thanks

#

even with 3 servos?

north stream Mar 8, 2020, 9:17 PM

#

The servos are easy, they just need a PWM lead apiece.

#

A separate servo board is nice, but I don't think you need one. You may need PWM for the motor controller too, I don't know.

tight halo Mar 8, 2020, 9:21 PM

#

you do 😐

#

but then again I saw a guy connect servos to the 8 and 7 pins on the sensor board and still work?

unreal tinsel Mar 8, 2020, 10:06 PM

#

Hi! I'm working with a bluefruit nrf52832 and have some questions. Is this the right place to ask?

#

Specifically, I updated the boot loader as per the instructions on the site. I'm wondering if it is normal that now every time I upload to my board, it will say "activating new firmware, device programmed". Just trying to double check that I didn't do anything weird to it

fast shard Mar 8, 2020, 10:27 PM

#

i have esp8266 wifi module, when i connect it to the arduino then it gives me random characters in my serial monitor, please help someone
attachment is below:

📎 unknown.png

odd fjord Mar 8, 2020, 10:39 PM

#

@fast shard I think you can ignore that. . When the ESP8266 boots it puts out some information at a non standard baud rate. Try uploading a sketch and see how it works.

fast shard Mar 8, 2020, 10:39 PM

#

okay wait!

#

it is working, when i changed 3.3v to 5v

#

O_o

odd fjord Mar 8, 2020, 10:40 PM

#

Make sure to console baud rate matches the rate in the sketch.

#

👍

fast shard Mar 8, 2020, 10:41 PM

#

also i have one question regarding sending data to my xampp server which i have hosted on EC2 AWS

#

could you please help me with that?

odd fjord Mar 8, 2020, 10:44 PM

#

That is not something I am familiar with. Post your question. Hopefully someone can help.

fast shard Mar 8, 2020, 10:46 PM

#

basically, I have xampp server. I want to send data to the server using esp8266, using post method, is there any reference?

safe shell Mar 8, 2020, 10:55 PM

#

Similar to GET method, just need to also send the data, may need Content-Type: application/x-www-form-urlencoded header with data in key-value form. did a search for "ESP8266 Arduino POST" and a few things showed up... more clues than fully worked out examples

#

If the amount of data is on the smaller side, you may be able to use GET with query strings, like ...index.html/?x=123&y=456 to get things going while you work on POST

fiery lichen Mar 9, 2020, 2:07 AM

#

So, bummer, it appears on the seesaw board that pwm pins can only be used as pwm and not digital.

Can someone tell me how to send a pwm signal to one of the seesaw pins? I defined pin 5 as

pinMore(5,output)

AnalogWrite(5,255) doesn’t seem to work nor does digitalWrite(5.HIGH)

https://learn.adafruit.com/adafruit-seesaw-atsamd09-breakout/pwm

Adafruit Learning System

Adafruit seesaw

An I2C to ... whatever! interface

#

Sorry, ss.pinMode(5,output)

safe shell Mar 9, 2020, 2:13 AM

#

I don't see any PWM examples, but the library code has a function https://github.com/adafruit/Adafruit_Seesaw/blob/abe23cd6c55959f9e28ee100faac5ec6b2d86c08/Adafruit_seesaw.cpp#L399 that seems to behave like an Arduino AnalogOut (PWM)

#

Separate function to set frequency

fiery lichen Mar 9, 2020, 2:14 AM

#

I just got it, I’m an idiot. Forgot it’s not analogWrite it’s ss.analogWrite to tell it you mean the seesaw board and not the micro ....DOH!

safe shell Mar 9, 2020, 2:17 AM

#

I didn't realize about the seesaw that the pins weren't as multi-function as we're used to. TIL.

north stream Mar 9, 2020, 2:19 AM

#

They can be assigned different functions, but it requires rebuilding the Seesaw binary.

#

However, the PWM pins might respond to ss.digitalWrite(). If not, the 100% PWM trick might work.

fiery lichen Mar 9, 2020, 2:19 AM

#

Yeah I’d love to make them all digital IO for my project but I’m not confident rebuilding binary

#

Ss.analogWrite(5,255) works....just can only be an output, not input which is a bummer, but I can work around it 🙂

lusty bear Mar 9, 2020, 3:50 AM

#

Hi, is this the right place to ask about nrf52840 feather express coding? Im trying to send multiple data via UART.

#

How can I possibly do that?

north stream Mar 9, 2020, 3:54 AM

#

What do you mean by send multiple data? Sending more than one byte, or having more than one stream of data, or sending encoded data (like floating point numbers)?

lusty bear Mar 9, 2020, 4:00 AM

#

Having more than one stream I guess.. because the data im going to send is two different sensor value

cedar mountain Mar 9, 2020, 4:06 AM

#

A simple method is to just include a label character with each data value or something, so it looks like "A10.2 A11.9 B312 A10.8 A11.0 B309" etc. and the receiver can pull the data type apart easily.

lusty bear Mar 9, 2020, 4:09 AM

#

📎 Screenshot_2020-03-09-12-08-56.png

#

Like so?

lost nest Mar 9, 2020, 4:12 AM

#

I think you want e.g. Bleuart.print("A:"); Bleuart.println(sensor1);

#

then same for B

#

not sure what language you're using, if it's python I think the prints can get merged like you did.

lusty bear Mar 9, 2020, 4:19 AM

#

Im using the adafruit Bluefruit application to see the results in the UART terminal it came out okay

#

📎 Screenshot_2020-03-09-12-18-18.png

#

📎 Screenshot_2020-03-09-12-17-58.png

#

But the plotter didnt seems to gave any output

lost nest Mar 9, 2020, 4:22 AM

#

That makes sense, the plotter I think assumes just a single stream of numbers

cedar mountain Mar 9, 2020, 4:24 AM

#

Heh heh, that would have been helpful to mention in your original question: "How can I send values from multiple sensors in a way compatible with the Bluefruit app's plotter?"

lost nest Mar 9, 2020, 4:25 AM

#

The tutorial looks pretty good here: https://learn.adafruit.com/bluefruit-le-connect/plotter

#

Instead of doing the A/B we suggested

#

jJust do print one number, then print a comma, then print second number

lusty bear Mar 9, 2020, 4:33 AM

#

Thank you for the information nevertheless. I've figured out what to do

#

👍

stark mist Mar 9, 2020, 5:00 AM

#

Hello

#

anyone around?

#

I have a general question regarding the adafruit arduino apis, I'm using the arduino ide really for the first time in any depth, however, I cant find how to get to the api reference guide?

#

I'm use to visual studio where I can tag to functions or headers and read at least the comments or function definitions. Without it I'm feeling rather lost bar the general programming and examples.

#

I'm wondering how and where I can look up a specific function definition including its parameters for any of the adafruit modules apis?

lusty bear Mar 9, 2020, 5:55 AM

#

Hi again, anyone familiar with bluetooth services and characteristics? Is there any tutorial that I can follow to add a characteristics into UART services?

#

📎 Screenshot_2020-03-09-13-53-14.png

#

Currently there is two characteristics in the UART services, im trying to add a third. Any tutorial or ideas?

sharp turret Mar 9, 2020, 6:36 AM

#

@stark mist The Arduino IDE doesn't go there. There are some provisions to get VScode to work .

For me, I use Gihub and google. Both the Arduino Library (misnamed as a language) and Adafruit's libraries are all on Github. For example, when I want to look deeper into an Arduino function, I'll search google for "github avrcore <function>". avrcore works for the 8-bit AVR boards.

stark mist Mar 9, 2020, 6:37 AM

#

hey

sharp turret Mar 9, 2020, 6:37 AM

#

for Adafruit specific libraries, I find it helpful to search "github adafruit <library>" and then using github's "search within repository" from there.

stark mist Mar 9, 2020, 6:38 AM

#

thanks Baldengineer

#

that is pretty much what I resolved to, I tried to use the arduino extension for vs but ran into issues getting it compile

#

I was really hoping for a nice documentation I'm use to with winapi or qt

#

pretty much found everything I needed with the method you described

#

@sharp turret thanks

sharp turret Mar 9, 2020, 6:43 AM

#

the arduino library is well described on arduino.cc. for those functions I search "arduino reference <function>"

gilded jay Mar 9, 2020, 1:10 PM

#

guys is it possible to create something
that measure the perceived temperature instead of the effective temperature? I have a BME680 environmental sensor
please quote me if you answer me

safe shell Mar 9, 2020, 3:34 PM

#

@gilded jay You can use your temp,, humidity, etc measurements to calculate or look up Wind Chill, Heat Index, etc

zinc rampart Mar 9, 2020, 9:51 PM

#

How install ESP8266 for arduino uno ?

#

I can't compile ESP8266Wifi.h for Arduino UNO

#

I have a module ESP8266 and i want implement for my board

north stream Mar 9, 2020, 10:00 PM

#

Go to preferences and add https://arduino.esp8266.com/stable/package_esp8266com_index.json to Board Manager URLs

#

Then go to Tools -> Boards -> Board Manager, scroll down to "esp8266 by ESP8266 Community" and click on "install".

#

However, the Arduino Uno does not have an ESP8266, so I'm guessing you might mean the Arduino IDE. However, you might mean something else (like an Arduino ESP8266 WiFi shield). If that's the case, you'd need to do something different.

zinc rampart Mar 9, 2020, 10:04 PM

#

I have this module esp8266

📎 300px-ESP-01.png

#

And this arduino

📎 image.png

#

And what I want is to connect the module to my arduino

north stream Mar 9, 2020, 10:12 PM

#

You'll need a few things. You'll need a level shifter because the Arduino is 5V and that module is 3V. And you'll need to decide how you want to use the module. Normally they come with firmware that lets you control them with simple "AT" style commands, and you can use these to get WiFi functionality fairly easily.

#

However, it's also possible to write custom programs for the WiFi module itself.

zinc rampart Mar 9, 2020, 10:12 PM

#

That arduino also has 3.3v output

#

I just want it to connect it to MySQL

#

I have another "Wemos D1" card and I managed to connect that to MySQL but I would like to connect Arduino UNO with ESP8266

north stream Mar 9, 2020, 10:14 PM

#

While the Uno has a 3.3V output, that's just a power supply, you still need to convert the receive and transmit data signal levels (unless it's a 3V Arduino).

#

You might look at this library: https://github.com/bportaluri/WiFiEsp

GitHub

bportaluri/WiFiEsp

Arduino WiFi library for ESP8266 modules. Contribute to bportaluri/WiFiEsp development by creating an account on GitHub.

zinc rampart Mar 9, 2020, 10:20 PM

#

I will check it, thanks

grand walrus Mar 9, 2020, 10:24 PM

#

Has anyone used a LoRa with a Arduino to receive and transmit radio waves

odd fjord Mar 9, 2020, 10:25 PM

#

Yes

#

What hardware and software are you using?

low hornet Mar 9, 2020, 10:36 PM

#

can i blink the trinket's led or neopixel with setting a eg.50/50 pwm signal of say 5hz? i read the min. freq. for an arduino uno is something like 30hz, how is that going on an M0?

leaden walrus Mar 9, 2020, 11:04 PM

#

yes, for the LED:

Adafruit CircuitPython 5.0.0 on 2020-03-02; Adafruit Trinket M0 with samd21e18
>>> import board
>>> import pulseio
>>> pwm = pulseio.PWMOut(board.D13, frequency=5)
>>> pwm.duty_cycle = 2**15
>>>

#

neopixels work differently

leaden walrus Mar 9, 2020, 11:37 PM

#

oops. wrong language. nevermind, that's a circuitpython example.

stark mist Mar 10, 2020, 3:43 AM

#

I'm attempting to figure out the bluetooth le on the CLUE using the ardunio sdk, I cant seem to find any examples specifically for the clue that work, perhaps I'm looking in the wrong place and anyone point me in the right direction please?

stark mist Mar 10, 2020, 4:09 AM

#

nevermind found em lol just being blind

stark mist Mar 10, 2020, 6:04 AM

#

I love the adafruit arduino for the CLUE

#

you all rock

lusty bear Mar 10, 2020, 6:27 AM

#

Hello, i'm still trying to add extra characteristic to UART service in nrf52840 feather express anyone can lend a hand?

wintry berry Mar 10, 2020, 6:53 AM

#

hi, how do I set the time to something specific with the DS1307? like if ... set the time to 00,00,00,10,03,20 (midnight 10 march 2020)

fervent arrow Mar 10, 2020, 7:15 AM

#

can someone help me? I have a nextion display on a esp8266 and I am transmitting it's data over wifi to another esp but nothing is happening when I press the button

#

#include <NexButton.h>
#include <NexCheckbox.h>
#include <NexConfig.h>
#include <NexCrop.h>
#include <NexDualStateButton.h>
#include <NexGauge.h>
#include <NexGpio.h>
#include <NexHardware.h>
#include <NexHotspot.h>
#include <NexNumber.h>
#include <NexObject.h>
#include <NexPage.h>
#include <NexPicture.h>
#include <NexProgressBar.h>
#include <NexRadio.h>
#include <NexRtc.h>
#include <NexScrolltext.h>
#include <NexSlider.h>
#include <NexText.h>
#include <NexTimer.h>
#include <Nextion.h>
#include <NexTouch.h>
#include <NexUpload.h>
#include <NexVariable.h>
#include <NexWaveform.h>

#include <SoftwareSerial.h>
#include <ESP8266WiFi.h>
//definding butons
//NexButton name = NexButton(page, id, "name")
NexButton b0 = NexButton(1, 2, "b0");

NexTouch *nex_listen_list[] = {
  &b0,
  NULL
  };

//object name pushcallback(void *ptr)

void b0PushCallback(void *ptr) {
  Serial.println("Red1");
  }
//wifi stuff
WiFiServer server(80);
IPAddress IP(192, 168, 4, 15);
IPAddress mask = (255, 255, 255, 0);

void setup() {
  Serial.begin(9600);
  //wifi part
  WiFi.mode(WIFI_AP);
  WiFi.softAP("Wemos_AP", "Wemos_comm");
  WiFi.softAPConfig(IP, IP, mask);
  server.begin();
  Serial.println();
  Serial.println("accesspoint_bare_01.ino");
  Serial.println("Server started.");
  Serial.print("IP: "); Serial.println(WiFi.softAPIP());
  Serial.print("MAC:"); Serial.println(WiFi.softAPmacAddress());
  //nextion sutff
  b0.attachPush(b0PushCallback);
}

void loop() {
  nexLoop(nex_listen_list);
  //wifi stuff again
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  String request = client.readStringUntil('\r');
  Serial.println("********************************");
  Serial.println("From the station: " + request);
  client.flush();
  //Serial.print("Byte sent to the station: ");
  //Serial.println(client.println("IamAlive\r"));
  }```

safe shell Mar 10, 2020, 3:28 PM

#

@wintry berry There's an example in the commented-out part here https://github.com/adafruit/RTClib/blob/master/examples/ds1307/ds1307.ino

wintry berry Mar 10, 2020, 4:07 PM

#

@safe shell Thank you, but I was solved it.

After really long time I found how to make it work, rtc.begin(); is critical otherwise the RTC will ignore the rtc.adjust, on the year the number can't be smaller then 2000 (I was trying to set it to 1970)

my example code https://paste.debian.net/1134287/

fast shard Mar 10, 2020, 4:09 PM

#

Similar to GET method, just need to also send the data, may need Content-Type: application/x-www-form-urlencoded header with data in key-value form. did a search for "ESP8266 Arduino POST" and a few things showed up... more clues than fully worked out examples
@safe shell okok

zinc rampart Mar 11, 2020, 12:36 AM

#

Which board do you recommend for MEGA with Wi-Fi module?

humble anchor Mar 11, 2020, 3:51 PM

#

What do you want to do? @zinc rampart

#

And do you really need a Arduino MEGA?

zinc rampart Mar 11, 2020, 5:45 PM

#

Yes, because i need 15 sensors

north stream Mar 11, 2020, 5:47 PM

#

Depending on the sensors, you may not need a Mega. For example, if they're I2C sensors, they might be able to share a bus.

signal horizon Mar 11, 2020, 6:11 PM

#

hello, I'm looking to get started with my first arduino project, im looking at putting text on some of the LED matrixes, is there a command line script or piece of software I can use to put scrolling strings on?

zinc rampart Mar 11, 2020, 6:14 PM

#

Depending on the sensors, you may not need a Mega. For example, if they're I2C sensors, they might be able to share a bus.
@north stream They are: IR, DHT11, FIRE, GAS, RFID

#

Presence

north stream Mar 11, 2020, 6:16 PM

#

Some of those will want individual control leads, yes. You could either use a Mega or an I/O expander with a smaller board. The reason we bring it up is there are more Wi-Fi options in other form factors.

#

@signal horizon The AdaFruit GFX library supports things like scrolling text. https://learn.adafruit.com/smssenger-bag/smssenger-code

signal horizon Mar 11, 2020, 6:19 PM

#

thats a start, i might also mention i am exceptionally un-gifted when it comes to programming

north stream Mar 11, 2020, 6:21 PM

#

A fair amount of programming boils down to "find something that does sort of what I want, then remove all the bits I don't need".

signal horizon Mar 11, 2020, 6:23 PM

#

i'll have it hooked in through USB

north stream Mar 11, 2020, 6:23 PM

#

In this case, a chunk of the example code is concerned with receiving SMS messages, which you probably don't care about. The last dozen or so lines are most of the scrolling part.

signal horizon Mar 11, 2020, 6:23 PM

#

so ideally i'd just do -> command "blah" and then blah goes on the screen

#

i can rig it up to do what i want from there with other software

north stream Mar 11, 2020, 6:24 PM

#

There may be a way to do that, but I don't know how offhand.

#

But I like your modular approach: have one piece that you can call to scroll the message on the display and have other pieces call it.

zinc rampart Mar 11, 2020, 6:29 PM

#

Some of those will want individual control leads, yes. You could either use a Mega or an I/O expander with a smaller board. The reason we bring it up is there are more Wi-Fi options in other form factors.
@north stream So what can you recommend me? I need to send all the data to a database, so I use one with a wifi module

north stream Mar 11, 2020, 6:31 PM

#

Somewhat depends on your use case. I have a fondness for the Metro M4 AirLift https://www.adafruit.com/product/4000 but there are several other good choices, each with different capabilities and features.

strong swan Mar 12, 2020, 2:09 AM

#

@zinc rampart
Or you can use a different product. Normally i would not say it because Adafruit things are ok. In this case look at the UNO+WIFI from RobotDyn. I use them often for other things. They working very well on the board in the size of the UNO.

stable raven Mar 12, 2020, 2:42 PM

#

Hi. I got this product for a university project where have to use the arduino to make a controller for a game https://uk.banggood.com/Geekcreit-UNO-R3-Improved-Version-2_8TFT-LCD-Touch-Screen-2_4TFT-Touch-Screen-Display-Module-Kit-p-1428291.html?rmmds=search

www.banggood.com

UNO R3 Improved Version + 2.8TFT LCD Touch Screen + 2.4TFT Touch Sc...

Online Shopping at Banggood.com！

#

my idea was to use the touch screen as an input for my game. Touchscreen arrived and I have no idea how to use it properly and there seems to be multiple issues.

I plugged the touchscreen into the board (since it was a shield I just had to line it up), downloaded adafruit_GFX and adafruit_TFTLCD and got a sample project running. The problems that came up are:

When I do tft.begin(0x9325); the screen becomes a mess of multi-colored pixels.

#

and doing something like:

  tft.reset();
  tft.begin(0x9325);
  tft.fillScreen(GREEN);

doesn't seem to work properly either (this code is in setup() ). Only about 1 quarter of the screen actually gets filled

#

Am I doing something wrong? The project is due in on the 1st of April and it took nearly 2 weeks for this to get delivered only for it to seemingly not work or be broken

woven mica Mar 12, 2020, 3:09 PM

#

You need to change the pin numbers according to the shield you have

stable raven Mar 12, 2020, 3:10 PM

#

I've tried each one

#

One gives me glitchy results, the rest gives me a white screen.

north stream Mar 12, 2020, 3:16 PM

#

You probably need to choose the right controller and resolution as well.

stable raven Mar 12, 2020, 3:17 PM

#

I've tried all of that. I've tried changing 0x9325 to the other stuff, same result (1 that gave me buggy results, the rest gave me a white screen)

#

This is all I get from 0x9325

📎 IMG_20200312_152024.jpg

#

And this is what I get when trying to fill the screen

📎 IMG_20200312_152355.jpg

#

At this point the only thing I can think of is that its broken in some way

stable raven Mar 12, 2020, 3:56 PM

#

anyone?

cedar mountain Mar 12, 2020, 4:18 PM

#

Have you tried tft.readID() in order to verify what sort of screen you have?

stable raven Mar 12, 2020, 4:39 PM

#

That gives me "26633"

north stream Mar 12, 2020, 4:47 PM

#

Looks like the "fill green" is working. Screen starts with random data (normal), then green fills as much as it thinks there's room. Might need to set the resolution so the "fill green" knows how big the screen actually is.

stable raven Mar 12, 2020, 4:48 PM

#

how do I do that?

north stream Mar 12, 2020, 4:55 PM

#

tft.setAddrWindow()?

stable raven Mar 12, 2020, 4:56 PM

#

"no matching function for call to 'Adafruit_TFTLCD::setAddrWindow()'" when compiling

#

wait nvm i got the arguments wrong

#

yes! that seems to have fixed it

#

thank you @north stream

#

but i did just realize there's a dead pixel REEE

north stream Mar 12, 2020, 4:59 PM

#

That's annoying (but common on cheap displays), but hopefully not a show-stopper for your project.

stable raven Mar 12, 2020, 5:13 PM

#

na it's fine

#

is there anything similar for touch? It seems that it only recognizes touch on x:1023 (y seems fine)

#

nvm seems like I was using the wrong example

stable raven Mar 12, 2020, 6:01 PM

#

another question, how should I use setAddrWindow()?

Do I do it like:
setAddrWindow(0,0,320,240)? (320 and 240 being the width and height respectively)

Or a different way?

I ask because I'm having some issues with text being cut off on the screen.

north stream Mar 12, 2020, 6:08 PM

#

I think it's inclusive, so 320 pixels would be 0 to 319

stable raven Mar 12, 2020, 7:11 PM

#

seems like fill works fine, but stuff like test and lines dont

#

graphicstest is extremely buggy and the only test that worked fine was the fill test

#

tft.setAddrWindow(0,0,240,320);
this is according to the store page (tft.width() and tft.height() give completely different results which also don't work)

cerulean verge Mar 12, 2020, 7:44 PM

#

Hello, guys.

I am trying to make a drum machine with arduino, mosfet and solenoids and I found these: https://www.youtube.com/watch?time_continue=17&v=pOi2FUBZz5A&feature=emb_title I believe these are servo motors, yes? And what voltage would be enough to strike drum as in the video?

YouTube

Liat Segal

Robotic drums: Motors and Sticks

http://liatsegal.blogspot.com

▶ Play video

#

Thank you!

cedar mountain Mar 12, 2020, 8:46 PM

#

It's not really a voltage question per se. Motor gearing, power, current, etc. matter too.

cedar mountain Mar 12, 2020, 9:38 PM

#

But yes, those are servo motors. I can't see a part number in the project notes, so it's hard to estimate how much power or torque they require.

north stream Mar 12, 2020, 9:59 PM

#

Servos generally run on 5V, and take a control signal to tell them which position to move to.

cerulean verge Mar 12, 2020, 10:27 PM

#

I see. But I wonder if 5V could strike so hard?

runic yacht Mar 13, 2020, 12:45 AM

#

I've got an Adafruit vl6180x distance sensor working on an Itsy Bitsy 32u4 (5v). It works great when connected to my laptop and the Arduino serial monitor is open. But it does nothing when I connect it to an external power source or even connected to my computer without the Arduino serial monitor running. What could I be doing wrong here?

north stream Mar 13, 2020, 2:15 AM

#

Some code waits for the serial port be be open before starting.

runic yacht Mar 13, 2020, 2:21 AM

#

I suspected that and tried to comment anything that referenced communication, but somehow the code still wanted a serial connection. I was wondering if the library for the VL6180x necessarily needs serial to work.

#

Here's a video of my contraption in action. It's a cup-detection circuit for a cocktail robot I'm building. https://photos.app.goo.gl/kauKJ76xuug7ckdb9

Google Photos

New video by Donald Bell

fallen linden Mar 13, 2020, 2:25 AM

#

@runic yacht Did you also comment out the serial.begin() in setup?

runic yacht Mar 13, 2020, 3:43 AM

#

I'll give it another go and see what happens. Thanks Jack. It's reassuring just to hear I was maybe on the right track.

digital stump Mar 13, 2020, 4:58 AM

#

Can anyone help me out please?

#

I've been spending all day trying to get AT commands to work on my Arduino nano

#

I can send the data but I don't see anything come back even though I configured everything according to this site: http://www.martyncurrey.com/hm-10-bluetooth-4ble-modules/#HM-10 - AT commands

Martyn Currey

Martyn

HM-10 Bluetooth 4 BLE Modules

wraith current Mar 13, 2020, 5:28 AM

#

@digital stump post a picture of how you have it wired up.

digital stump Mar 13, 2020, 6:43 AM

#

📎 IMG_20200313_024229.jpg 📎 IMG_20200313_024222.jpg

#

@wraith current

#

Following this Schematic but not getting any response In Serial Monitor

📎 HM-10_Circuit_001_800-595x400.png

north stream Mar 13, 2020, 12:37 PM

#

Looks like you're using RXD (instead of D9) as TX, and TXD (instad of D8) as RX. At a minimum, you'd need to swap them and change your software.

floral thicket Mar 13, 2020, 3:41 PM

#

Hey guys, I have the Adafruit RGB Shield Part 714 that has the 5 i2c pushbuttons on it, and I was wondering how I attach an interrupt to one of those buttons. I tried using the attachinterrupt command but it didn't seem to work

stable raven Mar 13, 2020, 3:45 PM

#

does anyone have an example of how to use getTextBounds?

#

the documentation just tells me what the arguments mean but that doesn't give me a clear idea of how I'm supposed to use it

cedar mountain Mar 13, 2020, 3:49 PM

#

@floral thicket You probably can't use interrupts there, since the buttons are only connected over I2C. They would need to be periodically polled for their status.

floral thicket Mar 13, 2020, 3:51 PM

#

Ok, that makes sense than as to why the existing prototype at work(which we have lost the code for) uses external buttons instead of the i2c ones

stable raven Mar 13, 2020, 4:01 PM

#

  if(c!='<'){
    str.concat(String(c));
  }
  else if(c=='<' && str.length()>2){
    str.remove(str.length()-1);
  }
  tft.setTextColor(WHITE,BLACK);
  tft.setCursor(0,0);
  tft.print(str);

Trying to find a faster way to clear text on the display. Currently I'm using the second argument of setTextColor to 'clear' the text which works fine for typing, but as you see I have an if statement that makes is so when the character < is sent, it should delete the last character in the string (backspace, essentially). When back spacing, it doesn't actually update the screen/text and causes some weird stuff to happen

#

(reason why I was asking about getTextBounds was because I was thinking about using it to just draw a black rectangle over the text rather than clearing the entire screen)

woven mica Mar 13, 2020, 5:16 PM

#

Just print the longer string with background color and then draw the string with removed character with text color?

floral thicket Mar 13, 2020, 7:44 PM

#

Any idea why using lcd.clear() in an interrupt is causing my code to freeze?

#

I am using the adafruit rgb shield library on an Uno R3 if that helps

north stream Mar 13, 2020, 7:48 PM

#

In general, interrupt service routines should complete quickly, and I'm guessing lcd.clear() has to write out data to the entire LCD buffer. You may be better off just having the ISR set a "clear request" sort of flag, and then the main loop call lcd.clear() if that flag is set.

surreal pawn Mar 13, 2020, 8:29 PM

#

doesn't the adafruit gfx library on samd try to use DMA to send pixels to the screen?

#

oh, I see you're not asking about any of those

elder hare Mar 14, 2020, 2:02 PM

#

so i have some dot led matrix (32 in total in series) that uses MAX7219 to drive each one! now using a short cable and using 3.3v on the ESP32 they all work fine and the text scrolls all the way.

The problems comes when i connect ESP32 and the dot led matrix to external PSU 5V 10A with common ground and CLK, DIN and CS on the ESP32. What happens is the text starts scrolling (from left) and about midway / at the end the text fades/goes away/ goes in and out with some of the matrix turning completely on and off and flickering :S

why could this be? to loong wires (CLK, DIN, CS) or a power issue? :S (the PSU is 10A so that should be way more then enough, as stated i can drive these directly from my ESP32 with 3.3V and no flickering and the text scrolls all the way through)...

north stream Mar 14, 2020, 2:48 PM

#

It could be that with a 5V supply, the 3.3V signal from the ESP32 is marginal to drive all the clock and latch inputs (the MAX7219 data sheet specifies a minimum of 3.5V). Perhaps try level shifters/buffers for the clock and latch signals?

sonic relic Mar 14, 2020, 4:44 PM

#

is their a type of IC that works like a potentiometer where i can change the output voltage through code instead of a twiting nob

cedar mountain Mar 14, 2020, 4:54 PM

#

Yep. "Digital potentiometers" are a thing. Or if you just want a voltage instead of a resistance, that's a DAC.

odd fjord Mar 14, 2020, 4:58 PM

#

for example -- https://www.adafruit.com/product/4286

Adafruit DS3502 I2C Digital 10K Potentiometer Breakout

If you're a person like me that gets exhausted turning knobs all day, the DS3502 is just the ticket to calm all your knob-turning related troubles. Instead of having to turn ...

sonic relic Mar 14, 2020, 5:39 PM

#

thanks for the help :)

elder hare Mar 14, 2020, 6:21 PM

#

i just recently got a ESP32 (had a ESP8266 befor) and on my ESP8266 i could send webrequests every second but on my ESP32 after receiving just 1 makes it stop receiving so like this (random)

POST
NO POST
NO POST
POST
POST
POST
NO POST

yea you get the idea and it is random sometimes i can send it 6 POST within 6 second...
to be clear, im sending POST requests TO my ESP32 via python

wraith current Mar 14, 2020, 7:23 PM

#

@elder hare esp32 can sometimes be strangely buggy compared to the 8266. Wifi joins can be sketchy, reading adc while using wifi sometimes just doesn't work, etc.. . .

elder hare Mar 14, 2020, 7:30 PM

#

@wraith current so i noticed :S is there a fix for this behaviour?

wraith current Mar 14, 2020, 7:31 PM

#

i don't know of one.

still mural Mar 14, 2020, 8:26 PM

#

Not sure if I should post in CP or Arduino but are there any differences in support for peripherals/libraries if I use a Crickit with Arduino instead of CP?

north stream Mar 14, 2020, 9:51 PM

#

I think both libraries support all the Crickit peripherals.

signal horizon Mar 15, 2020, 8:14 AM

#

hi, im new to arduino, i have a nano and i wired up a neopixel 8x8, put in the caps and resistors but im not getting any lights on

#

is there a debug command i should be looking for?

north stream Mar 15, 2020, 1:41 PM

#

There's not really a debug command, per se, since NeoPixels don't return any data. The Arduino has no way of even knowing if NeoPixels are there, it just sends the data stream.

#

So the problem reduces to finding out why nothing lights. One obvious possibility is a power supply problem. The other is the data stream: is it being sent, and is it being received?

grand lodge Mar 15, 2020, 4:13 PM

#

@signal horizon most helpful if you can give us a photo of your circuit (clear) and tell us what sample code you're using

stark mist Mar 15, 2020, 7:16 PM

#

@here I've been playing with the Clue and Raspberry pi BLEuart connection and I've found that for very small packets of bytes it seems to work quite well, however, once I get into streaming sensor data from the clue to the pi I'm hitting some kind of transmission error that introduces noise into my stream. I'm thinking about implementing checksums for each message as a way to determine if I should accept the message or not.

I wanted to check though and see if anyone had experienced this and if there is a smarter way around it, I was looking at the object transfer service but I cant find any exposing of that functionality in the ada fruit libraries, also frankly I'm not sure if that would solve my problem?

#

a tcp style connection that can validate the data packets and re-request dropped / corrupted

#

however if it gets that complicated I was thinking of just connecting the clue and pi via a uart cable instead of using the ble connection

burnt island Mar 15, 2020, 8:32 PM

#

I don't think the nordic UART service makes any consistency promises. If you want to get fancy you could break your sensors into separate BLE characteristics and subscribe to them from the Pi. You might miss individual sensor updates but you shouldn't have any corruption

#

IIRC the nordic UART service is made of two characteristics, one read and one write. The read/send characteristic hold the latest character "sent" from the Clue and gets read by the other device (Pi) at some point, but there is no indication of if that value had been read or not

#

so, as you're seeing it's possible to change the "send" byte before anything gets a chance to read the old value

stark mist Mar 15, 2020, 8:48 PM

#

I think that makes sense as mostly I'm seeing missing characters

#

I'm also refactoring my approach to deal with sending each sensor as updates only a few bytes long

signal horizon Mar 16, 2020, 4:28 AM

#

@grand lodge it was my cap, I got the wrong kind, 10v and it needs 6.3v

grand lodge Mar 16, 2020, 4:34 AM

#

yay glad you fixed it !

signal horizon Mar 16, 2020, 4:39 AM

#

Is there a command line application that I can use for Sr ding commands? I’m trying to find a way to make something to send a command for a text string and have it displayed on my LED matrix

fiery lichen Mar 16, 2020, 1:05 PM

#

Is there a technical term for a circuit that turns 3.7v into 5v? I know Adafruit calls them powerboost, but if I’m looking for a higher current one on other sites, what would I search for?

odd fjord Mar 16, 2020, 1:09 PM

#

I believe you are looking for a "boost" converter

north stream Mar 16, 2020, 1:23 PM

#

Pololu calls them boost regulators, another possibility

cinder knoll Mar 16, 2020, 1:23 PM

#

Has anyone powered an Arduino from a lightbulb socket?

#

I am seeking to make my own smart bulb using an Arduino

north stream Mar 16, 2020, 1:24 PM

#

You basically need a small power adapter to step down the voltage. There used to be chips available to do that, but they weren't very safe and I don't think they're made any more.

#

@signal horizon I'm also glad you got it working, but normally you can use a 10V capacitor where a 6.3V one was, with no problems.

signal horizon Mar 16, 2020, 1:25 PM

#

Hmmm

cinder knoll Mar 16, 2020, 2:18 PM

#

https://youtu.be/DkJ1f5UIuak

Can someone help direct me what I should read into to understand the decisions he is making in this video with his circuits?

YouTube

GreatScott!

DIY WiFi RGB LED Lamp || ESP8266 & Blynk

Support me for more videos: https://www.patreon.com/GreatScott
Previous video: https://youtu.be/ZAqNKaX3LQ0
Facebook: https://www.facebook.com/greatscottlab
Twitter: https://twitter.com/GreatScottLab
More project information (schematic, code, parts list,...) on Instructables:...

▶ Play video

north stream Mar 16, 2020, 2:20 PM

#

I might be able to help you with this, but which decisions are you curious about?

cinder knoll Mar 16, 2020, 2:24 PM

#

I want to design something similar. However it would drive two different series of LED strips

#

So when I watched how he designed he circuit. I was curious as to why he chose certain components for each

#

He did explain why he built the smaller circuit to smooth out the voltage. I understand why he built it, but not what conclusions he made to determine how he would design such a circuit

#

My goal is to use an esp8266, powered from usb or dc, and be able to turn on and off a white led strip and a uv led strip so that I can have a smart bulb to display an artwork that can be seen in both uv and visible light

#

I believe, since the esp8266 can only drive so much current from it's 3.3v pin. I would have to passthru power from the wall, and control a switch or gate with the esp8266 in order to turn on and off the circuit

north stream Mar 16, 2020, 2:43 PM

#

Ah, so you're looking for at least two things: one on how filters are designed, and one on how to control LED power from the mains.

#

There are two basic approaches for controlling mains-powered devices. One is to simply use mains powered devices with their own power supplies that are designed to plug into the wall, and switch power to them. This can be done with relays, optically isolated triacs, or ready built modules.

#

The other is to have a power supply that converts the mains voltage into something the LEDs can use (such as 5V DC or 12V DC), and then switch that power to the LEDs (generally using a transistor).

#

This writeup might be useful to you, describing how different filter components affect the amount of ripple in the resulting power https://learnabout-electronics.org/PSU/psu12.php

glass vapor Mar 16, 2020, 5:31 PM

#

Hello! I have a quick question. An Esp32 can run off of micro python. Can I use the esp32 by itself or does it have to be with an arduino?

north stream Mar 16, 2020, 5:43 PM

#

Yes, you can use it by itself.

glass vapor Mar 16, 2020, 5:47 PM

#

Alright, awesome

viscid ether Mar 16, 2020, 8:54 PM

#

hi, i need some help with this

#

i have 2 adafruit tcs34725 sensors, and i cant get them both to work in the same arduino, because they have the same i2c adress. how would i fix that?

cedar mountain Mar 16, 2020, 9:04 PM

#

Easiest way would be to use a software-I2C library to get a second bus, if your Arduino has only one to start with.

viscid ether Mar 16, 2020, 9:05 PM

#

what library do you recommend for having more than one bus? i had that idea, but couldnt find any

cedar mountain Mar 16, 2020, 9:11 PM

#

Don't have any personal experience with one, but it looks like there are a number out there, just searching for "Arduino software I2C".

viscid ether Mar 16, 2020, 9:11 PM

#

ok. thanks for your help

north kelp Mar 16, 2020, 11:14 PM

#

@viscid ether @cedar mountain Another option is to use Adafruit's I2C Multiplexer:
https://www.adafruit.com/product/2717

TCA9548A I2C Multiplexer

You just found the perfect I2C sensor, and you want to wire up two or three or more of them to your Arduino when you realize "Uh oh, this chip has a fixed I2C address, and from what I ...

cedar mountain Mar 16, 2020, 11:19 PM

#

Good point, thanks!

lusty bear Mar 17, 2020, 4:19 AM

#

Hi. Im trying to program a custom board of samd21 with a m0 bootloader. In the tutorial the bootprotect is set to 0x07. But in the new version of atmel studio, it didnt show any address at the bootprotect instead the dropdown menu shows byte size.. so what size should I pick?

cedar mountain Mar 17, 2020, 4:49 AM

#

The 0x07 value seems to correspond to a bootloader size of 0, i.e. no protection.

lusty bear Mar 17, 2020, 4:55 AM

#

How about 0x02? What is the size? @cedar mountain

cedar mountain Mar 17, 2020, 5:01 AM

#

Looks like 8KB.

lusty bear Mar 17, 2020, 5:01 AM

#

Okay thank you Ed

cedar mountain Mar 17, 2020, 5:01 AM

#

Table 21-2 in the SAMD21 datasheet if you want to double-check.

lusty bear Mar 17, 2020, 5:16 AM

#

Cheers Ed thank you and stay safe amid this covid pandemic.

cedar mountain Mar 17, 2020, 5:50 AM

#

Heh heh, I have just over an hour before a "shelter in place" order goes into effect for my area. Last chance to party! 😉

calm crown Mar 17, 2020, 9:38 AM

#

someone knows what this means?

📎 unknown.png

north stream Mar 17, 2020, 1:11 PM

#

It means to print out the contents of the PORTB register (which describes a group of GPIO pins) in binary.

pine bramble Mar 17, 2020, 3:45 PM

#

Can anyone help me with my arduino alarm clock

#

I'm having probs opening serial port to upload

north stream Mar 17, 2020, 5:26 PM

#

You mean, uploading a sketch via the serial port?

reef pollen Mar 18, 2020, 4:02 AM

#

If I'm not mistaken some UNO use a 16u2 and some use a ch340g as serial converters?
Do you think there's an efficiency drop when comparing an external hardware serial ch340, ft232r, etc to the internal of a 32u4?
I would wager that the external chips have to transfer the data over ftdi? spi? while the 32u4 probably has an internal serial memory buffer.

The reason I ask is enabling serial debugging on my project works on my promicro (32u4). On a nano (ch340), the serial seems to be taking longer and slowing the loop down considerably to the point where my project timing fails. (reading a gamecube controller. kind of timing specific)

Just wondering if its a serial effiecneny thing, or if the 328p with ch340 should be fast enough and theres something else wrong.

#

next step for me I think it to hook up my data analyzer or my scope and test timing, but I don't own a nano, trying to debug my program for someone else's hardware. Going to test on my UNO rev1

#

If Yall have any personal anecdotes about projects working on different types of boards, or info about how the 328p commicates with external converts, or anything that might be helpful for me to find the answer myself, I'd appreciate it!

#

</wall-of-text>

calm crown Mar 18, 2020, 10:53 AM

#

@north stream but what means the BIN

odd fjord Mar 18, 2020, 10:56 AM

#

@calm crown it sets the output format -- in this case binary, see this page https://www.arduino.cc/reference/en/language/functions/communication/serial/println/

calm crown Mar 18, 2020, 10:56 AM

#

so the language it has to type?

#

here its binairy

#

but it could be decimal too

odd fjord Mar 18, 2020, 10:57 AM

#

the default is decimal so you don;t have to specify it or you can use DEC

calm crown Mar 18, 2020, 10:57 AM

#

i think i get it, but i'll just have to test it out and see what it types in my serial monitor

#

Thanks GWeniPopcorn

odd fjord Mar 18, 2020, 10:58 AM

#

Serial.println(PORTB) is same as Serial.println(PORTB,DEC)

#

You're welcome -- good luck!

north stream Mar 18, 2020, 12:53 PM

#

@reef pollen I'm guessing something else is wrong: all the USB to serial adapter chips are capable of keeping up just fine even at 115,200kbps.

#

There could, theoretically, be some sort of problem with the USB driver on the host side, but all the problems I've seen with host driver issues have been of the "I can't talk to the board" sort, not speed/latency/delay issues.

reef pollen Mar 18, 2020, 1:03 PM

#

@north stream I just wonder if one chip takes up more cpu cycles (for Serial.write) compared to the others.

lunar yew Mar 18, 2020, 3:04 PM

#

https://skribbl.io/?14o44H2sv8Hj

skribbl.io - Free Multiplayer Drawing & Guessing Game

Skribbl.io a free multiplayer drawing and guessing game. Draw and guess words with your friends and people all around the world! Score the most points and be the winner!

north stream Mar 18, 2020, 3:20 PM

#

@reef pollen No, the main CPU just sends serial data to the USB-serial chip (whatever it is).

#

Except for boards like the 32U4 ones where the main CPU also serves as the USB-serial link (I'm not very sure what the serial impact is on those chips, but I would expect it to be small, as it's probably still hardware based).

ripe hedge Mar 18, 2020, 3:49 PM

#

Any idea where I can get nuts that fit the adafruit encoder? I have a bunch of pots that don't have nuts and they are kind of useless without them. I looked up the size and bought these but they are way too big https://www.amazon.com/dp/B07BV37JBY/ref=cm_sw_r_fm_apa_i_iZzCEbXVKZRVN

cedar mountain Mar 18, 2020, 4:03 PM

#

According to the datasheet you want M7 nuts.

reef pollen Mar 18, 2020, 4:04 PM

#

Don't forget about thread pitch.

#

1.0 1.25 1.5 etc

cedar mountain Mar 18, 2020, 4:06 PM

#

M7 x 0.75, sorry.

narrow thorn Mar 18, 2020, 4:36 PM

#

Did people know that Arduino has a cert? https://store.arduino.cc/digital/cert_fundamentals

Arduino Digital Store

The official Arduino store for digital products. Browse online services and explore digital plans and platforms integrated with Arduino family.

#

I'm not sure on it's usefulness, but cool to see.

signal horizon Mar 18, 2020, 6:18 PM

#

anybody know of a better 8 point font for neopixel? the default one is kind of messed up. T's are like an underlined T

#

theres a line at the bottom, looks like a capital i in some ways

signal horizon Mar 18, 2020, 10:53 PM

#

turns out it was the zigzag directive messing things up

north stream Mar 19, 2020, 2:57 AM

#

Good job figuring that one out, that sounds subtle and annoying.

hollow night Mar 19, 2020, 4:50 AM

#

Any nifty PID codebase in Arduino yet ? I am trying to control windshield wiper motor for set point of tidal volume in home brew ventilator with a medical grade analog pressure sensor.

lost nest Mar 19, 2020, 4:59 AM

#

What is the intended purpose of the ventilator? Are you just doing it as a fun experiment to see what it's like to build one?

cedar mountain Mar 19, 2020, 5:06 AM

#

I presume this is a crowdsourced coronavirus response design.

lost nest Mar 19, 2020, 5:06 AM

#

Yeah, so I'd highly encourage anyone who wants to work on that to first read: https://en.wikipedia.org/wiki/Therac-25

Therac-25

The Therac-25 was a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 and Therac-20 units (the earlier units had been produced in partnership with CGR of France).
It was involved in at least six accident...

hollow night Mar 19, 2020, 5:25 AM

#

This is part of world wide efforts from over 16k folks so far. (More at https://www.facebook.com/groups/670932227050506/ ). My effort will be using NXPs MP3V5010G (with range 0-1.45 psi, with analog output) as the initial sensor candidate for the open source emergency ventilator when the medical grade ones run out.

#

It will be refind/iterated on with high end DAQ card testing and LabVIEW.

#

What is the intended purpose of the ventilator? Are you just doing it as a fun experiment to see what it's like to build one?
@lost nest To give people who are turned away a chance.

#

📎 Screenshot_20200318-222804_Slack.jpg

#

📎 Screenshot_20200318-200730_Chrome.jpg

#

I presume this is a crowdsourced coronavirus response design.
@cedar mountain Indeed.

lost nest Mar 19, 2020, 5:55 AM

#

I'm sure there are libraries available, PID control is a pretty common thing. The big thing that I would advise is getting as much input as you can about what could be harmful to the patient, and incorporating hardware lockouts to prevent them. And also making sure you can detect when the system stops working.

#

Commercial life-support hardware/software is held to an incredibly high standard of testing and quality, and it seems to me like what you're trying to do could be done by a person manually squeezing the bag

#

So you will want to make sure that what you end up making isn't worse than just having a person do it.

hollow night Mar 19, 2020, 5:58 AM

#

So you will want to make sure that what you end up making isn't worse than just having a person do it.
@lost nest the record for a human doing it is four days. We need this done for 2ish weeks for potentially hundreds of thousands of people.

sage anvil Mar 19, 2020, 11:04 AM

#

i made a small code with the keyboard library for an atmega32u4 chip

#

its using pin 11 as a pullup but no matter what state its in it just types

#

and now it wont work at all

north stream Mar 19, 2020, 12:40 PM

#

Keyboard or keypad? Is this using HID code on the USB side?

pine bramble Mar 19, 2020, 1:45 PM

#

im making a arduino mouse with a pro micro but i want the the cursor in the middle when the joystick is in the middle can someone help me?

#

heres the code

#

#include <Mouse.h>
int horzPin = A0;
int vertPin = A1;
int selPin = 9;

int vertZero, horzZero;
int vertValue, horzValue;
const int sensitivity = 100;
int mouseClickFlag = 0;

//int invertMouse = 1;
int invertMouse = 1;

void setup()
{
pinMode(horzPin, INPUT);
pinMode(vertPin, INPUT);
pinMode(selPin, INPUT);
digitalWrite(selPin, HIGH);
delay(1000);
vertZero = analogRead(vertPin);
horzZero = analogRead(horzPin);

Mouse.begin(); //Init mouse emulation
}

void loop()
{
vertValue = analogRead(vertPin) - vertZero;
horzValue = analogRead(horzPin) - horzZero;

if (vertValue != 0)
Mouse.move(0, (invertMouse * (vertValue / sensitivity)), 0);
if (horzValue != 0)
Mouse.move((invertMouse * (horzValue / sensitivity)), 0, 0);

if ((digitalRead(selPin) == 0) && (!mouseClickFlag))
{
mouseClickFlag = 1;
Mouse.press(MOUSE_LEFT);
}
else if ((digitalRead(selPin)) && (mouseClickFlag))
{
mouseClickFlag = 0;
Mouse.release(MOUSE_LEFT);
}
}

north stream Mar 19, 2020, 1:59 PM

#

A mouse is a "relative" device, it just sends how far to move and in what direction, it doesn't set the cursor position directly. Normally joysticks are set up so the middle position is "don't move" and other positions send move information in various directions.

pine bramble Mar 19, 2020, 2:05 PM

#

sorry im not goood at coding

#

can you put a button that makes it go to the middle

#

thanks

#

@north stream

north stream Mar 19, 2020, 2:12 PM

#

Makes what go to the middle? Is there a screen somewhere? What kind of screen? How is it hooked up?

pine bramble Mar 19, 2020, 2:12 PM

#

oh

#

the cursor

#

oh

#

its just a joystick connected to a pro micro and when it is connected to the computer, it acts like a mouse

#

its a windows 10 pc

#

and connected by usb

north stream Mar 19, 2020, 2:15 PM

#

Unfortunately, there's no way for a mouse to know where the cursor on a PC is, so it doesn't know which way to move to put the cursor at the middle. You would need some other kind of device besides a mouse to do things like set the cursor position to a specific location.

pine bramble Mar 19, 2020, 2:16 PM

#

shoot

#

thanks for helping though

north stream Mar 19, 2020, 2:17 PM

#

It looks like there may be a way to make a mouse device work in "absolute" mode where you can set a specific position, but it looks complicated https://forum.arduino.cc/index.php?topic=94140.0

pine bramble Mar 19, 2020, 2:18 PM

#

im kinda confused

#

so what makes the mouse move

north stream Mar 19, 2020, 2:19 PM

#

Like I said, a mouse is normally a "relative" device. Moving the mouse down and to the left sends commands to the computer to move in that direction.

pine bramble Mar 19, 2020, 2:20 PM

#

ok

#

i get it

north stream Mar 19, 2020, 2:20 PM

#

The mouse has no way of knowing where the cursor currently is, it just says which way to move it from its current position (whatever that is)

pine bramble Mar 19, 2020, 2:20 PM

#

can you make the mouse go in the middle in this code?

#

void setup(){
}

void loop(){
for(int y = 1; y <= 100; y++){
for(int x = 1; x <= 100; x++){
delay(100);
Mouse.move(x, y);
}
}
}

north stream Mar 19, 2020, 2:22 PM

#

Nope, that code will just move the mouse in an increasing zigzag.

pine bramble Mar 19, 2020, 2:22 PM

#

ok

north stream Mar 19, 2020, 2:22 PM

#

To move the cursor to a specific place, you'd need an "absolute" pointing device like a graphics tablet instead of a mouse.

pine bramble Mar 19, 2020, 2:22 PM

#

can you not loop that

#

ohhhhhhh i get it

#

but on this page(https://forum.arduino.cc/index.php?topic=94140.0) there is a HID.cpp

USB Absolute Mouse Mode

#

what is that hid.cpp file

north stream Mar 19, 2020, 2:24 PM

#

Right, that appears to be a way to operate the mouse in absolute mode, but it looks complicated. That file is part of the Arduino code itself.

pine bramble Mar 19, 2020, 2:24 PM

#

ok im gonna try it then

north stream Mar 19, 2020, 2:25 PM

#

Like it says, make a backup copy of the file before you change it.

pine bramble Mar 19, 2020, 2:25 PM

#

ok

#

how do you use the cpp file

#

nvm

#

will this work?

#

#include <Mouse.h>
int horzPin = A0;
int vertPin = A1;
int selPin = 9;
int middle = 8;

int vertZero, horzZero;
int vertValue, horzValue;
const int sensitivity = 400;
int mouseClickFlag = 0;

//int invertMouse = 1;
int invertMouse = 1;

void setup()
{
pinMode(horzPin, INPUT);
pinMode(vertPin, INPUT);
pinMode(selPin, INPUT);
digitalWrite(selPin, HIGH);
delay(1000);
vertZero = analogRead(vertPin);
horzZero = analogRead(horzPin);

Mouse.begin(); //Init mouse emulation
}

void loop()
{
vertValue = analogRead(vertPin) - vertZero;
horzValue = analogRead(horzPin) - horzZero;

if (vertValue != 0)
Mouse.move(0, (invertMouse * (vertValue / sensitivity)), 0);
if (horzValue != 0)
Mouse.move((invertMouse * (horzValue / sensitivity)), 0, 0);

if ((digitalRead(selPin) == 0) && (!mouseClickFlag))
{
mouseClickFlag = 1;
Mouse.press(MOUSE_LEFT);
}
else if ((digitalRead(selPin)) && (mouseClickFlag))
{
mouseClickFlag = 0;
Mouse.release(MOUSE_LEFT);
}

if (digitalRead(middle) == 0)
{
Mouse.move(100,100);
delay(1000);
Mouse.move(50,50);

}

#

@north stream

north stream Mar 19, 2020, 2:42 PM

#

I don't think so. It looks like a mix of relative and absolute modes.

pine bramble Mar 19, 2020, 2:42 PM

#

i have the .cpp file installed

#

it says it needs platform.h

#

but i think that got removed

north stream Mar 19, 2020, 2:42 PM

#

You might be able to stay with relative mode and send moves so far that you know the cursor is stuck in a corner (so you know where it is) then send moves to send it from there to the middle of the screen. It might look goofy, but it could work.

pine bramble Mar 19, 2020, 2:43 PM

#

thats what i did

#

Mouse.move(100,100);
delay(1000);
Mouse.move(50,50);

north stream Mar 19, 2020, 2:43 PM

#

Ah. Does it work?

pine bramble Mar 19, 2020, 2:43 PM

#

no

north stream Mar 19, 2020, 2:43 PM

#

I'm used to computer screens being higher resolution than 100x100.

pine bramble Mar 19, 2020, 2:44 PM

#

no

#

the 100

#

its like a map on your screen so no matter what, 100,100 is the corner

north stream Mar 19, 2020, 2:45 PM

#

A, that would be absolute mode, and B, I don't think they're percentages

pine bramble Mar 19, 2020, 2:45 PM

#

oh

#

ok

north stream Mar 19, 2020, 2:45 PM

#

However, it's possible to find out. What does happen when you click the middle button?

pine bramble Mar 19, 2020, 2:45 PM

#

i cant upload it

#

because it says it needs platform.h

#

but people say that that libary got removed

north stream Mar 19, 2020, 2:46 PM

#

Did you change hid.cpp?

pine bramble Mar 19, 2020, 2:46 PM

#

no

#

you just paste it into the directory

north stream Mar 19, 2020, 2:47 PM

#

Delete that file.

pine bramble Mar 19, 2020, 2:48 PM

#

ok

north stream Mar 19, 2020, 2:48 PM

#

Now does it upload?

pine bramble Mar 19, 2020, 2:49 PM

#

yes

#

but im not sure if it works

#

let me get a button

#

real quick

#

it just keeps it in the corner

#

the cursor

#

@north stream how do you make the loop stop

#

if (digitalRead(middle) == 0)
{

Mouse.move(-50,-50);
delay(1000);
}

#

can you make that stop

#

because it just lops

#

loops

#

alright

#

im just not going to do that

#

i kinda give up

north stream Mar 19, 2020, 3:13 PM

#

Yeah, that means "move the cursor -50 pixels in the X direction and -50 pixels in the Y direction once a second for as long as the middle button is held down"

#

You probably want something like ```c
Mouse.move(-3000, -3000); // move cursor all the way to the corner
Mouse.move(640, 512); // move cursor from the corner to here

pine bramble Mar 19, 2020, 3:53 PM

#

yep and so how do you make that loop sop

#

stop

#

it just keeps on looping

north stream Mar 19, 2020, 4:13 PM

#

You could do something like wait until the button is released

pine bramble Mar 19, 2020, 5:09 PM

#

alright

patent cedar Mar 19, 2020, 8:13 PM

#

Hey guys, I am really new to programming and Arduino (using a ESP8266 but with Arduino IDE) and I am trying to home automate a TV lift. I already soldered two relais shields to the ESP8266 and am able to control them seperatly. Now I wanted to add the Alexa compatibility and it works with simple on/off like this:

`if ( (strcmp(device_name, "Lift1") == 0) ) {
if (state) {

      digitalWrite(D3, LOW);
      
      digitalWrite(D2, HIGH);
      Serial.printf("Lift1 moving up.");
    } else {
      
      digitalWrite(D3, LOW);

      digitalWrite(D2, HIGH);
      Serial.printf("Lift1 moving down.");`

now I want both relais turned off, before the next action starts, so that I can be sure that the two relais wont be on at the same time. after switching both to low I want to wait 5 seconds (delay), then switch one of the relais to high (either up or down) and after 45 seconds (approx how long the lift needs to fully go up or down), it should switch both relais to low again.

if ( (strcmp(device_name, "Lift1") == 0) ) { if (state) { delay(1000); digitalWrite(D2, LOW); digitalWrite(D3, LOW); delay(5000); digitalWrite(D2, HIGH); delay(45000); digitalWrite(D2, LOW); Serial.printf("Lift1 moving up."); } else { delay(1000); digitalWrite(D2, LOW); digitalWrite(D3, LOW); delay(5000); digitalWrite(D3, HIGH); delay(45000); digitalWrite(D3, LOW); Serial.printf("Lift1 moving down."); } }

I tried it like this but it only switches both off and nothing happens afterwards :/

north stream Mar 19, 2020, 8:21 PM

#

What is this if statement inside? The loop?

sage anvil Mar 19, 2020, 8:25 PM

#

Keyboard, its only for 1 button

patent cedar Mar 19, 2020, 8:28 PM

#

it is in a fauxmo function. it just check whether I said to turn "on" or "off"

north stream Mar 19, 2020, 8:34 PM

#

There's not much to go wrong, it seems like either it's not getting called, or the strcmp() is failing.

patent cedar Mar 19, 2020, 8:41 PM

#

well I didnt change the function from step 1 to step 2 though

#

so it cant be that strcmp is failing and the text is even output in the serial monitor

#

so the if statement is running till the end

north stream Mar 19, 2020, 9:10 PM

#

The first time, or the second time?

#

You could simplify it too: ```c
if (strcmp(device_name, "Lift1") == 0) {
delay(1000);
digitalWrite(D2, LOW);
digitalWrite(D3, LOW);
delay(5000);
digitalWrite(state ? D2 : D3, HIGH);
delay(45000);
digitalWrite(D2, LOW);
Serial.printf("Lift1 moving ");
Serial.printf(state ? "up" : "down");
}

patent cedar Mar 19, 2020, 10:14 PM

#

both

#

with your code the same - serial monitor outputs "Lift1 moving up" but nothing happens

#

both relais stay off

north stream Mar 19, 2020, 10:24 PM

#

Curious.

patent cedar Mar 19, 2020, 10:28 PM

#

very confusing 😩

tender bronze Mar 19, 2020, 11:10 PM

#

Hello anyone has worked with AMG8833 IR Thermal Camera for see in a 2.4TFT touchscreen V2.1_9341? I cant understand how work the data. I use the rinkydinky library for touchscreen and the Adafruit_AMG88xx library for thermal camera.

wraith current Mar 19, 2020, 11:11 PM

#

@patent cedar maybe your relays are using too much power. digital pins can only supply a little current.

patent cedar Mar 19, 2020, 11:11 PM

#

but they are working flawlessly with the first test

#

if ( (strcmp(device_name, "Lift1") == 0) ) {
if (state) {

      digitalWrite(D3, LOW);
      
      digitalWrite(D2, HIGH);
      Serial.printf("Lift1 moving up.");
    } else {
      
      digitalWrite(D3, LOW);

      digitalWrite(D2, HIGH);
      Serial.printf("Lift1 moving down.");

this code works

wraith current Mar 19, 2020, 11:16 PM

#

so it gets stuck at delay(45000) ?

patent cedar Mar 19, 2020, 11:16 PM

#

i just tried 1000

#

and it does the same .. what is this ....

wraith current Mar 19, 2020, 11:17 PM

#

Put some Serial.print lines in at each line to see exactly which line it's getting stuck at.

patent cedar Mar 19, 2020, 11:19 PM

#

well it outputs the very last line "Lift moving up."

#

so it shouldnt get stuck anywhere but one sec

wraith current Mar 19, 2020, 11:21 PM

#

you can user Serial.println("blah"); and it'll make each print a new line.

patent cedar Mar 19, 2020, 11:22 PM

#

00:22:23.538 -> [MAIN] Device #0 (Lift1) state: ON value: 255
00:22:23.538 -> Both LOW.D2 HIGH.D2 LOW.Lift1 moving up.[MAIN] Device #0 (Lift1) state: ON value: 254
00:22:23.740 -> Both LOW.D2 HIGH.D2 LOW.Lift1 moving up.

#

even though I have delay 1000 in the code it doesnt wait 1000

#

delay(1000); digitalWrite(D2, LOW); digitalWrite(D3, LOW); Serial.printf("Both LOW."); delay(1000); digitalWrite(D2, HIGH); Serial.printf("D2 HIGH."); delay(1000); digitalWrite(D2, LOW); Serial.printf("D2 LOW."); Serial.printf("Lift1 moving up.");

wraith current Mar 19, 2020, 11:34 PM

#

`

#

`
Serial.println("delay 1000");
delay(1000);

Serial.println("D2 low");
digitalWrite(D2, LOW);

Serial.println("D3 low");
digitalWrite(D3, LOW);

Serial.println("delay 1000");
delay(1000);

Serial.println("D2 HIGH");
digitalWrite(D2, HIGH);

Serial.println("delay 1000");
delay(1000);

Serial.println("D2 LOW");
digitalWrite(D2, LOW);
Serial.printf("Lift1 moving up.");
`

#

try it like that.

twilit hare Mar 20, 2020, 3:25 AM

#

hey... was wondering if anyone knew of an RTC libraries for the SAMD51 (Grand Central). I just picked one up the other day, and am in the process of porting my code from my SAMD21.... but the RTC lib doesn't work!!! I guess I can hack something together if I can't find anything...

north stream Mar 20, 2020, 3:38 AM

#

Weird, it's just an I2C peripheral

lost nest Mar 20, 2020, 4:03 AM

#

@twilit hare When you say 'doesn't work' what do you mean?

twilit hare Mar 20, 2020, 4:06 AM

#

@lost nest I'm attempting to use the internal RTC (since the Grand Central has a 32K crystal already attached). The code that I've been using with my M0 Feather is the RTC Zero code (https://github.com/arduino-libraries/RTCZero)... I get compile errors when I try to compile the code against the SAMD51.

#

I could use an external RTC (I've got a few lying around...).... but trying to shoot for a minimalist approach

lost nest Mar 20, 2020, 4:07 AM

#

Is it failing to compile, failing to execute, something else?

#

ah sorry missed your saying compile error

#

It is a different core processor

#

Even though they're both SAMD, it's one of their cortex-M4 vs cortex-M0. So some careful comparison of the peripheral sets will need to be done.

twilit hare Mar 20, 2020, 4:10 AM

#

yeah, I know. I was hoping that someone already created a library.... but, it looks like I'll either create one, or use an external RTC

lost nest Mar 20, 2020, 4:10 AM

#

It's possible it's the same core peripheral, but if the libraries for the M4 SAMD don't expose the necessary variables (e.g. https://github.com/arduino-libraries/RTCZero/blob/master/src/RTCZero.cpp#L46) then you'll either need to define those or find some other strategy.

GitHub

arduino-libraries/RTCZero

RTC Library for SAMD21 based boards. Contribute to arduino-libraries/RTCZero development by creating an account on GitHub.

#

It looks like someone already did this: https://github.com/ericbaril72/RTCZero/tree/SAMD51_E54

GitHub

ericbaril72/RTCZero

RTC Library for Arduino Zero and MKR1000. Contribute to ericbaril72/RTCZero development by creating an account on GitHub.

twilit hare Mar 20, 2020, 4:12 AM

#

yeah, I found that one... it's not compiling for me either. I'll take a closer look at it this weekend

#

could be user error

lost nest Mar 20, 2020, 4:12 AM

#

You're kind of deep into the underlying source structure for Arduino, which, IMO, isn't a great place to be.

#

I've never had a great time with their code structure, but also possibly just me.

twilit hare Mar 20, 2020, 4:13 AM

#

yeah... I'm 99% sure that I'll go with an external RTC, in order to keep my project moving along

lost nest Mar 20, 2020, 4:13 AM

#

Sticking with a known I2C peripheral helps a lot on portability

#

If you've got a project in mind, I also vote external RTC to make progress, you can always condense later if it becomes important

twilit hare Mar 20, 2020, 4:14 AM

#

yup. Thanks for spending a few minutes helping me to think this through!

lost nest Mar 20, 2020, 4:14 AM

#

happy to

lunar yew Mar 20, 2020, 9:17 AM

#

https://pnrtscr.com/gz5n0s?fbclid=IwAR0wRJDcKRZ6q.

Lightshot

Screenshot

Captured with Lightshot

sage anvil Mar 20, 2020, 11:41 AM

#

i made this for a small keypad and i used it before and it worked perfectly fine

📎 unknown.png

#

all of a sudden it doesnt matter what state the switches are itll output anyway

#

anyone know what could be wrong here

north stream Mar 20, 2020, 12:43 PM

#

Maybe move Keyboard.begin(); into setup() instead of loop()?

lean crypt Mar 20, 2020, 1:54 PM

#

Question for someone on the know with the MLX90393. The Adafruit library never actually sets speed for the I2C, is it changeable or does it just assume the speed of the controller?

#

/**
 * Initialises the I2C bus, and assigns the I2C address to us.
 *
 * @param i2caddr   The I2C address to use for the sensor.
 *
 * @return True if initialisation was successful, otherwise False.
 */
bool Adafruit_MLX90393::begin(uint8_t i2caddr){
    bool ok;

    switch(_transport) {
        case MLX90393_TRANSPORT_I2C:
            _wire->begin();
            _i2caddr = i2caddr;
            break;
        case MLX90393_TRANSPORT_SPI:
            /* Currently not handled due to HW layout. */
            break;
    }

    /* Set gain and sensor config. */
    ok = setGain(_gain);

    /* Set the initialised flag based on the I2C response. */
    _initialized = ok;

    return ok;
}

pine bramble Mar 20, 2020, 2:03 PM

#

can someone help me?

#

im trying to add a button to this code but it keeps on giving me errors

#

#include <Joystick.h>

Joystick_ Joystick;


int RxAxis_ = 0;                    
int RyAxis_ = 0;  
int RzAxis_ = 0;          
int Throttle_ = 0;         

const bool initAutoSendState = true; 

void setup()
{
      Joystick.begin();
  }
   
void loop(){
 
 
  
RxAxis_ = analogRead(A1);
 RxAxis_ = map(RxAxis_,0,1023,0,255);
 Joystick.setRxAxis(RxAxis_);
  
 RyAxis_ = analogRead(A2);
 RyAxis_ = map(RyAxis_,0,1023,0,255);
 Joystick.setRyAxis(RyAxis_);

 RzAxis_ = analogRead(A0);
 RzAxis_ = map(RzAxis_,1023,0,255,0);            
Joystick.setRzAxis(RzAxis_);
  
Throttle_ = analogRead(A3);
Throttle_ = map(Throttle_,1023,0,255,0);         
Joystick.setThrottle(Throttle_);                
   
delay (50);
}

lean crypt Mar 20, 2020, 2:29 PM

#

Can you post the error? also can you surround your code with ```

pine bramble Mar 20, 2020, 2:42 PM

#

alright

odd fjord Mar 20, 2020, 2:46 PM

#

@pine bramble please do not use the "everyone" tag --(even though it is disabled) -- in your code the last use of "Throttle" has an underscore at the end that does not belong.

pine bramble Mar 20, 2020, 2:47 PM

#

alright sorry

odd fjord Mar 20, 2020, 2:47 PM

#

oops never-mind - I did not see it is used above...

pine bramble Mar 20, 2020, 2:47 PM

#

lol

#

can you help me add a buutton into that code?

#

its connected to gound and pin 9

#

im using a pro micro

odd fjord Mar 20, 2020, 2:50 PM

#

there is a good exampleof how to read a button here https://www.arduino.cc/en/tutorial/button

pine bramble Mar 20, 2020, 2:51 PM

#

i dont want it to control a led though

#

I want it to give an input to the computer

#

im making a game controller

odd fjord Mar 20, 2020, 2:52 PM

#

its just an example -- you can do whatever you want once you detect the button press.

pine bramble Mar 20, 2020, 2:53 PM

#

i know that but I dont know how to code that button give an input

odd fjord Mar 20, 2020, 2:55 PM

#

I'm not sure what you mean by "give an input"

pine bramble Mar 20, 2020, 2:55 PM

#

give an input to the computer

odd fjord Mar 20, 2020, 2:56 PM

#

sorry -- I'm confused. I still don't really understand what you are trying to do.

pine bramble Mar 20, 2020, 2:56 PM

#

📎 arduino.PNG

#

I got all the analog inputs

#

but see all those red circles?

#

those are all buttons

#

and you can add up to 32 of them

#

also, what are these values?

#

Throttle_ = map(Throttle_,1023,0,255,0);

#

the 1023,0,255,0

odd fjord Mar 20, 2020, 3:02 PM

#

this bit of code will let you test the button - you need tadd code to do whatever you want to do when it is pressed or not pressed. You should be able to add this to your program```const int buttonPin = 9; // the number of the pushbutton pin

// variables will change:
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// The button is pressed
// do something here
} else {
// the button is not pressed
/// do something else here
}
}```

#

the numbers are converting the range of values so instead of going from 1023 to 0 the output value goes from 255 to 0

pine bramble Mar 20, 2020, 3:04 PM

#

alright

odd fjord Mar 20, 2020, 3:04 PM

#

so 1023 in gives 255 out, 512 in gives 128 out, 0 in gives 0 out.

pine bramble Mar 20, 2020, 3:04 PM

#

ok

odd fjord Mar 20, 2020, 3:05 PM

#

it is just "scaling" the input range to the output range.

pine bramble Mar 20, 2020, 3:05 PM

#

i get it

#

what if you want the button to just give an input

#

📎 arduino.PNG

#

so whenever you press the button, the red circle labeled "1" can light up

odd fjord Mar 20, 2020, 3:09 PM

#

also see the ;ink I posted -- you should be using a pull-up or pull-down resistor with the button

pine bramble Mar 20, 2020, 3:09 PM

#

ok

#

i did

#

also, for the x rotation and y rotation are the 2 pots on a joystick

#

but for some random reason everytime i calibrate it, there is an offset on the x rotation

#

so the plane turns to the left

odd fjord Mar 20, 2020, 3:15 PM

#

Hopefully someone else with more experience with analog inputs can help with that.

pine bramble Mar 20, 2020, 3:15 PM

#

oh ok

#

but back to the button situation

#

would it just be better to just make that button click the mouse

#

using the mouse.h

#

libary

odd fjord Mar 20, 2020, 3:17 PM

#

sorry -- that is not something I am familiar with.

pine bramble Mar 20, 2020, 3:20 PM

#

do you think this would work?

#

#include <Joystick.h>
#include <Mouse.h>


Joystick_ Joystick;

int selPin = 9; 
int RxAxis_ = 0;                    
int RyAxis_ = 0;  
int RzAxis_ = 0;          
int Throttle_ = 0;         

const bool initAutoSendState = true; 
int buttonState = 0; 
void setup()
{
       Serial.begin(9600);
       Joystick.begin();
       pinMode(selPin, INPUT);  
  }
   
void loop(){

buttonState = digitalRead(buttonPin);

RxAxis_ = analogRead(A1);
 RxAxis_ = map(RxAxis_,0,1023,0,255);
 Joystick.setRxAxis(RxAxis_);
  
 RyAxis_ = analogRead(A2);
 RyAxis_ = map(RyAxis_,0,1023,0,255);
 Joystick.setRyAxis(RyAxis_);

 RzAxis_ = analogRead(A0);
 RzAxis_ = map(RzAxis_,1023,0,255,0);            
Joystick.setRzAxis(RzAxis_);
  
Throttle_ = analogRead(A3);
Throttle_ = map(Throttle_,1023,0,255,0);         
Joystick.setThrottle(Throttle_);

                 if ((digitalRead(selPin) == 0) && (!mouseClickFlag))                                           
  {
    mouseClickFlag = 1;
    Mouse.press(MOUSE_LEFT);                                                                      
  }
  else if ((digitalRead(selPin))&&(mouseClickFlag))                                            
  {
    mouseClickFlag = 0;
    Mouse.release(MOUSE_LEFT);                                                                   
  }
 
delay (50);

}

odd fjord Mar 20, 2020, 3:23 PM

#

do you want AND or OR for the mouseClickFlag? I'm not sure I understand how the mouse and button work

pine bramble Mar 20, 2020, 3:24 PM

#

its alright

#

I got everything to work

odd fjord Mar 20, 2020, 3:25 PM

#

great!

pine bramble Mar 20, 2020, 3:25 PM

#

thanks a lot for your time

odd fjord Mar 20, 2020, 3:25 PM

#

You're welcome --- good luck with your project!

pine bramble Mar 20, 2020, 3:25 PM

#

thanks

#

i just made the joystick

#

now time for the panek

#

panel

#

that has 142 switches

#

thats gonna be a pain

pine bramble Mar 20, 2020, 8:56 PM

#

razzman

#

hi

floral thicket Mar 20, 2020, 8:57 PM

#

Lmao sorry for the long typing time. Was on the phone with somebody and that had me distracted while trying to word my help question in the right way

pine bramble Mar 20, 2020, 8:57 PM

#

oh lol

#

are you good in arduino analog settings

#

im having trouble calibrating my game controller

#

📎 arduino.PNG

floral thicket Mar 20, 2020, 8:57 PM

#

Im relatively new with Arduino. Just getting back into it because of a project with work.

pine bramble Mar 20, 2020, 8:58 PM

#

oh ok nvm

floral thicket Mar 20, 2020, 8:58 PM

#

Is it too sensitive? Not sure if there is a way to adjust gain on the stick

pine bramble Mar 20, 2020, 8:58 PM

#

no

#

see how the x rotation is a little offset?

floral thicket Mar 20, 2020, 8:59 PM

#

Ah, yeah. TBH Im not too sure of what it could be

pine bramble Mar 20, 2020, 8:59 PM

#

the z axis and y rotation are all in the center and the x rotation and y rotation are both connected to a joystick

#

the z axis is connected to nothing

#

and the z rotation and throttle are both pots

#

so the plane just likes to go to the left

#

ive been trying to solve this for 3 weeks

floral thicket Mar 20, 2020, 9:02 PM

#

Either potentially try a different joystick module, or what im seeing online is if the voltage source isnt stable enough it might lead to an inaccurate reading.

pine bramble Mar 20, 2020, 9:02 PM

#

no its 5c

#

5v

#

just like the joystick pinout says

#

and I dont have another one

floral thicket Mar 20, 2020, 9:02 PM

#

Via USB?

pine bramble Mar 20, 2020, 9:03 PM

#

mhm

#

im using a pro micro

floral thicket Mar 20, 2020, 9:04 PM

#

Maybe check to see the USB port on your computer is not in power saving mode or low power mode. It might not be pushing out the full 5V. Unless you checked with a multimeter and saw for sure that its 5V

pine bramble Mar 20, 2020, 9:04 PM

#

its not

#

mhm

#

its 5v

#

and the joystick works completly fine

#

here

#

#include <Joystick.h>


Joystick_ Joystick;

int RxAxis_ = 0;
int RyAxis_ = 0;
int RzAxis_ = 0;
int Throttle_ = 0;

const bool initAutoSendState = true;

void setup()
{
  Joystick.begin();
}

void loop() {



  RxAxis_ = analogRead(A1);
  RxAxis_ = map(RxAxis_, 0, 1023, 0, 255);
  Joystick.setRxAxis(RxAxis_);

  RyAxis_ = analogRead(A2);
  RyAxis_ = map(RyAxis_, 0, 1023, 0, 255);
  Joystick.setRyAxis(RyAxis_);

  RzAxis_ = analogRead(A0);
  RzAxis_ = map(RzAxis_, 1023, 0, 255, 0);
  Joystick.setRzAxis(RzAxis_);

  Throttle_ = analogRead(A3);
  Throttle_ = map(Throttle_, 1023, 0, 255, 0);
  Joystick.setThrottle(Throttle_);

  delay (50);
}

floral thicket Mar 20, 2020, 9:07 PM

#

Let me hook up my joystick to my arduino and check

#

Can you PM me your joystick library?

pine bramble Mar 20, 2020, 9:14 PM

#

alright

#

by fily

#

file

#

nvm

#

i sent you a friend request

#

my joytick is a thumb joystick

#

with 5 pins gnd, vcc, vrx, vry, and switch

#

@daring marsh can you help me?

#

@sour tide

sour tide Mar 20, 2020, 9:29 PM

#

@pine bramble please don't ping anyone unless it is a moderation issue. If you need help please explain the issue you are having and patiently wait for someone to help.

pine bramble Mar 20, 2020, 9:30 PM

#

oh sorry would you help me though

sour tide Mar 20, 2020, 9:31 PM

#

sorry, I don't know Arduino (I do CircuitPython)

pine bramble Mar 20, 2020, 9:31 PM

#

oh, thats alright thanks though

sour tide Mar 20, 2020, 9:32 PM

#

you can recap your problem though so that new folks don't need to read back to know where you are

pine bramble Mar 20, 2020, 9:32 PM

#

ok

sour tide Mar 20, 2020, 9:32 PM

#

you can also post on the Adafruit forums: https://forums.adafruit.com/

pine bramble Mar 20, 2020, 9:32 PM

#

right, thanks

pine bramble Mar 20, 2020, 9:57 PM

#

anyone has experience with ov7670?

floral thicket Mar 20, 2020, 9:59 PM

#

Can anybody help point me in the right direction for the code I need? I have the variable Greenscale, which is a percentage of a green LED to a white one. Greenscale = 100% means only the green LED, 0% means only the white one, with the in between values changing that relationship. The project needs the LEDs to fade on over a set period of time and maintain that relationship until a set brightness is reached.

north stream Mar 20, 2020, 10:03 PM

#

So whitescale = 100 - Greenscale?

#

Or do you need to do perceptual mapping, or your scales are floating point or something?

floral thicket Mar 20, 2020, 10:05 PM

#

I tried mapping whitescale to the inverse of greenscale, but I don't think I tried that. Let me give it a test.

pine bramble Mar 20, 2020, 10:10 PM

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whats greenscale?

floral thicket Mar 20, 2020, 10:11 PM

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Might actually have it named something different, but its just how green the output of the 2 LEDs are to simulate light further down in the water.

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So it seems like having the max brightness of the LED be negative causes the LED to behave oddly.

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Got it to work with some if commands to prevent the LEDs output value from being negative. Now just need to find out how to fade them on over a set period of time.

wraith current Mar 20, 2020, 10:42 PM

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@floral thicket I think you need to do a little diagram of the 3 endpoint cases and what values each led should be at those points. Endpoints being 0 brightness, 0-100 greenscale, 100 brightness+100 greenscale, and 100 brightness+0 greenscale.

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a for loop is usually how you would do fading of leds

floral thicket Mar 20, 2020, 10:54 PM

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@wraith current That will probably work out better using a for loop in the final code. My current test of it is a modification of the built in Fade example. What do you mean by diagram?

wraith current Mar 20, 2020, 11:02 PM

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just a little logic table sort of thing to help show what your equation should be doing.

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@floral thicket post your code and i'll take a look.

floral thicket Mar 20, 2020, 11:07 PM

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how do I format for code again?

wraith current Mar 20, 2020, 11:08 PM

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put it in backticks. the shift tilde key

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`

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er, not shift i mean .

floral thicket Mar 20, 2020, 11:08 PM

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That did not work

wraith current Mar 20, 2020, 11:08 PM

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hehe.

floral thicket Mar 20, 2020, 11:08 PM

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#include <Wire.h>
#include <SPI.h>
#include <Adafruit_RGBLCDShield.h>
#include <utility/Adafruit_MCP23017.h>

//using LCD Shield to output current brightness and Greenscale percent
Adafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield();
#define RED 0x1
#define YELLOW 0x3
#define GREEN 0x2
#define TEAL 0x6
#define BLUE 0x4
#define VIOLET 0x5
#define WHITE 0x7

const int Wled = 6;
const int Gled = 5;
int brightness = 0;     // how bright the LED is
int fadeAmount = 5;     // how many points to fade the LED by
int dial = 0;           //input for a potentiometer to set greenscale %


// the setup routine runs once when you press reset:
void setup() {
  // declare pin 9 to be an output:
  pinMode(Wled, OUTPUT);
  pinMode(Gled, OUTPUT);
  lcd.begin(16, 2);

  
}
void loop() {
  dial = analogRead(A0);
  lcd.setCursor(0, 0);
  lcd.print(brightness);
  lcd.print("               ");
  int greenscalePercent = map(dial,0,1023,0,100);
  int whitescalePercent = 0;
  int wBright = 0;
  int gBright = 0;
  whitescalePercent = 100-greenscalePercent;
  lcd.setCursor(0,1);
  lcd.print(greenscalePercent);
  lcd.print("%                ");
  wBright = map(whitescalePercent, 0 , 100, 255, 0);
  gBright = map(greenscalePercent, 0 , 100, 255, 0);
  if(brightness-wBright > 0){
    analogWrite(Wled, brightness-wBright);
  }
  if(brightness-gBright > 0 ){
    analogWrite(Gled, brightness - gBright);
  }

  brightness = brightness + fadeAmount;

  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  delay(30);
}```

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There we go

wraith current Mar 20, 2020, 11:10 PM

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so is your logic working now you just need it to fade up ?

floral thicket Mar 20, 2020, 11:11 PM

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I still need to implement it into my main code, but essentially yeah. Via an LCD screen, some buttons, and a RTC, we plan on having it so you can set a certain time for them to start turning on, and a duration of how long it will take to get to max brightness

wraith current Mar 20, 2020, 11:12 PM

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so this is like super slow fading up, as in over many minutes ?

floral thicket Mar 20, 2020, 11:12 PM

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Yeah, potentially hours as to mimic a sunrise or sunset.

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For my testing rig I am just using 2 LEDs, but the actual finished product is going to have a separate white and green LED strip

wraith current Mar 20, 2020, 11:15 PM

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If you will be having a button on the interface, then you should probably set the dial, then push the button to tell the arduino to read the dial and set the brightness values, then let it go do it's thing based on the time of day it is.

floral thicket Mar 20, 2020, 11:16 PM

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Alright, I will give that a shot later when I have a chance.

wraith current Mar 20, 2020, 11:18 PM

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Look into the BlinkWithoutDelay example sketch to get an idea of how you can do timing code over a long period of time.

sage anvil Mar 20, 2020, 11:42 PM

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well i fixed the keyboard

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something wrong with the IDE cus worked just fine when i did it from a mac

pine bramble Mar 21, 2020, 6:35 AM

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hello guys

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I have a problem with my rfid scanner

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its properly connected

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yet it still won't read when I try to scan

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any help?

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im using rc522

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<@&617066238840930324>

blazing notch Mar 21, 2020, 1:26 PM

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calm crown Mar 21, 2020, 2:12 PM

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how do i transform this into a NOT function

📎 unknown.png

woven mica Mar 21, 2020, 3:30 PM

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You use the ~ operator I suppose https://www.arduino.cc/reference/en/language/structure/bitwise-operators/bitwisenot/

Arduino Reference

The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords.

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@calm crown

calm crown Mar 21, 2020, 3:32 PM

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thanks, but i already found it

wind drift Mar 22, 2020, 12:29 AM

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Noob question: I have the Adafruit Feather nRF52840 Express. (BLE function)

I want to save battery power as much as possible. Is there a way to do it? Sleep mode or something like that? About how much current would it use?

cedar mountain Mar 22, 2020, 12:48 AM

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Yes, there are a number of sleep modes, depending on how you want to wake up. Looks like roughly 1-3uA.

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That's for the CPU. Not sure if the rest of the Feather would also draw current for the power supply, etc.

scenic citrus Mar 22, 2020, 1:44 AM

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@wind drift i haven't done it, but was doing some reading about this recently... Look into waitForEvent() and systemOff() which will put it to sleep until woken up by an interrupt or event... sorry i don't have more details than that

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Also I have read, but not confirmed, that the delay() function on the nrf52 boards actually does use a sleep mode internally, so you can eg. delay(5000) in your loop to run something every 5 seconds in a reasonably efficient way.

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https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/cores/nRF5/wiring.c
^ waitForEvent and systemOff are in this file

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in general, you won't achieve the low current draws specified in the nrf52840 docs, because the other components on the Feather boards have some parasitic/quiescent current. But the more recent revision of the board was redesigned for lower power consumption and you should be able to get it <1mA, maybe <200uA while sleeping

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& if all else fails, you can shut it down completely and use something like https://www.adafruit.com/product/3573 to turn it back on on a timed interval

wind drift Mar 22, 2020, 8:53 AM

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Thanks!

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I would like to have the BLE sort of still connected.

An example: step counter. When I press a button OR move the device it will automatically start counting my steps (Gyro/accelerometer).

But when it is sitting still for more than 1 minute it should go into sleep mode

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And also I would like to track the time. I guess I could get the current time from my phone when it is connected and then use it for tracking the steps.