#help-with-arduino

1 messages · Page 102 of 1

pine bramble
#

Is that when you start looking into using connectors like motherboards, jumpers, crimps etc ?

#

or even making your own cable my rolling different wires in ?

north stream
#

Yeah, ribbon cable with rectangular connectors, DIP headers, etc., as well as considering making custom PCBs

hollow imp
# north stream Yes, there's a matching `shiftIn()` for the other direction https://www.arduino....

Thank you, I had found. So, I did my wiring and my first code, the LEDs light up but strangely :```
int latchPin = 9;
int clockPin = 11;
int dataPin = 5;
int rst = 7;
byte leds = 0;

void setup()
{
//Serial.begin(9600);
pinMode(latchPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(rst, OUTPUT);
digitalWrite(rst, LOW);
}

void loop()
{
leds = 0;
updateShiftRegister();
delay(1000);
for (int i = 0; i < 8; i++)
{
bitSet(leds,0);
updateShiftRegister();
delay(100);
}
}

void updateShiftRegister()
{
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, LSBFIRST, leds);
digitalWrite(latchPin, HIGH);
}```

north stream
#

What did you expect them to do? What did they actually do?

hollow imp
spiral flicker
#

If you’re just trying to turn on each LED one at a time, why not use bit shifting instead?

hollow imp
#

I tried in the other direction, to read the buttons, I manage to have data for the first 7 buttons
from 1 to 7 in order (252, 250,246, 238,222,190,126) and without support I have 254

hollow imp
spiral flicker
#

What is the purpose of this code? What is it supposed to do?

hollow imp
spiral flicker
#

So for example when button one is pressed LED one turns on?

hollow imp
#

When I press a button I receive the information, and when I can turn on the led of my choice

#

I only have the connector sent previously and a photo of the PCB (There is not a lot of component on it)

honest surge
#

could anyone help me get a pi pico to work with arduino ide on fedora

#

the tools > port option is greyed out

#

my user is part of dialout group

waxen hawk
#

Hi, I am considering to buy arduino meg 2560 rev 3 as an upgrade from my uno. But i see two different types of products: elegoo and the original arduino amega. Has anybody tried elegoo products? Are they reliable compared to the original?

native dagger
#

I've used elegoo before, I can't say that they are any worse than official fare, but I also can't see they are any better

native dagger
waxen hawk
native dagger
#

I don't know about the specs, I suspect they are, but you can check. I haven't seen any failures but I've never used one to it's full capacity.

#

As for price, perhaps arduino charges more because they're the official supplier

waxen hawk
#

Thanks! Really appreciate hearing from a real user.

native dagger
#

Np!

honest surge
#

anyone?

honest surge
waxen hawk
#

morning yall. Was wondering if anybody could help out where to find ac/dc powersupply? I am trying to power 16 channel relay module rack and each module gonna power a 5 v 0.25 a solenoid. Any recommendations?

north stream
waxen hawk
north stream
#

Yeah, I figure 16 solenoids times 0.25A per solenoid works out to 4A, so you have some room to grow. I suggest using separate supplies for logic and solenoids.

waxen hawk
#

Nice, 10/0.25A = 40 solenoids! haha nice.

#

Can I cut the rubber of the powersupply to separate the wires?

bleak socket
#

Hey guys, quick question

Does a CNC shield for Arduino NEED a jumper on the pin mode?

#

The M0 M1 or M2

cedar mountain
bleak socket
#

hmm right right

#

good to know :3

elfin gazelle
#

What is wrong with this if code? Without the && x1 and y1 are working... if (x1.rose() && y1.rose())

solemn cliff
#

can you give some context ? show more code ? is it polling too fast for them to be "risen" in the same loop ?

solemn cliff
elfin gazelle
#

Basically I want to have a matrix with Buttons on the X line and Button on the Y line. When I press x1 and y1 for example a LED should light up when both buttons are pressed. when those buttons are pressed again the LED should turn of. That wold be the full If thing:

#

if (x1.fell() && y1.fell()){
x1y1 = !x1y1;
Serial.println(x1y1);
}

#

but can it be that with the bounce library the buttons have to be pressed simultaneously?

solemn cliff
#

I'm not sure if fell() is only true once (the same loop where update() is called the first time after the button is pressed) or if it's sticky, but it's at least cleared after polling for fell() I believe

elfin gazelle
#

the problem with that way here is that it will update the statex1y1 all the time when both buttons are pressed.

#

int x1Value = x1.read();
int y1Value = y1.read();

if (x1Value == LOW && y1Value == LOW){
statex1y1 = 1

x1y1 = !x1y1;
Serial.println(x1y1);
}

#

I mean it udates x1y1 from 0 to 1 and back all the time

solemn cliff
#

yeah you would have to debounce the double state yourself

#

maybe you could try this, it would trigger when the second button is detected pressed while the first one is still pressed ?

if (x1.fell() && y1Value == LOW || x1Value == LOW && y1.fell() ){
  x1y1 = !x1y1;
  Serial.println(x1y1);
}
elfin gazelle
#

How can I write the code in that square here?

solemn cliff
elfin gazelle
#

`int x1Value = x1.read();
int y1Value = y1.read();

if (x1Value == LOW && y1Value == LOW){
statex1y1 = 1

x1y1 = !x1y1;
Serial.println(x1y1);
}`

#

this seems to work as well. but yours looks more elegant. will check it out

solemn cliff
#

```arduino works for arduino code

#

I think if you don't want to continuously trigger for the length of the buttons being down with your code, you would need to add some if(!statex1y1) and some if (x1Value == HIGH || y1Value == HIGH) statex1y1 = 0;, the whole state variable dance of edge detection

elfin gazelle
#

your code works perfect!

#

it just triggers once

elfin gazelle
#

cool, another questions. I would like to achieve something like this. This function is obviously not working but is there a way t work with an input in a function like this? So that in this example, it prints the x according to the value I give it to the function? `void matrix(int xnum) {
int x1 = 1;
int x2 = 2;
int x3 = 3;

Serial.println(x+xnum)

}`

cedar mountain
pine bramble
#

Don't know if right channel, but how can I plug things in parallel on the -/+ row of a breadboard or it's not possible in the context of an arduino ? Would it even make sense to connect power in and ground in parallel ?

#

And how can I tell if it's the lines that are in series or the rows on a random breadboard I get without removing the sticker behind it ? Are there markings ? (If I ask it's because I,ve gotten some before not done in the normal way)

native dagger
#

Can you use fritzing to post what you're planning?

pine bramble
#

Just a theorical question, all breadboard have seen only have 1 column for + and 1 column for -

native dagger
#

interesting, I've had the opposite experience

pine bramble
#

I mean I know there is a left one and right one but they are a bit far

#

I meant like 2-3 columns on the left for each

native dagger
#

I have connected ground on one side to ground on another before. Same for power

pine bramble
#

I guess that answer my question

meowbreadboard.png
#

why 260 US$ thought?!

native dagger
#

quality

#

quality costs

pine bramble
#

and accessories I guess

#

seems to come with probe points, jumper wires and tie-point blocks

brazen falcon
#

One thing you have to keep an eye out on unknown breadboards is that the power and ground rails are sometimes split in half on full-length boards. USUALLY those ones have a split in the red/blue line to indicate that but not always.

#

I really dislike this type

mortal seal
#

In trying to use the stemma connection on the pico feather with the seesaw rotary encoder but it doesn’t see the seesaw. It works with circuit python but not for me with arduino. (Just using the default example). Could it be the default Wire pins?

north stream
# brazen falcon I really dislike this type

You can sometimes modify them by soldering a wire across the gap (how to do this depends on the construction of your breadboard and how tolerant you are to melted plastic. Some of them, you can peel the backing away at the edges, remove the metal contacts, solder a wire to them, put them back, and stick the backing back in place)

brazen falcon
#

Or just bin it and get a proper one.

leaden walrus
#

@mortal seal stemma on feather rp2040 is Wire1

zealous comet
#

can somebody help me out with this please?

#

getting a expected primary-expression before '}' error

zealous comet
#

#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h>
#endif

// Define display parameters
#define PIN 6
#define NUMPIXELS 7
#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
// Define uS module pins
#define TRIG_PIN 9
#define ECHO_PIN 10

Adafruit_NeoPixel display(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

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

void loop() {
// Clears the trigPin
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
long duration = pulseIn(ECHO_PIN, HIGH);
// Calculating the distance
int distance = duration * 0.034 / 2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);

display.clear();
display.setBrightness(10);
if (distance < 10) {
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(255, 0, 0));
}
} else if (distance < 20) {
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(0, 0, 255));
}
} else {
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(255, 255, 0));
}
}
display.show();
}

#

fixed my code so far, but I'm still only getting 2 colors instead of 3 for some reason

cold lagoon
#

I've made an PCB with an NRF24l01 (and some other stuff). But the NRF24l01 doesn't really work. I've tested the code with an Arduino nano connecting to an Arduino UNO and that worked but Arduino Leonardo (Atmega32u4) to Arduino UNO doesn't work for some reason. here is the wiering:

1.png
mortal seal
vivid rock
zealous comet
#

Yes, it does @vivid rock

#

Btw, I fixed my code

#

#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h>
#endif

// Define display parameters
#define PIN 6
#define NUMPIXELS 7
#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
// Define uS module pins
#define TRIG_PIN 9
#define ECHO_PIN 10

Adafruit_NeoPixel display(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

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

void loop() {
// Clears the trigPin
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
long duration = pulseIn(ECHO_PIN, HIGH);
// Calculating the distance
int distance = duration * 0.034 / 2;
// Prints the distance on the Serial Monitor
// Serial.print("Distance: ");
// Serial.println(distance);

display.clear();
display.setBrightness(10);
if (distance < 10) {
Serial.println("Less than 10");
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(255, 0, 0));
}
} else if (distance < 20) {
Serial.println("More than 10, less than 20");
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(0, 0, 255));
}
} else {
Serial.println("More than 20");
for (int i = 0; i < NUMPIXELS; i++) {
display.setPixelColor(i, display.Color(255, 255, 0));
}
}
display.show();
delay(1000);
}

#

For some reason changing the print statements fixed it

stuck coral
#

Feel free to use the discord code formatting with three `s to make it easier for people reading

stoic scroll
rich coral
#

is Arduino IDE 2.0 usable at this point ?

supple turret
#

Not tried it yet..

leaden walrus
pine bramble
#

I’m really curious if someone can tell me, having played with python recently. Is it that advantageous with esp32-s2 chipsets to use arduino or python? I’m reasonably familiar with both I’d guess. For whatever that’s worth.

livid osprey
pine bramble
solemn cliff
#

with web APIs that require json or string manipulations, I feel more comfortable to work with python, but I tend to default to python in general unless I have specific needs that are better addressed in C

pine bramble
#

I’m a wishy washy sorta fella

pine bramble
#

Is there really any point in completing basic tutorials if I had taken random chips/sensors before and wired them correctly (after a last revision from you guys), I feel like I just need the datasheet to know how to wire it/what code to write ?

#

Or I might miss some basic things having skipped tutorials ?

pine bramble
#

ok 😦

tidal vale
#

Greetings! I'm trying to use the Adafruit seesawPreipheral in one of my projects, but the ATtiny8x7 are very out of stock, but I was able to get (and have a few) ATtiny1614 devices so I wanted to add support to the library for them. However, I'm having difficulty understanding what the ALL_GPIO, ALL_ADC, and ALL_PWM defines (which are chip specific) are trying to do. Referencing them to the data sheets isn't making sense to me. I wasn't sure if the best place to ask questions was here or in a GitHub issue, I'd be happy to add the appropriate defines for all the common chips available via drazzy's (maintainer of tinyAVR) as part of my PR for the library if that would be acceptable. What's the best way to proceed?

pine bramble
#

the bit mask ?

tidal vale
#

Yeah, I can't figure out the relation between the bitmask and the ports/pins

pine bramble
#

0x1FFFFFUL // this is chip dependant, for 817 we have 21 GPIO avail (0~20 inc) just mean 21 bits unsigned long bitmask ie: 21x1

#

since the family of chips have at most 21 pins, need a bitmask with 21 1

tidal vale
#

That I get, but the PWM and ADC mask doesn't line up with what the datasheets report

#

I think it's trying to capture this information from the ATtiny417/814/816/817 datasheet but I don't understand how

unknown.png
pine bramble
#

yeah I see the confusion 😦

tidal vale
#

The good news is that "cheating" and bringing those defines from the 817 over and compiling for a 1614 works, and will even fit on the device! Now I just need to figure out the right values so it has a chance of working...

livid osprey
pine bramble
#

yeah but the datasheet doesn't even match the code to start with

#

the 1617 have either 20 or 24 pins not 21, and at most 2-3 pins without analog....

tidal vale
#

Yes, the schematic does help for figuring out pin to port mapping, but not the pin to PWM/ADC mapping

pine bramble
#

the pdf isn't even searchable...

livid osprey
#

Each bit corresponds to the GPIO number aka the wire number in the schematic, starting with 0 on the far right (LSB)

#

For ADC, all the AIN-labeled pins in the schematic match up to a 1 bit, while the remaining pins are all 0.

#

TXD, RXD, SCL and SDA are also GPIO 8-11, and are included in the ALL_GPIO/ADC/PWM bits, but are noted in the INVALID_GPIO define as well, to filter them out of the VALID_GPIO bitmask later on.

tidal vale
#

Ah, OK - so it matches this pinout but not the function table

unknown.png
#

So the ADC bitmap makes sense now, just need to decode the PWM map

#

Thanks for the pointers @pine bramble and @livid osprey !

livid osprey
#

Looks like the PWM is whatever TCA and TCD are mapped to. The PWM functionality is probably dependent on the timers with the particular controls those two timers have.

pine bramble
#

tangent question @livid osprey seems you are experience, why so much pages for a datasheet?

livid osprey
#

An MCU has a lot more detail than its dev board lets on. Things like architecture, instruction sets, peripheral multiplexing, etc, are all critical development details that are handled for you by the circuitpython packages and arduino builds you can download off the internet haha

#

All those details, the hobbyist tinkerer doesn't need to know about to get things to work, but someone has to engineer the dev board and packages with those very details to get to that point.

pine bramble
#

Can I assume those are "correct" just like the datasheet "are" ?

#

ie: can't do anything with my current knowledge anyway if they aren't

#

I mean I don't see how different that is from using windows.h and directX library hoping that the video cards drivers and windows API methods are correct...

livid osprey
#

Yes? As long as you're working with manufactured boards and not raw chips/PCB design, you shouldn't really need to worry about the details in the datasheet.

rose moss
#

has anyone ever ran Arduino in their car for lighting control?

pine bramble
#

anyone=yes, in here I don't know, know a guy at work who has some sensors on his car and can check from from at work. also if you interfere too much with the car the car could lose road legal classification

north stream
pine bramble
pine bramble
# north stream Heh, yeah

in my state using a carrousel led system made the car not street legal (too distractive to other drivers))

north stream
#

The rotating and flashing lights on top make that one a little distracting as well.

pine bramble
#

to control say headlights with it you'll need some tricks because arduino don't have enough voltage and these are grounded to the car battery usually

north stream
pine bramble
#

Just gotta be careful because some amps are involved specially from the lead battery

#

And you have to be careful especiall;y if you want to run an arduino from it as well with rectifiers/diodes etc

#

Just because something runs on 12V/5A doesn't mean you can't use 5V/30mA logic to tell it what to run and when 😄

north stream
#

Yes, vehicles are subject to an effect known as "load dump", which can throw a couple hundred volts on a nominally 12V supply (which often runs over 14V when the engine is running).

#

The sign scrollers pictured run from ordinary UBECs which have been in place for about three years now and still work fine.

pine bramble
#

Like says their range is above 3V is 1?

#

BUT "The digital inputs (IND_1, IND_2, IND_3. IND_4_WKE) sense the presence of three voltage level states: “Active High”, “Open” and “Active Low” and are compatible with standard 5v logic devices"

#

So technically these devices seems you could control the controller with an arduino while it's connected to regular car healights, honk etc

north stream
#

Yes, many devices include interfaces or level converters to allow them to safely communicate with low voltage electronics.

vivid rock
north stream
#

Transient voltage suppressors, zener diodes, filter and decoupling networks, etc. There are even special protective chips made for just such environments.

pine bramble
#

you can also buy usb converter which is a relatively standard car part

north stream
#

Automotive electronics is some of the most robust stuff out there. Subjected to blistering heat, freezing cold, all kinds of humidity, vibration, no maintenance for decades, horrible power, etc.

pine bramble
#

that will provide 5V@3A off the battery for your arduino

#

And no need to check the 3A, that is a maximum, arduino will draw what it need up to its specs of 150mA

uncut kindle
#

I'm coming back with the same problem I had before, but with a bit more insight

#

I'm having trouble uploading code to my Adafruit Feather M4 Express via the Arduino IDE

#

I have downloaded the proper board library and I'm trying to upload just a mostly blank file to make sure I can get it consistently

#

I have my board hooked up to my computer via USB to Micro USB and the board is connected to nothing else, although it has pins soldered on.

#

I double click the reset button to put the chip in bootloader mode, then I select the board port PORT4 in the Tools tab of the IDE

#

Then I'll just click Upload

#

Very occasionally this'll work, but most of the time my result is something like this:

# 
Arduino: 1.8.16 (Windows 10), Board: "Adafruit Feather M4 Express (SAMD51), Enabled, 120 MHz (standard), Fast (-O2), 50 MHz (standard), Arduino, Off"

Sketch uses 12504 bytes (2%) of program storage space. Maximum is 507904 bytes.

Device       : ATSAMD51x19

Version      : v1.1 [Arduino:XYZ] May 17 2020 17:56:23

Address      : 0x0

Pages        : 1024

Page Size    : 512 bytes

Total Size   : 512KB

Planes       : 1

Lock Regions : 32

Locked       : none

Security     : false

BOD          : false

BOR          : true

Write 12760 bytes to flash (25 pages)

[==============================] 100% (25/25 pages)

Done in 0.203 seconds

Verify 12760 bytes of flash

[========                      ] 28% (7/25 pages)

SAM-BA operation failed

An error occurred while uploading the sketch



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

SAM-BA operation failed

#

The same error occurs when the chip is unplugged during the file verification, so at a guess the chip is somehow disconnecting itself during the upload

#

I've done my research to find people with the same error but their answers are about as consistent as my results. I found one that said they just plugged a different mouse into their computer and the error fixed itself'

#

Anyone have any idea what I could do to fix this?

compact pine
#

Dumb Arduino question, but in this code block:

/* Assign a unique ID to this sensor at the same time */
Adafruit_HMC5883_Unified mag1 = Adafruit_HMC5883_Unified(1);
Adafruit_HMC5883_Unified mag2 = Adafruit_HMC5883_Unified(2);

Why is it necessary to do a variable assignment after? Isn't it sufficient to write Adafruit_HMC5883_Unified mag1 for object instantiation to a unique variable name?

uncut kindle
#

Oh also idk if it's relevant but it always gets stuck at the same page when it does get stuck

uncut kindle
#

I just found this guide on transferring code via the bootloader mode of the Feather M4 but it says that I need to transfer the files in .uf2 format, and provides a Python script for converting a .bin file into .uf2. Would this work with the build from any .c or .cpp compiler?

brave roost
#

I'm inputting 1.06 volts thru my bench power supply (non-transformer type), teensy reads it as 1.61 volts

#

did I break it?

#

I previously had a piezo crystal plugged into a different analog in, though it was never struck 'that hard', some tapping with the finger

north stream
brave roost
#

is such deviation between input and what it reads normal maybe? I verified it with my multimeter, it is indeed 1.06 going in

livid osprey
#

Do you have separate grounds or a different reference voltage, perhaps?

brave roost
#

as in test with different ground pins? I tried from 2.5 to 0.4 volts

#

the relative range is on point, no dead spots or anything like that

#

but say when my psu reads 0.4 the serial monitor reads 1.0

livid osprey
#

Your teensy is probably interpreting your voltage input as a 0-5V signal, but you have a 3.3v reference instead of 5.

brave roost
#

Ah, yes

#

I did tell it to interpret it as 5

#

so the error was that the ceiling is 3.3

#

and thus it interprets it wrong

#

yes?

livid osprey
#

Yes

brave roost
#

awesome

#

thank you

livid osprey
#

If you multiply your 1.06 by 5/3.3, you get 1.606v

brave roost
#

yea makes sense

#

sorry for taking up the time with a nonsense like that haha

livid osprey
#

No, no problem at all! Don’t worry about it, if only all the problems had simple solutions like this haha

brave roost
#

speaking of problems with less simple solutions,

#

that piezo I was reading thru analog in was giving me a hard time, if I tap it with the finger it reads things reasonably nicely, however if I tape it to my desk and tap the desk or even bang on the desk there's no output

#

I tried running it just gnd / A01 and that was how it behaved

#

and then I tried it with a LM258 (op-amp, maybe wrong type?) to get just about identical results

#

I've seen people on the net tape those to guitars n such and get good output, so I am puzzled as to what I am doing wrong

#

if you have any advice in which direction I should go or any article I could read to get a better understanding of this?

slate pendant
#

hey guys I'm trying to use a pointer to point to the TCNT1 (I'm using TCNT1A and B) register and two variables to create a 32bit (unsigned long) counter through software but the compiler and IDE2.0 just gives me this.
I've also tried the pointer tutorial from reference which has the same effect.
Solution to create 32bits from 4 bytes found here:
https://forum.arduino.cc/t/how-to-combine-four-8-bit-int-numbers-to-create-a-32-bit-number/287382/2

Please @ me if you have literally any idea what wrong with my code :)

unknown.png
Arduino Forum
How to combine four 8 bit int numbers to create a 32 bit number?

Suppose you have 4 bytes (= 8-bit numbers, or uint8_t), called b1…b4, b1 being they the LSB and b4 the MSB. To turn them into a long do this: uint32_t myLongNum = (b4 << 24) | (b3 << 16) | ( b2 << 8 ) | (b1); uint32_t is a native unsigned, 32-bit integer, it is an unsigned long. (Note: you can also try using “+” instead of “|” in the code abo...

stable forge
#

@uncut kindle Try another USB cable that you are sure is working as a data cable. We see more trouble with USB cables than anything else. Also try another USB port, and if you are using a USB hub, try connecting directly. Reboot the host computer as well.

Your technique of double-clicking and then selecting the port is exactly what I would suggest.

You can also try the cleanup tool described here: https://learn.adafruit.com/welcome-to-circuitpython?view=all#device-errors-or-problems-on-windows-3094694-11

slate pendant
stable forge
#

no, I am only answering ones I have immediate answers. I'm not being systematic. This is not an official support channel.

slate pendant
#

aight thx anyway

#

tho any idea about my pointers? :D

pine bramble
#

does it solve an actual problem or is that homework/theory ?

slate pendant
#

actual problem

stable forge
#

the pointer stuff is not right. Take away the & before the uint8_t's. Could you paste the code here instead of taking a picture?

#

it's hard to read

#

See the end of #welcome for how to paste code

slate pendant
# 
volatile uint8_t TCNT1HL; // 24bit extension of Timer1 
volatile uint8_t TCNT1HH; // 32bit extension of Timer1 TCNT1
volatile uint16_t *TCNT1F;
TCNT1F = ((TCNT1HH)<<8)|(TCNT1HL);
volatile uint32_t *TCNT1FF;
TCNT1FF = (TCNT1HH<<24)|(TCNT1HL<<16)|(TCNT1H<<8)|(
TCNT1L); // up to 268 seconds (4min)
stable forge
#

why is TCNT1F a pointer?

solemn cliff
#

isn't the issue that your are doing assignments outside of a function or initialization ?

livid osprey
stable forge
#

I would just do:

volatile uint8_t TCNT1HL; // 24bit extension of Timer1 
volatile uint8_t TCNT1HH; // 32bit extension of Timer1 TCNT1
volatile uint16_t TCNT1F;
TCNT1F = ((TCNT1HH)<<8)|(TCNT1HL);
volatile uint32_t TCNT1FF;
TCNT1FF = (TCNT1HH<<24)|(TCNT1HL<<16)|(TCNT1H<<8)|(
TCNT1L); // up to 268 seconds (4min)
#

are those hardware registers?

#

or just variables?

slate pendant
# stable forge why is TCNT1F a pointer?

TCNT1 is a 16 bit Counter/Timer hardware register, that I need to extend with regular variables to 32 bits.
This code is outside of any function because I need the pointers to be global and I cant afford wasting CPU cycles on constantly assigning the variables

stable forge
#

ok, looks like TCNT1 is a predefined variable somewhere

solemn cliff
slate pendant
stable forge
#

do not declare TCNT1, just assign to it:
TCNT1 = something

slate pendant
#

I thought defining a pointer was ok outside functions

solemn cliff
#

ok

int thing = 1;

not ok= error: 'thing' does not name a type

int thing;
thing = 1;
#

or you init it in setup()

slate pendant
stable forge
#

random code from a page:

void setup()
{
  pinMode(ledPin, OUTPUT);

  // initialize timer1 
  noInterrupts();           // disable all interrupts
  TCCR1A = 0;
  TCCR1B = 0;

  TCNT1 = 34286;            // preload timer 65536-16MHz/256/2Hz
  TCCR1B |= (1 << CS12);    // 256 prescaler 
  TIMSK1 |= (1 << TOIE1);   // enable timer overflow interrupt
  interrupts();             // enable all interrupts
}

ISR(TIMER1_OVF_vect)        // interrupt service routine that wraps a user defined function supplied by attachInterrupt
{
  TCNT1 = 34286;            // preload timer
slate pendant
#

if I init in setup can I use it in interrupts/other functions?

stable forge
#

TCNT1 is assigned to. It does not need to be declared: it is already declared implicitly by the Arduino magic

#

which adds includes, etc.

slate pendant
#

I dont declare TCNT1

#

I declare new names for extensions of the timer/counter

stable forge
#

I know, you don't need to. Why not just assign to it if you want to set its value

#

I'm not sure what you mean by "extensions"

slate pendant
#

TCNT1 is 16 bit

#

I need 32 bits of counter precision

#

so I take TCNT1L (lower part of TCNT1, predefined) and TCNT1H and more or less extends its memory space to 32 bits by assigning it to an unsigned long

stable forge
#

I'm trying to find the timer description in the datasheet

slate pendant
#

I'm on an Arduino Micro atm btw but I plan on making it ESP8266 compatible

stable forge
#

ESP8266 will have completely different registers

slate pendant
#

yes I need the micro for debugging tho

stable forge
#

so ideally you would use a Timer library that is implemented on both

slate pendant
#

Timer libraries are not designed for <500ns operation also I need a counter library not Timer even tho hardware side its the same

stable forge
#

only 16 bits. I don't see a 32-bit possibility here

slate pendant
stable forge
#

I don't see that the hardware provides 32 bits of timer precision anywhere

slate pendant
#

exactly thats why I need to implement it through software

stable forge
#

do you mean you are going to simulate it?

slate pendant
#

I can waste a couple singular cycles every 65535 cycles for incrementing another variable but I need to read out both at the same time as it were an unsigned long

stable forge
#

so you are going to simulate the upper 16 bits, and make the lower 16 bits be the actual TCNT1 register? The TCNT1 register is at a fixed place in the address space, so you can't store data adjacent to it.

slate pendant
#

thats what I found through own research

#

it technically has 2 more bytes beneath it on the micro but thats not a good approach

stable forge
# 
uint32_t TCNT1_32; // Fake TCNT1 register, extended to 32 bits
...
// Set the lower 16 bits of TCNT1_32 with the value from TCNT1
TCNT1_32 = (TCNT1_32 & 0xffff0000) | TCNT1;
#

you could use C unions or a struct also

slate pendant
#

but it is what I'm trying to do with pointers

stable forge
#

I'm still confused by this. You could just store the upper 16 bits somewhere else and merge them when you want a full 32-bit value:

uint16_t FAKE_TCNT1_HIGH_16_BITS;
...
uint32_t FAKE_TCNT1_32;
FAKE_TCNT1_32 = (FAKE_TCNT1_HIGH_16_BITS << 16) | TCNT1;
slate pendant
#

ok hang on

pine bramble
#

pointer require an assignment of memory value to not point to null...

#

they are more costly than variables on the assignement cost

#

their point is access cost

stable forge
#

a pointer is an address. You have to dereference it

slate pendant
#

yes access cost is the problem

stable forge
#

what interrupt is the interrupt routine invoked on? TImer overflow?

slate pendant
#

I have the following two interrupts:

# 
void IRQ() {
  #if defined(TCNT1FF)
      Time = TCNT1FF;
  #elif defined(TCNT1)
      Time = TCNT1;
    #warning TIMER 1 is only 16 bit
  #else
      #error TIMER 1 not defined
  #endif
  if ( digitalPinToPort(_PIN) ) {
    T0E, T1S = Time;
  } else {
    T1E, T0S = Time;

    // one full bit has been sent, now calculate if it was HIGh or low.

  }

}
stable forge
#

an assignment is a cheap operation; i'm not sure why you're concerned about it

slate pendant
#

and

ISR(TIMER1_OVF_vect) { // triggers on Timer1 overflow
  *TCNT1F += 1; // increases upper 16 bits by 1 until overflow
}
stable forge
#

so to fetch the entire 32-bit value, it's (TCNT1F << 16) | TCNT1

#

TCNT1F is your software-simulated top 16 bits, I think

slate pendant
stable forge
#

a pointer to what?

#

why does TCNT1F need to be a pointer? Why can't it just be a static 16-bit variable?

slate pendant
stable forge
#

TCNT1F++ instead of (*TCNT1F)++

#

volatile uint16_t TCNT1F;

slate pendant
#

so I can access each on its own easily. but using a regular definition for this should work, let me try ( I just really didnt understand why my pointers didnt work )

stable forge
#

TCNT1 itself can't be in there, because it's not in RAM, it's a register. SO there is not RAM adjacent to it. So no matter what, you have to copy what's in TCNT1 to the lower part of your 32-bit value.

#

but you don't have to copy that until you need the value, somewhere outside of the irq routine(s)

slate pendant
#

it compiled

#

I'll see if it works - PS: I was the one ages ago who asked how to read Neopixel (i.e. WS2812B) data and transmit it over WiFi, guess what my problem was up until now :D

#

I've set TCNT1 up without a prescaler and now just need to properly call the interrupt from when it overflows but I think I already got it working if the documentation is right.

stable forge
#

you can use a union:

#include <stdint.h>
#include <stdio.h>

union {
    uint32_t full32;
        struct {
            uint16_t low16;
            uint16_t high16;
        };
} num;

int main() {
    num.low16 = 1;
    num.high16 = 2;
    printf("0x%x\n", num.full32);
}

prints 0x20001

slate pendant
#

I've really gotten deep into C/Arduino and even ASM coding to find out how to read a signal that alledgedly is wayy too quick for a 16MHz arduino because micro() only does 8micro second intervals but the controller can PRODUCE the signal anyway :D

slate pendant
#

you guys were a great help it is appreciated! if you have a coffe jar let me know I'll put some in when I finish my project!

brave roost
#

I'm trying to read my data with serial plotter, however after a few seconds of running my plotter stops updating

#

script looks as basic as it gets,


void setup(){
}
void loop() {
  test = analogRead(A1);
  Serial.println(test);
}
#

teensy 4.1, tested at 24mhz n 1ghz (yes its cooled)

stable forge
slate pendant
#

is it also if I buy arduino boards from a closer retailer?

compact pine
north stream
#

Yes, it depends on how the library is implemented.

brave roost
north stream
leaden walrus
#

@brave roost serial plotter stopping - might be related to not calling Serial.begin() in setup()?

brave roost
#

plotter issue got fixed by me selecting com3 instead of com3 serial

#

shrug

brave roost
#

I tried an op-amp through someone else's recommendation, but I am not able to get it to do the things I want it seems

north stream
brave roost
#

mine is a contact piezo crystal not an air suspended one

#

I was considering to grab one of those mic modules and swap out the crystal bit

#

though wasn't sure if that was the best way to go about it

north stream
#

I don't know if it's the best way either, but probably worth a try.

brave roost
#

I have enough knowledge to assemble a circuit, but rather not have to hunt down that one odd-ball piece for months

north stream
#

You're probably better off with an ordinary transistor or op-amp amplifier.

loud light
#

I need a hand getting the Adafruit_ST7789 2" TFT working with the FeatherS2. Using the adafruit gfx lib, I can only seem to initialize the screen using the software SPI method. I'm having trouble getting the feather's hardware SPI to work. I suspect it's related to the board also using SPI internally for the SD card. Does anyone have experience getting the graphicstest.ino sample to work with a FeatherS2 & ST7789? I'm guessing there is an SPI config step I'm missing.

FeatherS2_AdafruitTFT.jpg
leaden walrus
#

add code to explicitly set the other SPI devices CS to make sure they are inactive.

# 
pinMode(FOO_CS, OUTPUT);
digitalWrite(FOO_CS, HIGH);
#

can put in setup()

uncut kindle
stable forge
#

Try to find a cable that you know works for data transfer, with, say, a phone or tablet.

uncut kindle
#

Would be a great idea if any of those I used Micro USB

#

I'll find one though and come back with more info

brave roost
# north stream You're probably better off with an ordinary transistor or op-amp amplifier.

So I took 3.3 & gnd from teensy and fed it into the op-amp, added +/- from my mic into 1st intput + & - (its a dual op-amp,LM258P) and then took the output1 and fed that into my A1.
Documentation says the supply range to be 3 to 32v, so it should be doing something.. However the results are identical to those where I had no op-amp.
The documentation also does not make feature anything about additional components needed
As for a diy amplifier circuit, I was only able to google up a schematic that is reliant on a 9v source and a transistor I can not locate anywhere locally, though given that my analog can't exceed 3.3v that approach doesn't really work

#

apologies if this is getting overly annoying

#

its fine tbh, I think I got something to work with already thanks to your help, I'll mess with it and hopefully get to a new roadblock sometime soon

loud light
leaden walrus
#

cool. even easier then. no additional code needed. 🙂

lone lantern
#

Anyone know if there's any Teensy 4/4.1 to feather adapters made by chance?

north stream
umbral wigeon
#

Hi may i ask a question, I read the nRF52 bootloader on the Github, why did you put SDK11 in there which ble stack on the bootloader, you actually can make a file as the third library to release the memory for the bootloader.

zinc bridge
#

Adafruit BusIO 1.9.7 broke compiling for VSCode+PlatformIO and Arduino IDE. 😦

leaden walrus
zinc bridge
faint raft
#

So, Adafruit_GFX on Adafruit_ILI9341. My screen is 320x240. Why does it take 1,200 milliseconds to call drawBitmap() with a background color specified? If I omit the background from the drawBitmap() call and instead use fillRect() directly on the display and then render the canvas on top, it only takes about 200-300 milliseconds.

slate pendant
#

pls @ me, I'm letting this message cook over night :P

livid osprey
#

That should be it?

slate pendant
#

this does not have any register names tho..
I think I've already had that one.
Thing is I have Interrupt and Register requiring code for my Arduino Micro and I want to port it over (using #ifdef etc)

magic isle
#

Helloo

#

Slight issues

#

Measuring current with a shunt

#

And want transistors to turn the shunt on or off

# 
Shunt = A1 and GND
PWM = D3
#

Any ideas about it

#

With a npn or pnp transistor

#

How would I go about that

north stream
#

It's a little tricky, as you'd normally want the shunt at the 0V end, which would act as an emitter resistor, causing possible degeneration. It may or may not be an issue, depending on current, shunt value, etc. If your positive load supply rail is the same as your logic supply rail, you could use high side switching (with a PNP transistor) and low side sensing.

magic isle
#

Ah

#

Perfect

#

Thank you

small pumice
#

Anyone experienced with transfering data FROM RPi to Arduino (Feather M0 WiFi)? I need to move a csv to a card in an AdaLogger. I have the usual WiFi101 web server running that allows file downloads to any client from the Arduino, but cannot figure out the way to RECEIVE a file and write it to the SD. I figure it probably revolves around using (strstr(clientline, "GET /") != 0) but with PUT or POST.

#

Alternatively, I could SCP from the Pi, but cannot find a way to receive THAT from the M0.

stuck coral
#

You then need to take those contents and save them to your SD card or whatever

small pumice
#

@stuck coral Thanks. Looking into that now.

quaint cloak
#

can i use the library of rfm95 for the rfm96 lora

#

gonna use it at arduino mega

#

and if there is anything i need to know

cedar mountain
#

Yes, you should be able to. They're the same radio chip, just set to different frequency ranges, I believe.

quaint cloak
#

should i also use it at my arduino mega or should i just use the rf95?

stuck coral
spice vapor
#

I am having a problem with my bluefruit feather sense board.

It's no longer responding to reseting with the button press. It's currently not showing up on USB.

I have checked the cable and it is a data cable. Is there a factory reset method I could try?

stable forge
spice vapor
stable forge
#

does the LED next to the USB jack (on the battery jack side) pulse slow or fast?

spice vapor
#

the one marked CHG pulses quickly.

stable forge
#

if the other one is not doing anything, then the bootloader is not coming up. DO you have any inkling that the reset button might be broken? You can simluate it by grounding the RST pin. That is what the rest button does.

leaden walrus
#

@stable forge my D13 doesn't appear to be driven by bootloader. neopix is though.

stable forge
#

on Feather Sense? Mine is

#

hmm

leaden walrus
#

yep. but i could have an older version.

# 
UF2 Bootloader 0.2.9 lib/nrfx (v1.1.0-1-g096e770) lib/tinyusb (legacy-755-g55874813) s140 6.1.1
Model: Adafruit Feather nRF52840 Express
Board-ID: NRF52-Bluefruit-v0
Bootloader: s140 6.1.1
Date: Feb 22 2019
stable forge
#

UF2 Bootloader 0.3.2-91-g2df81e6 lib/nrfx (v2.0.0) lib/tinyusb (0.6.0-272-g4e6aa0d8) lib/uf2 (heads/master)``````

leaden walrus
#

@spice vapor is the neopixel doing anything? larger square one

spice vapor
#

@leaden walrus nope no other lights, which is also a bit odd.

#

@stable forge I don't think it would be broken. Bit of a noob here 🙂 but to ground RST what do I need to do .

leaden walrus
#

"no longer responding" - so it used to work?

stable forge
#

@leaden walrus would like you to continue here?

spice vapor
#

Yes, about 30 minutes ago. was working via VScode + platformIO

leaden walrus
#

@stable forge sure. i can ping you if it seems back in something core land.

spice vapor
#

have chekced in arduio IDE as well and it's not showing up there either,

leaden walrus
#

@stable forge before you go - is bootloader protected on nrf?

spice vapor
#

I assume that it's a board problem as reset should just work ( in theory)

leaden walrus
#

@spice vapor what was the last thing you did before it stopped working?

stable forge
leaden walrus
#

right. nor me.

spice vapor
#

uploaded a sketch whilst it was connected to a breadboard circuit ( ECG setup ) I then reset and it wouldn't

stable forge
#

had you used platformIO previously successfully?

spice vapor
#

Yup!

leaden walrus
#

is the feather still attached to the breadboard setup?

spice vapor
#

No, I have discconnected everything so just focusing on getting a blinky example to run again.

leaden walrus
#

do you have a multimeter?

spice vapor
#

yes 🙂

leaden walrus
#

try checking the voltage on the 3v pin

spice vapor
#

3.27

leaden walrus
#

in general, need to rule out it haven been zapped by something with the breadboard setup

#

hmm. ok. that value is good.

spice vapor
#

Is there a terminal command I can run to see if it can detect it? I remeber running something similar when setting up mu for circuit python

#

( for annother project )

stable forge
#

have you rebooted the host recently?

#

since the problem?

spice vapor
#

Yep.

#

( MacOS BigSur 11.5.2 )

leaden walrus
#

how did you verify the USB cable?

spice vapor
#

I tested it with another board.

#

I just used ls /dev/tty.* and the bluetooth-incoming-port is showing.

#

which also shows in the arduino IDE but I can't actually upload to it.

elder remnant
#

Hey does anyone know if arduino can run audio files of a voice with just a cheap speaker and regular breadboard stuff? Thanks!

leaden walrus
#

does that port disappear / reappear as expected if you unplug/plug the USB cable?

spice vapor
#

oh I am trying the ls command with another board and it isn't showing the USB port either.

#

So there is definitely something fishy going on. I am going to dig out some more cables and try on another machine as well. But even if the computer isn't detecting the change shouldn't the board go into boot mode with the double tap? Could I test that by hooking it up to a battery pack and testing it?

leaden walrus
#

yah, it should still do the expected bootloader behavior. but also, fishy things do fishy things.

pallid grail
#

@leaden walrus Hiiiiiiiiiii. (Question.)

leaden walrus
#

and see if you can get a usable port that way

#

@pallid grail sure

pallid grail
#

Or what's going on there with those.

leaden walrus
#

i think they're touch

pallid grail
#

Um.... No, that doesn't jive

#

I ran a touch pin script earlier, and that doesn't match.

#

That's a physical attribute, right? Not a software attribute?

spice vapor
#

@leaden walrus thanks for your help I will sing out if anything works or dosn't 🙂

pallid grail
#

(Sorry for interrupting jen!)

leaden walrus
#

T1 isn't necessarily D1 etc. would need to check a pinout for ESP32.

pallid grail
#

hmm.

leaden walrus
#

to figure out which actual pin those are on

pallid grail
#

That's straight up a longer list than came out of my script though.

#

like.... it's too many pins.

#

I guess some of them could be not broken out pins, but why include them if they're not available?

#

I have 12 in my script results, and one of the ones listed isn't even available physically.

#

I guess the ones listed in this file could be entirely arbitrary?

#

So in the schematic

leaden walrus
#

got an esp32s2 datasheet?

pallid grail
#

IO1-IO14 are listed, but IO1 and IO2 aren't even connected to anything

#

UGH... yes... but it's so obtuse, I really struggled with getting any useful info out of it

#

Let me pull it up

leaden walrus
#

check 3.2 pin desc

#

TOUCH1 through TOUCH14

pallid grail
#

O.o

#

Ok I see it now.

#

I'm not sure all of them are even connected is the thing.

leaden walrus
#

looks like they pretty much line up though, like T1 is on D1 etc

pallid grail
#

There is no D1.....

#

broken out

#

Did the Arduino setup for it implement all the ESP pins but not take into account what's actually available on the Feather?

leaden walrus
#

correct

pallid grail
#

Oh.

#

Explains my deep confusion.

#

Ok. So uh.... On the schematic, the Arduino pins are == to the IO pins?

Screen_Shot_2021-11-29_at_19.42.29.png
#

The only other instance of this section of this template included the CP and Arduino names for the pins. I'm trying to be consistent with my earlier documentation.

leaden walrus
#

ha! was just grabbing same thing.

pallid grail
#

Seems like a lot of work, but if it's unclear to me, it'll be unclear to others.

#

So, better to make it clear.

leaden walrus
#

yah. same. like you can see how D5 is IO5 etc.

#

but some pins aren't broken out

pallid grail
#

Right. But A5 is IO8, so it's not all things equal.

leaden walrus
#

others are used for alternate funcs

#

etc.

pallid grail
#

Right.

#

Pin 7 is wonky.

leaden walrus
#

oh. ok. not all things.

#

mainly just digital io

pallid grail
#

Right.

#

Ok.

#

Thank you! As usual, I expected this to be a quicker answer than it was. 🙄

#

Appreciate you taking the time.

leaden walrus
#

D5 looks like the lowest touch pin available

#

1 and 2 not broken out. 3 and 4 used for i2c.

#

yah, and 7 is dedicated to i2c power

#

A0 would end up being ADC2_CH7, for example

pallid grail
leaden walrus
#

if nothing is attached to them

pallid grail
#

Right ok that's what I meant

leaden walrus
#

incl on board pull ups

pallid grail
#

wait..

#

So, not so much?

#

Because aren't those kinda... built in?

leaden walrus
#

this is feather esp32s2?

pallid grail
pallid grail
pallid grail
#

Ooh wait

#

pullups only on the STEMMA connector?

#

(I'm still not great at reading schematics)

leaden walrus
#

there's i2c stuff included on that feather. bme280, lipo monitor

pallid grail
#

Yeah, right

leaden walrus
#

so all that will mess up touch

pallid grail
#

Ahh.

#

Ok.

#

So leave those out as well, then?

#

in my "list of touch pins"

leaden walrus
#

yah, there're not really usable.

#

same goes for using them as GPIO i guess

pallid grail
#

Here is what I have now: A4 A5 D13 D12 D11 D10 D9 D6 D5

#

A4 initially got caught on the "tell-Markdown-what-kind-of-code-this-is" line.

#

@leaden walrus Adding an alert: There are other pins that are touch capable on the ESP32-S2 module itself, however, the layout and circuitry on the Feather render them unusable as touch pins. Wording seems weird, but...

leaden walrus
#

yah. that list looks ok. i think.

pallid grail
#

It's the touch pin script results minus the ones that don't work.

#

so it should be correct.

leaden walrus
#

it might be worth changing that header file in the BSP

#

then pretty pins would show what's actually available

pallid grail
#

What is a "header file in the BSP" ?

leaden walrus
#

BSP = board support package (that entire repo)

pallid grail
#

Ahh.

#

@leaden walrus Doesn't that involve a PR to espressif?

#

Oh looks like they're semi-responsive anyway.....

leaden walrus
#

yep. and worth asking about first. i'm mainly just thinking out loud.

pallid grail
#

Yeah fair enough.

stable forge
# spice vapor So there is definitely something fishy going on. I am going to dig out some mor...

a "power pack" often doesn't work with the boards because it expects things that draw more current, and shuts down when there's only a small draw. So a 5V AC adapter is usually a better test. Since there's no host connection, when you double-click, you should get a "fast pulse" on the boot LED, which indicates the bootloader is not see a host. Try this on another board to see it for sure.

pallid grail
#

I could also manually update the PP diagram. Did it earlier too, heh. Such is life.

#

Faster than regenerating it, tbh.

#

For something like this.

#

Anyway. Thanks again, cater.

regal mural
#

I can't always get my sketch to upload to my Adafruit Qt py (ATSAMD21). Am I dong something wrong?

#

Using the arduino IDE

spice vapor
#

if I plug it out it still shows the same port after executing ls/dev/tty.*

stable forge
#

I don't understand macOS's rules for adding ports 🙂

north stream
#

I think the Bluetooth one sticks around, I'd expect another tty to show up when something is plugged in that provides a serial link.

native elbow
#

Working with the ESP32-S2 Feather, I can't figure out from looking at Arduino documentation or googling: how do you implement I2C_POWER in Arduino code for this board. I saw how it was done in Circuit python but I can't find any examples with it in Arduino

livid osprey
#

For the BME280, configure I2C_POWER as an output and drive low.

#

If I2C_POWER doesn't work, you can also just use pin 7.

green thunder
#

I don't think all the board definitions for the Feather ESP32-S2 are there or are all correct at the moment. I didn't see the power pin in there, and the UART pins aren't defined properly either

livid osprey
green thunder
#

The learn guide is correct!

livid osprey
#

It is a new board so things may not be perfect yet.

green thunder
#

Just the Arduino pin definitions for it arent yet lol

livid osprey
#

It is pin 7 so you can use that for the time being.

green thunder
#

Unfortunately the learn guide wasn't up yet a couple weeks ago when I was figuring all this out lol

livid osprey
#

No software change can possibly re-wire your board LOL

green thunder
#

Truth lol

pallid grail
#

@leaden walrus ping.

leaden walrus
#

@pallid grail pong.

pallid grail
# leaden walrus <@!330227457296957440> pong.

Hey. Question about adding to the arduino-esp32 BSP. Limor said "we have a fork, commit there". I see you did something recently with it. Am I supposed to PR to it? Or am I supposed to commit directly?

leaden walrus
#

ha. good question.

#

that recent thing i did was a direct push to master

pallid grail
#

I feel like that's what Limor meant. But I wasn't sure.

leaden walrus
#

but in general, i'd prefer to have done a PR

pallid grail
#

Yeah I hate pushing to master, heh

#

makes me itchy

leaden walrus
#

me too

pallid grail
#

I guess I'll PR it because it's habit and Limor can approve it.

leaden walrus
#

yah. PR. let's see what happens.

pallid grail
#

Thanks!

#

@leaden walrus It turns out every ESP32-S2 board has every touch pin enabled in the Arduino BSP. 😄

#

Limor said to update the Feather and "look at the other boards too if (I'm) up for it"

leaden walrus
#

it's not really "enabling" them, just defining them

pallid grail
#

Ah

#

Better wording.

#

Well, anyway, it's a thing.

#

Which I will try to update.

#

I mean, like.... MagTag. Not sure there should be any on that one.

#

Metro might have them all. We'll see.

leaden walrus
#

yep

#

you're probably seeing copy pasta

pallid grail
#

I'll have to guess on QT Py based on the schematic.

#

Yeah sure looks like it.

leaden walrus
#

having them in there doesn't really break anything

pallid grail
#

Fair enough.

leaden walrus
#

it's more implicit - by having them in there, it implies they are available, which they may or may not be, depending on board

pallid grail
#

Ah ok

#

Still, seems confusing.

leaden walrus
#

and then it also affects prettypins

#

prettypins assumes the arduino board def is true to the specific board

pallid grail
#

Ah ok

#

Yeah I knew that I guess

pallid grail
#

@leaden walrus Any reason TX/RX wouldn't work as touch pins on a Feather ESP32-S2 with TFT? They don't appear to be used anywhere else on the schematic, like SCL/SDA for example. The TFT is SPI.

rancid heath
#

The latest 1.3 in display SSD1306 now has a STEMMA connector. Since the QT-PY microprocessor also has a STEMMA connector is there any reason the QT-PY will not work with the SSD1306 using Arduino IDE?

charred dust
#

is STB and LAT the same?

north stream
#

STB is "strobe", and LAT is "latch", so basically yeah

native elbow
# livid osprey Should be the same concept, just use I2C_POWER as a pin. The definition should b...

I'm using this AHTXO example code: ```#include <Adafruit_AHTX0.h>
Adafruit_AHTX0 aht;

void setup() {
Serial.begin(115200);
Serial.println("Adafruit AHT10/AHT20 demo!");

if (! aht.begin()) {
Serial.println("Could not find AHT? Check wiring");
while (1) delay(10);
}
Serial.println("AHT10 or AHT20 found");
}

void loop() {
sensors_event_t humidity, temp;
aht.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data
Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C");
Serial.print("Humidity: "); Serial.print(humidity.relative_humidity); Serial.println("% rH");

delay(500);
}```
How do I use I2C_Power as a pin in this example? I apologize I'm super new to Arduino and given that I don't see any other code examples using Arduino for the ESP32-S2 Feather I'm at a loss

#

I realize Arduino is not the best use for this right now, just trying out some basic things while support for ESPHOME on ESP32-S2 is fully there

vivid rock
livid osprey
#

Honestly, Adafruit typically gives circuitpython boards more attention with regards to circuitpython first, so if you’re looking to do a quick test, that might be the faster way to get the esp32 s2 off the ground.

#

I can’t explore the limits of the arduino side since I don’t actually have one of these boards. Everything I know is basically verbatim from the learn guides…

brazen falcon
#

However I haven't stared at the schematic for that particular board so take that with a grain of salt.

pine bramble
#

Does anyone know how to send the row number inside HTTP request if I want to PUT or DELETE a certain line in google sheet

north stream
#

It looks like it's encoded in the URL you send the PUT request to, in A1 notation.

gilded gazelle
#

@odd fjord, I think you were who helped me a couple days ago, here are pics of the "socket" I created

20211201_134403.jpg 20211201_134352.jpg
odd fjord
gilded gazelle
#

this is just to play with flashing, hrrrmmm how do I search old posts

odd fjord
#

I think it was @livid osprey

#

in the top right there isa search window -- type in AL_hx2 and search for your posts

gilded gazelle
#

derp, I somehow missed the big search window, gonna go get my dunce hat

leaden walrus
#

there are filters too, like from: and mentions:

odd fjord
#

it has limited capabilities

leaden walrus
#

^^ and that

gilded gazelle
#

thanks guys!

odd fjord
#

It would be nice to be able to search content

gilded gazelle
#

@livid osprey , thanks

pine bramble
#

that,s what I did when I joined a discord for a minecraft discord instead of asking bazillions questions I'd search in their archives that way

odd fjord
#

How do you dump history?

pine bramble
#

I don't know if server admins have control over how old the history is or if it's limited by discord staff or if it even still work (haven't had to do it for months)

#

but it's usually better than the discord search feature because you can grep and regrep in the huge text file

odd fjord
#

Sounds lie a good approach -- thanks!

median mica
#

I know it’s an old product, but I have a 5V trinket(ATTiny85) that will not enter bootloader mode. I followed the guide. The red light is barely bright for as long as I tap the reset button, then it’s off. Did my trinket die?

#

Also, I followed the guide to repair the bootloader

livid osprey
#

Did the bootloader successfully repair?

median mica
#

Yes. That’s what the serial monitor told me. Just like the guide.

livid osprey
#

What are you connecting the device to?

#

I remember the device is old bit-bang style, so it's really picky about USB ports?

median mica
#

I tried both usb from the computer and also tried thru a usb hub

livid osprey
#

Something about not liking Linux or USB3....

#

Hrm.

median mica
#

Let me try again, USB3 interesting

livid osprey
#

Yeah, you could also make sure that your hub isn't USB3. I know at the time of the guide's writing, USB3 hubs weren't really a thing, but a newer hub could be a problem for the Trinket.

median mica
#

That was it! Thanks. I found an old USB2 hub and it worked perfect.

gilded gazelle
#

RE: ESP8266-s3 how safe is it to pull pins hi/lo without a resistor? Only for flashing, not use. I cant find a chassis to yank one from.

sour turtle
#

I'm very new to this so i'm not sure if i'm using the right terminology.

Let's say i have 12 RGBW neopixels in my project, according to their site they need a max of 60mA. If i just use the current provided by the usb connection, what will happen when i use all 12?

Am i at risk of damaging anything? Or will they just not light up as bright as they could be

native dagger
#

60 mA per led if that wasn't clear in the documentation

#

But that's at full brightness

sour turtle
#

Yes, 60mA per led

native dagger
#

What happens depends on your brightness. I wouldn't recommend it.

#

Either way

#

Like it might be ok, but a separate, higher rated power supply (with a 1000 uF cap across the power line) is best

gilded gazelle
#

best case, things wont work, worst case you melt your usb port

native dagger
#

Yeah its not worth the risk imo

sour turtle
#

I'm trying to reverse engineer a device that only uses usb, so i'm trying to understand what they did

native dagger
#

Hmm

#

Usb from a computer or from a power brick?

gilded gazelle
#

if they have a limiter on the brightness

sour turtle
#

Usually i'd go the route of trying it out and seeing what happens but i don't like the idea of damaging components

#

From a computer

native dagger
#

Hmm they probably have brightness tightly controlled. How critical is it that your device works from a USB port on a computer?

gilded gazelle
#

I have a dead hub due to a short

sour turtle
#

It's a controller, if i need a seperate power source it wouldn't be worth making for me

native dagger
#

Hmm well you can do it, but I would recommend developing with a separate psu and then testing your current at the highest load.

gilded gazelle
#

did they use neopixels on what you are revEing? or different rgb(w)

native dagger
#

Before switching over to the computer power

gilded gazelle
#

use a powered hub thatway you dont hurt desktop

sour turtle
native dagger
#

If you don't have a DC current capable multimeter this is a great excuse to upgrade

sour turtle
#

I think it's a RGBW neopixel but i can only see this one

sour turtle
#

You both suggested the same, so i'm thanking both

gilded gazelle
#

yw

livid osprey
# sour turtle

Oh, they usually keep those keeb LEDs at a pretty low brightness. I don’t think they ever push any single channel past 15%…

#

Unfortunately that’s software controlled, so not a lot of good ways to confirm

sour turtle
#

I have the software, or a version of it

#

I'll look into it and come back if i'm not able to figure it out :)

gilded gazelle
#

will I melt the 8266 if I short pins hi/lo instead of using a resistor?

pine bramble
#

what's a 8266?

pine bramble
#

on the positive side if it happens you'll be one of the rare person to have seen iron hot enough to turn into gas

cedar mountain
gilded gazelle
#

not sure how to connect this module to the usb/ttl

#

everything is on the esp-1 , esp12F , nodemcu, but nothing on the esp8266-s3 other than datasheets

#

I tried any combo of hi/lo for en & io0

#

no RST on this module

#

using a cp2102

#

so yes I am setting input hi/lo

#

anyone have experience setting bootmode on this particulare 8266?

gilded gazelle
#

?

livid osprey
#

Just compare the GPIOs on your module to the GPIOs on the ESP8266EX datasheet, and you can semi-reverse engineer a lot of lower-level functionality that way.

gilded gazelle
#

thank you @livid osprey

gilded gazelle
#

that gave me what I needed to find progress, it flashes now but hangs @ Leaving...
Hard resetting via RTS pin...

livid osprey
#

Oh, by that point flashing is done, and the RTS just isn't resetting the system. Just unplug/replug and you should be set.

gilded gazelle
#

ok

wet cairn
#

can I run a FONA and a Feather off one lithium battery by connecting their BAT and GND pins?

#

will it explode?

wet cairn
#

<@&617066238840930324>

north kelp
#

@wet cairn Which FONA?

wet cairn
#

Feather m4 CAN

north kelp
#

If it’s that one, it has its own charge circuitry, as does the feather. I wouldn’t connect one battery to two charge circuits. There might be another solution, like somehow disabling one of the charge circuits.

wet cairn
#

OK

#

thanks

exotic mason
#

Hello, I am trying to create sound-reactive LEDs using QT PY board. Still learning the basics. Can someone explain why the code on the left does nothing, while the code on the right lights up the on board NeoPixel? On an Arduino site, I read "pinMode(4, INPUT_PULLUP)" must be used on M0 and M4 boards (like my QT PY board).

Screen_Shot_2021-12-04_at_8.22.58_AM.png
vivid rock
exotic mason
#

Thanks, first time here. Trying to discern the best place for my question.

zinc bridge
#

When using the Arduino frameowrk with ESP32, how do I tell when configTime() has successfully updates the time?

cedar mountain
surreal pawn
#

What small adafruit boards are there that have bluetooth and an IMU? I'm thinking feather sized or smaller ideally.

leaden walrus
surreal pawn
#

yep, precisely

leaden walrus
#

you'd need to do some additional work, software-wise, to create an IMU, but it at least has most (all?) of the basic sensors needed.

surreal pawn
#

that feather is pretty much a clone of the "arduino nano 33 iot sense" but it's in stock https://store-usa.arduino.cc/collections/boards/products/arduino-nano-33-ble-sense

Arduino Online Shop
Arduino Nano 33 BLE Sense

The Nano 33 BLE Sense (without headers) is Arduino’s 3.3V AI enabled board in the smallest available form factor: 45x18mm! The Arduino Nano 33 BLE Sense is a completely new board on a well-known form factor. It comes with a series of embedded sensors: 9 axis inertial sensor: what makes this board ideal for wearable dev

#

(and has a lipo plug and neopixel and no microphone)

leaden walrus
#

also search the learn system for "AHRS" (Attitude and Heading Reference System)

surreal pawn
#

oh neat, thanks

leaden walrus
edgy wasp
#

Hi, new user here. I have what may be a bricked Adafruit Mag Tag (esp32). Where is the best place to go to find any possible fixes for it?

safe shell
#

@edgy wasp what happens to the LED/NeoPixels when you press RESET?

#

also, if you press-and-hold BOOT, then press RESET, (then release RESET, then RELEASE BOOT) does it enumerate in your list of USB devices?

edgy wasp
#

It was flashing the neopixels purple. We have gotten access to the file system now, so I may be good. But I spent 30 minutes trying to get there.

brazen falcon
# surreal pawn What small adafruit boards are there that have bluetooth and an IMU? I'm thinkin...

Its not an Adafruit product, but: https://www.seeedstudio.com/Seeed-XIAO-BLE-Sense-nRF52840-p-5253.html

Seeed XIAO BLE nRF52840 Sense - TinyML/TensorFlow Lite- IMU / Micr...

Seeed XIAO BLE nRF52840 Sense is a tiny Bluetooth LE development board designed for IoT and AI applications. It features an onboard antenna, 6 Dof IMU, microphone, all of which make it an ideal board to run AI using TinyML and TensorFlow Lite.

#

Not gonna get much smaller than that.

surreal pawn
autumn karma
#

I've been working with an old digispark-tiny clone (ATTINY85) I had floating around. Apparently this sucker runs with a 16Mhz external clock. Is there a way to change this to reference the internal 1Mhz clock instead and validate it's working as expected?

#

I should also note I'm using VSCode with PlatformIO. I think there is a platformio.ini variable I might be able to adjust.

pine bramble
#

start.atmel.com might be helpful there.

#

attiny85 not listed there but a similar part number is.

#

and this from the manual pretty much seems to bar it: "The AVR CPU is driven by theCPU clock clkCPU, directly generated from the selected clock source for the chip. No internal clock division is used."

autumn karma
#

I'll take a look around those video guides. I think there is this 'board_build.f_cpu = 16500000L' parameter in the configuration file too.

pine bramble
#

I did some bare metal clock work using the start.atmel.com approach.

autumn karma
#

I'm sorry, I just want to make sure I understand what your saying here too. Is that a web link or a library or sorts?

pine bramble
#

a guy named Jake Read did a SAMD51 project and wrote some good code wrt some of this stuff.

#

start.atmel.com is a web site.

#

It's a GUI configuration tool that generates files you can download (maybe in the .ZIP archive format).

#

Once you have it downloaded you compile it on your own computer.

#

(complete source code example that you custom generate)

autumn karma
#

OK gotcha, I saw the site but wanted to confirm. It looks pretty neat actually. The main guide video on the site is similar to what I'd like to mess around with at the end. An ADC with an interrupt of sorts.

pine bramble
#

Once you set the main clock then you have to configure serial communications to work with that clock, on at least some chips (if not all of them).

#

Easier: bit-bang the output (send serial data but do not try to parse inbound keystrokes at all, for example).

#

That way you can probe the state of the program with a bit more nuance than blinking an LED.

#

(print typewritten messages you authored yourself)

#

That's really not too bad if you have an oscilloscope to prototype with.

autumn karma
#

yeah, an oscope is like a must here. I have one and I basically just toggle a pin to get the timing information.

#

Sadly, I can't really use a serial port as a method to debug. This chip has very little memory, and a custom library to bit bang through the USB port would be needed with a ton of other timing related issues that could occur.

#

Better to just toggle a pin and measure with an oscope.

pine bramble
#

well we had 768 bytes of RAM on C8051F330D from Silabs iirc and 8kb flashROM.

#

some fairly serious code ran on that platform. ;)

#

including a serial bootloader placed in flash using the C2 debug interface on an uninitialized MCU.

#

(serial bootloading to reflash many times, after)

autumn karma
#

if your creative enough, you can really push a chip to it's limits even if they are little to begin with. It looks like this ATTiny85 has 512 bytes of RAM and 6012 bytes of flash. Both of these chips seem pretty similar.

pine bramble
#

It'd be more appealing today if there were nothing better out there at a modest price.

#

The 8-bit factor I see as a plus, though. ;)

autumn karma
#

what makes 8-bit a plus in your mind? And yeah, I bought a few of these chips like 5 or 6 years ago. I have a small project I think I can use this for instead of getting another chip.

pine bramble
#

I have at least 19 of the 25 C8051F330D chips I bought during the brief window when they made and sold 'em. ;)

#

The only DIP packaged MCU Silabs had that I was aware of.

#

(DIP-20 iirc)

autumn karma
#

do you create your own PCBs then for each of your projects? Or do you have a general development board you just slap a chip on and call it a day?

pine bramble
#

Well a 32-bit machine uses 32 bits of RAM (contiguous) as a storage unit.

#

So the memory address space is divided by four.

#

I think.

#

64 kb works out to 16 k useful addresses.

#

But many programs do not allow you to go past the 64 kb boundary.

#

So the programs are 1/4 in size.

#

I think that's correct.

pine bramble
#

otherwise 8 bits chips would be limited to 2^8 bytes of memory ie: not even 0.5kb

#


0000 0001 0002 0003 0004 0005 0006 0007
0008 0009 000a 000b 000c 000d 000e 000f << 16 bytes
0010 ...

#

The first storage unit stores data in 0003 0002 0001 and 0000.

#

Read right to left.

#

When you read a dump, you find the four-byte boundary and read right to left to get what's stored there.

#

You can pack it tighter but compiled programs don't work that way, overall.

autumn karma
#

this is all new to me, but is this the method of how a compiled program is stored in flash (8-bit compared to 32-bit)? wouldn't it make sense to have every byte of information jammed right next to each other?

pine bramble
#

They don't do it that way.

#

For an 8-bit MCU it's not an issue.

#

If I store 1, 2, 3 and 4 the ram dump looks like this:

00 00 00 01  00 00 00 02   00 00 00 03  00 00 00 04
autumn karma
#

ok, what would it look like for a 32-bit? wouldn't there just be extra null bytes?

pine bramble
#

If I store 0xc0ffee 4 times it looks like this:

00 ee ff c0  00 ee ff c0   00 ee ff c0  00 ee ff c0
#

Maybe the 00 is on the lsb side I've forgotten.

# 
ee ff c0 00   ee ff c0 00   ee ff c0 00   ee ff c0 00
#

I don't have it memorized as I have memory dumps to intuit this.

autumn karma
#

hold on, I think I know what your trying to say here. So for a 32-bit system, to store a decimal 1, 2, 3, and 4 in memory (big endian) it would have to be something like:

00 00 00 01  00 00 00 02  00 00 00 03  00 00 00 04

but for a 8-bit system, it really should only need to be:

01 02 03 04
pine bramble
#

Yup.

#

Each hex digit is four bits wide.

#

This: E0 03 00 20

#

is actually this: 0x200003E0

autumn karma
#

yeah. and I know even with an 8-bit system you COULD store 16-bit information and do mathematical work with it. The only issue is that it would need to do two step comparisons in 8-bit chunks, where as, 16-bit would do it in one

#

same applies for 16-bit system doing 32-bit mathematics with data.

autumn karma
pine bramble
#

So that's correct. 0x200003E0 is stored as I show it.

#

Reading right to left. "It is swapped and is grouped in two hex digits"

#

(8 bits)

#

So this is how a full 32-bit address appears in your program.

#

The problem is, much of everything else does, as well. ;)

#

I'm not really sure on that; other than that's my overall impression from having done disassembly.

#

At the very least, your program is just peppered with 32-bit addresses.

#

I haven't yet hit the 64 kb boundary to see how bad the problem really is and what (if anything) can be done to treat for it.

#

Seems to me the upshot is: you get 16,384 storage 'units' for your lower 64 kb storage (below the 64 k boundary).

autumn karma
#

Hey, is there a register on this ATTiny85 I can read to see what the flash fuses are currently set to?

north stream
#

I'm pretty sure there is

supple quest
#

alguien pudo conseguir controlar un foco inteligente con Arduino ESP8266 mediante WIFI

brazen falcon
#

adjust -c option to suit what programmer you're using

autumn karma
#

sweet, thank for the info!

autumn karma
#

ugh, so I'm having some issues trying to enable an interrupt for the ADC circuitry for this ATTiny85. This is the code I have so far:

void setup() {
  pinMode(DEBUG_PIN, OUTPUT);

  //ADC Multiplexer Selection Register
  ADMUX |= (1 << ADLAR); //Left adjust 10-bit result leaving 2 LSBs in ADCL register
  ADMUX |= (1 << MUX0);  //Internally connect PB2 (A1) input to ADC circuitry

  //ADC Control and Status Register
  ADCSRA |= (1 << ADEN);  //Enable ADC circuitry
  ADCSRA |= (1 << ADSC);  //Begin a single analog conversion
  ADCSRA |= (1 << ADATE); //Enable auto trigger for 'free running' continuous mode
  ADCSRA |= (1 << ADIE);  //Enable ADC interrupts to occur whenever a conversion completes
  ADCSRA |= (1 << ADPS2); //Sets prescaler division factor to 64, combined with next line
  ADCSRA |= (1 << ADPS1); //(8MHz / 64 = 125kHz, where ADC within 50-200kHz for best resolution)

  //AVR Status Register
  SREG |= (1 << SREG_I); //Enable global interrupt to allow interrupts to occur
}

ISR(ADC_vect) {
  PORTB &= (1 << DEBUG_PIN);
  PORTB |= ~(1 << DEBUG_PIN);
}
#

am I missing something or attaching the interrupt correctly? I just want to see if a pin can be toggled with an oscope attached to it.

pine bramble
#

Hello, i am using the NEO 6m GPS module with arduino and TinyGPS++ library, it's giving me the time output but the time is wrong, Only the hours are wrong the minutes the date is fine, So i wanted to know is there any method of configuring that time? How does that time work? Does it gets fetched from the nearest satellite? if it does then why the Time is still wrong even after i tested it in other country

rough torrent
#

I'm pretty sure the time is in utc, not in your local time zone.

#

Check for that

gilded gazelle
#

OST orbit standard time

willow viper
#

Um can anyone explain how exactly does adafruit unified sensor driver works ?
Though it's not related to arduino but could be useful to know how it works

#

I've gone through the guide
So far is it an oops concept for sensors?

odd fjord
#

OK -- I guess I misunderstood what information you are looking for

willow viper
#

Ah
I just want to know the concept behind the unified sensor driver

odd fjord
willow viper
#

It is
But I got confused on the practicality

Let me get this right

This driver is treating all sensors as same
If there are like two sensors in the same device a unique id is assigned to both to differentiate the sensors
the driver has two key functions, one that reads the data from the sensor and the other the general info of the sensor

Is that it ?

livid osprey
#

It's not that this driver is treating all sensors the same, but rather defining a standard framework or interface for making sensors interchangeable without too much extra code. It provides a structure for defining units in the driver so users don't have to manually write the code to convert analog voltages or serial data to a human-readable SI unit.

odd fjord
#

It also means that you can change to a different model (manufacturer) of the same type of sensor with minimal code change necessary.

livid osprey
#

In other words, the driver doesn't treat all sensors the same, but it allows the user's code to treat similar sensors the same way.

#

So each separate device still needs its own driver, but if implemented properly, you would only have one definition and one driver to replace*/add* if you ever needed to switch to a different sensor.

willow viper
#

ah so basically it cannot be applied to all sensors ?

livid osprey
#

It can be applied to any sensor that senses any of the supported sensor types. However, some less-common sensors may require you to write your own driver for it.

willow viper
#

what about sensors that follow a different protocol ?
I know most sensors are of I2C

#

im actually trying to implement this method in a RISCV FPGA side and taking this as inspiration

livid osprey
#

Since all the sensor readings and conversions are being handled in the driver, the protocol would not be an issue for this.

willow viper
#

its like driver gets the data
the unified driver converts that data to human language ?

north stream
#

More like it abstracts the details of the different sensors and lets you access them similarly.

willow viper
#

oh
so drivers are fixed
the output from that driver gets converted to that human language data ?

how does it know which driver is it using ?

#

like the BMP_U

trail swallow
#

I'm getting confusing results from ```void setup() {
Serial.begin(9600);

pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);

while (!Serial) {
digitalWrite(LED_BUILTIN, LOW);
delay(100);
digitalWrite(LED_BUILTIN, HIGH);
delay(100);
}

Serial.println("Startup");
scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
Serial.println("Started");
}``` - I'd expect to see "Startup" and "Started" or at least the first one, or the LED on this HUZZAH blinking, but I just see unprintable characters over serial. Has anyone seen this before?

unknown.png
livid osprey
livid osprey
trail swallow
#

I wouldn’t expect that to change serial behavior.

livid osprey
#

Serial could be a lot of things. First thing I would've suspected would be a baud rate issue, but the numbers look like they match. How is your Feather connected to your serial monitor?

trail swallow
#

A USB cable

livid osprey
#

Even too long a cable can affect output

#

How long? What kind?

trail swallow
#

I just uploaded code with it so I don’t think that’s it

livid osprey
#

Hmmm

#

Oh, ESP8266?

#

I remember something being wrong with clock divisors or something before

trail swallow
#

Ooh, weird, I’ll try that, thanks.

trail swallow
#

Using 74880 in both places was what worked in my case.

#

9600 is working now, as well. As to why... I do not know.

livid osprey
#

74880 is just a weird magical number for Espressif. Why or how is anyone's best guess....

trail swallow
#

That's unsettling.

#

Do you know of something ESP8266-ish that's more robust?

#

The ESP8266 ecosystem with things like esphome and wled is hard to beat, but the low memory and high power consumption are pretty rough.

livid osprey
#

ESP32 would be the way to go. Much better memory, and added ULP and deep sleep functions for saving power.

#

Essentially the same ecosystem, but much better specs all around.

trail swallow
#

Oh wow! Very nice. I hadn't realized the ESP32 was a sequel. I had... actually assumed that more numbers meant more recent. :o

#

I see the ESP32-S2 also exists but is very early days.

livid osprey
#

I wouldn't say VERY early, it's pretty stable now and people are starting to develop for an ESP32-S3 eval board...

#

The ESP32-S2 does have the added benefit of being supported by Circuitpython, if you're interested in that.

trail swallow
#

I think I got it confused with something that didn't have Arduino support.

vivid rock
#

that would be esp32-s3

livid osprey
#

The non-S2 is actually more powerful than the S2, and packs bluetooth in there as well. No CP, but it's got a dual core proecssor with a 240MHz clock speed or something

#

ESP32-S3 isn't supported by Arduino yet, but is in the works. The ESP32-S2, on the other hand, is all over Adafruit's product lineup. Magtag, feather, etc...

trail swallow
#

Interesting. I get the sense I stand at a crossroads between continuing on WiFi and moving to zwave or zigbee for home automation.

trail swallow
lavish glen
#

Hey quick question, got an HUZZAH32 ESP32 over here. Going through the docs atm and on one page it says that once WiFI has started ADC #2 can only READ analog inputs, but then in the FAQ it says it can't once Wifi started. So, which one is it?

solemn cliff
willow viper
#

Ok just to be clear
Is this how the unified sensor works ?

20211207_155113.jpg
safe shell
vivid rock
#

Can anyone comment on advantages/disadvantages of each of them? Which one should I use for my project?

livid osprey
#

This is from 7 months ago, so might not be totally up to date.

vivid rock
#

Thanks!
do you have some personal experience with either core?

livid osprey
#

I haven't used either extensively past some VERY basic sketches, so I don't have a direct comparison to make, I'm afraid.

pine bramble
#

@vivid rock Go with Earle initially.

#

If you know and like CMake you can use the pico-sdk natively.

vivid rock
#

well... I know little of it and what I know, I don't like :)

pine bramble
#

CMake was a hard learning curve for me.

vivid rock
#

I could do it this way if necessary, but I'd prefer simplicity of Arduino IDE setup

#

I will try Earl's core then

pine bramble
#

Multi-core example:

clear fog
#

Would anyone be able to help me with understanding if loops on a esp32?
having trouble figuring out how to exit a loop

faint raft
clear fog
#

yes C

#

I'm trying to have the while loops run until a new character is sent via Bluetooth

#

but at the moment it does not go and recheck the inData string and just loops forever

faint raft
#

well, you can use break to exit out of the loop

clear fog
faint raft
#

So, what do you want this code to actually do?

#

Let's start there, and then let's address the loops and whiles and stuff.

clear fog
faint raft
#

but, why are you looping here waiting for b or a?

clear fog
#

I have a bluetooth app on my phone that has a number of buttons that will send: a or b

faint raft
clear fog
#

will be toggling some relays/transistor switches

clear fog
faint raft
#

hmm

#

so, loop() in itself already loops

#

so maybe try to remove the while loops and just do the reads that way?

clear fog
#

hmmm

sacred ivy
pallid grail
#

@leaden walrus What would make my QT Py RP2040 not show up as a serial port to Arduino? I tried bootloader and not mode. By "not" mode, I mean it's running whatever sketch shipped with it. Neither mode shows up on serial. Reset, restarted Arduino....

#

This isn't a good board to start with anyway because it doesn't have a built-in LED. But still. Grabbing a Feather anyway.

#

No port here either. Also running shipped demo.

#

I vaguely remember having to put these boards into the bootloader the first time after running CP to get them to show up properly to Arduino, but that's not this case.

leaden walrus
#

@pallid grail i don't think you get a port in bootloader mode, you'd need to drag a UF2 at that point. so may have something to do with whatever is currently on the board.

pallid grail
#

They're both running tester code.

#

And I'm not getting a port.

#

QT Py is NeoPixel swirl, Feather is NP swirl with blinky red LED.

leaden walrus
#

the demos may not create a port either

#

could toss circuitpython on

pallid grail
#

Bleh. Yeah ok.

#

Thanks.

leaden walrus
#

also try just leaving port unselected

pallid grail
#

Oh.

leaden walrus
#

the upload process is a little wonky. it creates a UF2, puts board in boot mode, copies UF2 to RPI-RP2, then resets

pallid grail
#

Error. No drive to deploy.

leaden walrus
#

hmm

#

manually put in bootloader mode first

pallid grail
#

That worked.

#

NeoPixel is still on because nothing told it to turn off 😄

#

But it's doing slow blink now.

#

I'm um.... not going to explain all of this in the template.

#

@leaden walrus Should I at least note the caveat that if it's the first time loading a sketch, you might need to bootloader? Because I think it's a thing when moving from CP to Arduino too....

#

"to bootloader"? what....? 😄

leaden walrus
#

probably worth it

pallid grail
#

Ok

leaden walrus
#

and can make it generic, like "if you get in weird state and can't upload, put in bootloader, make sure RPI-RP2 shows up, try again"

pallid grail
#

Oh good call

livid osprey
#

Isn't there a tool to convert an Arduino sketch to a UF2?

pallid grail
#

My idea was way more complicated than that.

leaden walrus
#

@livid osprey yes

livid osprey
#

Does that work for loading sketches to RP2040? Is it reliable?

pallid grail
#

I mean once you get past this, uploading normally is reliable.

#

This funky stuff is only on your "first" go, in my experience.

leaden walrus
pallid grail
#

Somehow read that as uf2cow.py and now I kinda wish it was.

#

ufmoo. (sorry)

leaden walrus
#

@pallid grail it ends up using uf2conv.py to "upload the sketch" and that ends up looking for the RPI-RP2 folder

pallid grail
#

Nothing is ever simple 😄

leaden walrus
#

python3 -I uf2conf.py --serial /dev/ttyACM0 --family RP2040 --deploy sketch.uf2

#

something like that is what is used to "upload the sketch"

pallid grail
#

Hah

#

Figures.

livid osprey
#

It does say on the product page that arduino core wasn't supported at launch, so I assume it should've come preloaded with micropython?

pallid grail
#

No, we've never flashed MP onto anything to ship it.

#

I don't know if these were launch-time boards or not.

#

Arduino core for RP2040's been functional for a while now.

#

Unstable, but functional. It's stable now.

#

Might have been good enough for tester code at launch though.

#

I don't remember what we shipped them with.

#

Maybe CircuitPython, really. Though that's rare.

#

These definitely weren't running CP though.

pine bramble
#

hello, i would like to know if anyone can help me with the Grove-W600 module. I managed to configure it in APSTA mode. Now I wish I could communicate with him from my cell phone. How can I do this? I am new to programming on Arduino. Excuse me for my English, I am French. Thanks in advance.

pallid grail
#

@livid osprey You around? And how's you're Arduino skills? I have a question 😕

livid osprey
#

Rusty, but somewhat existant?

#

Go for it

pallid grail
#

Ok

#

If I have a sketch, with a pin in it, that's a pin name, i.e. LED_BUILTIN, and the pins_arduino.h or whatever file it is in */variants/board_name/ that defines pins doesn't have that pin defined, will the sketch still load onto the board successfully? Or will it fail because the pin isn't found or some such?

#

Basically, that pin is 13, but the Blink sketch built into the IDE now has LED_BUILTIN as the pin.

#

But I checked the RP2040 boards, and Limor called it PIN_LED instead of LED_BUILTIN. And I'm wondering whether the code will still load, but just not work.

vivid rock
pallid grail
#

Although, I'm confused, because I guess I answered my own question - I loaded the basic blink sketch on this RP2040 and it's working.

#

Me too!

vivid rock
#

which core are you using?

pallid grail
#

Philhower core

# 
// LEDs
#define PIN_LED        (13u)``` from the variants/board_name/pins_arduino.h file for the Feather.
#

Basically I'm trying to make these guide templates that use the Blink sketch

#

and I want to say "open it from the IDE menu:"

#

but I'm wondering whether it will fail for some folks.

vivid rock
#

indeed

pallid grail
#

But it didn't just fail for me, which I really feel like it should have....

#

I can include a basic Blink sketch embedded into the template as code, but if I can use the built-in one, it would be easier....

#

Arduino isn't smart enough to simply equate a pin name with its default pin, is it?

#

i.e. LED_BUILTIN is really 13, so if it doesn't find the pin name, default to using 13 instead behind the scenes.

vivid rock
#

#define LED_BUILTIN PIN_LED

pallid grail
#

oh!!

#

You are magical

#

That makes more sense

vivid rock
#

😊

pallid grail
#

So we're still in the if-the-pin-isn't-defined-it-should-throw-an-error camp here overall.

vivid rock
#

yes

pallid grail
#

I'll check the ESP32-S2 boards and see if they all have LED_BUILTIN since that's what this template is for.

#

Thanks!

vivid rock
#

anytime

livid osprey
#

Actually, I don't think it'll necessarily throw an error. Pin 13 might be used across the board, as I believe that constant is built into the IDE.

#

I think it's only redefined for Arduinos that use a different pin for it.

pallid grail
#

Hmm.

#

But in that case, it'll at least work

livid osprey
#

If you try it with a Pico, for instance, I wonder if it'll show up on pin 13 instead of its actual LED (GP25)

pallid grail
#

(All the ESP32-S2 boards have LED_BUILTIN anyway.)

#

Pico pins file: #define PIN_LED (25u)

#

(I had the core pulled up already anyway)

livid osprey
#

I don't think there's any code inside the IDE to check for a PIN_LED definition and link that to LED_BUILTIN, but the Pico is definitely a board where that pin differs from Arduino default, so I'd use that to figure out what's actually happening.

#

I'd test it myself if I had Philhower Core installed, but I've been using Mbed OS for a while now, simply out of laziness...

pallid grail
#

No worries. The Pico would work because of that generic def in the Philhower core.