#help-with-arduino | adafruit | Page 78

stuck coral Oct 4, 2020, 10:59 PM

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Ew, messy code

reef ravine Oct 4, 2020, 10:59 PM

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lol, all the examples out there seem based on the elegoo example

north stream Oct 4, 2020, 11:00 PM

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i like elegoo

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lol

reef ravine Oct 4, 2020, 11:00 PM

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(and only control turning speed 🙂 )

stuck coral Oct 4, 2020, 11:01 PM

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This is way better IMO-

void stop() {
  digitalWrite(ENA, LOW);
  digitalWrite(ENB, LOW);
}

void rightDrive(uint8_t pwm, bool forward = true){
  digitalWrite(ENA, HIGH);
  digitalWrite(ENB, HIGH);

  if(forward){
    digitalWrite(IN2, LOW);
    analogWrite(IN1, pwm);
  }else{
    digitalWrite(IN1, LOW);
    analogWrite(IN2, pwm);
  }
}

void leftDrive(uint8_t pwm, bool forward = true){
  digitalWrite(ENA, HIGH);
  digitalWrite(ENB, HIGH);

  if(forward){
    digitalWrite(IN3, LOW);
    analogWrite(IN4, pwm);
  }else{
    digitalWrite(IN4, LOW);
    analogWrite(IN3, pwm);
  }
}

north stream Oct 4, 2020, 11:01 PM

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ok

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thanks alot

stuck coral Oct 4, 2020, 11:02 PM

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Oh wait they PWM ENA and ENB in their example... that shouldnt work, that example you linked to @reef ravine is wrong!

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Youre welcome

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Those pins cant output a PWM signal

north stream Oct 4, 2020, 11:02 PM

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wait what?

reef ravine Oct 4, 2020, 11:02 PM

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ALL the ones I found do it that way, ya just can't trust the Interwebs...

stuck coral Oct 4, 2020, 11:03 PM

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Well, wonder if you're the only one having issues with variable speed

north stream Oct 4, 2020, 11:03 PM

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idk

reef ravine Oct 4, 2020, 11:03 PM

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from the forum posts I'd say no...

stuck coral Oct 4, 2020, 11:04 PM

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Oh... but their ENA and ENB pins are different

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They are just using the H bridge wrong

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lol

north stream Oct 4, 2020, 11:07 PM

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it give me error

stuck coral Oct 4, 2020, 11:08 PM

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What is the error? I didnt compile it so thats quite possible

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Seems to compile for me

north stream Oct 4, 2020, 11:09 PM

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hope this is the correct one

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📎 2020.10.04-16.08.mp4

stuck coral Oct 4, 2020, 11:11 PM

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Ah, so you are supposed to, add my functions, keep the definitions, then change the rest of your code to do what

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You removed all the pin declarations

north stream Oct 4, 2020, 11:11 PM

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ok

stuck coral Oct 4, 2020, 11:12 PM

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What are you using to send IR signals to this? Another arduino?

north stream Oct 4, 2020, 11:13 PM

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no

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IR sensor

stuck coral Oct 4, 2020, 11:14 PM

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You mean transmitter? Like a remote?

north stream Oct 4, 2020, 11:14 PM

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yah

reef ravine Oct 4, 2020, 11:14 PM

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the kit came with the remote right?

north stream Oct 4, 2020, 11:14 PM

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yah

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but now its giving me this error

📎 unknown.png

stuck coral Oct 4, 2020, 11:15 PM

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Can I see what you are compiling? Pastebin please if you could

north stream Oct 4, 2020, 11:17 PM

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im sending u a vid

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its uploading one sec

stuck coral Oct 4, 2020, 11:18 PM

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I would like a code pastebin

north stream Oct 4, 2020, 11:18 PM

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ok

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one sec

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here

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https://hatebin.com/ccymbwrrqs

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📎 video0.mov

stuck coral Oct 4, 2020, 11:19 PM

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I just said to add my functions, do you want a new example that does exactly what the only one did?

north stream Oct 4, 2020, 11:19 PM

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sorry the vid laggy

stuck coral Oct 4, 2020, 11:19 PM

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You need a loop and void function to compile

north stream Oct 4, 2020, 11:20 PM

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ok

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lemme add that

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wait theres no remote

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or anything

reef ravine Oct 4, 2020, 11:21 PM

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What IoT sent was an example of how to change the code, not a complete sketch

north stream Oct 4, 2020, 11:21 PM

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lol

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oh

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now i get it

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ok

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ok

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thanks for your help so much @reef ravine and @stuck coral

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🙂

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and sorry cause i took alot of your time

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bye

stuck coral Oct 4, 2020, 11:23 PM

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You're welcome @north stream, if you want an example similar to what you had here it is with my code and the old functions removed- https://hatebin.com/rbytavqddg

north stream Oct 4, 2020, 11:23 PM

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ok

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thanks

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Bye

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:)]

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:}

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🙂

stuck coral Oct 4, 2020, 11:24 PM

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driveRight and driveLeft take in a speed and a boolean forward or backward and you can use them as you choose to do whichever direction. And see ya

north stream Oct 4, 2020, 11:24 PM

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bye

river osprey Oct 5, 2020, 12:41 AM

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Is it possible to use a charging backpack with the CPX? When I power it through the battery it tries to charge itself - I am used to using an itsy bitsy m4 which has a specific battery port...

stuck coral Oct 5, 2020, 1:32 AM

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When using the charging backpack, you have to use the battery port on the backpack not the bottom of the itsy bitsy

river osprey Oct 5, 2020, 1:37 AM

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IoT - yes, thank you, i've got the itsy-bitsy all good, it's the CPX that i'm having trouble with. Because it just has a VOUT - not a "usb" so basically if it's plugged in to the battery, it attempts to charge itself...

stuck coral Oct 5, 2020, 1:39 AM

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Got it. So what is the M4 doing in this?

river osprey Oct 5, 2020, 1:44 AM

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nothing - just noting that i've used it successfully.

stuck coral Oct 5, 2020, 1:44 AM

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And yeah, the battery backpack is for the itsy bitsy not the CPX, I dont really see a way to get them to work with each other

river osprey Oct 5, 2020, 1:44 AM

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I have a CPX attached to a Gizmo TFT and I want to utilize a charging backpack so that i can just have the user charge everything via USB then use an on/off switch

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instead of having to disconnect the battery to charge it

stuck coral Oct 5, 2020, 1:45 AM

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If you had a USB breakout, you could make it work

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https://www.adafruit.com/product/1833

USB Micro-B Breakout Board

Simple but effective - this breakout board has a USB Micro-B connector, with all 5 pins broken out. Great for pairing with a microcontroller with USB support, or adding USB 5V power to a ...

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But then you cant program the same port you charge

river osprey Oct 5, 2020, 1:45 AM

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I'm not concerned about the re-programming, and I might have to go that route...

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i am trying to fit everything into a fairly small enclosure - as it's for a costume...

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is there an itsy bitsy with bluetooth?

stuck coral Oct 5, 2020, 1:47 AM

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The ItsyBitsy nrf52840 express

river osprey Oct 5, 2020, 1:56 AM

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thanks - i wonder if this will work with the TFT gizmo - although I have other displays i could use... hmm... lots to consider... thanks you

safe shell Oct 5, 2020, 2:00 AM

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Looks like VOUT is like VHI on the Itsy https://learn.adafruit.com/adafruit-circuit-playground-bluefruit

Adafruit Learning System

Adafruit Circuit Playground Bluefruit

Circuit Playground Bluefruit: Everything amazing about Circuit Playground, now with the power of Bluetooth!

river osprey Oct 5, 2020, 2:03 AM

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Thanks Anecdata - i really would need the CPX to have a dedicated BAT / USB for this to work. Originally i thought my project was going to need the accelerometer and other items on the CPX, but it turns out I don't, so it'll actually be better for me to use an ItstyBitsy with a TFT breakout for faster processing, smaller packaging, and guarantee it will work with the charging.

safe shell Oct 5, 2020, 2:12 AM

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Processor speed is a good point. The backpacks do work really well with the ItsyBitsys, I've had a few in place for quite a while.

thorny lintel Oct 5, 2020, 3:05 AM

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Hey guys, I have an RFID 134.2khz implant and I am trying to turn the pin13 LED off and on with the chip

I purchased a 134.2KHz FDX-B EM4305 Reader and have connected it to my Arduino Nano and it reads the data on the chip fine through the Serial Monitor

I have found a sketch online that allows you to turn the LED off and on if you send 1 or 0 through the serial monitor on IDE, but how can I make it turns off and on if the reader reads the code that's on my RFID implant?

I've tried putting the string of numbers in but it doesn't work, if I put higher than the number 9 in the text goes from blue to black

Would really appreciate any help, has been quite daunting to google so far!

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Here's the code I am using, I just need to have the state 'x' be the data/numbers/string from the RFID chip

📎 unknown.png

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I assume the chip is using 0-255 data

And I also assume the sketch is using a different form of number "data" or whatever the term!

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This is the code I get back from my chip if I scan it once with the serial read sketch

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📎 120776575_1237072453343742_9080488010067212506_n.png

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Would appreciate any help 🙂

cedar mountain Oct 5, 2020, 3:08 AM

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So if you wanted to key off the first byte there, you'd be checking if (state == 170), for instance.

thorny lintel Oct 5, 2020, 3:09 AM

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I'll give it a change to 170 and see if it works

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📎 unknown.png

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Doesn't matter that the 170 is no longer blue, like the 1 was?

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Sorry for being disgustingly new

cedar mountain Oct 5, 2020, 3:10 AM

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But it's unclear how you will know to turn off the LED, since I presume the reader won't sent anything if it doesn't read a tag.

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You don't want it in quotes.

thorny lintel Oct 5, 2020, 3:10 AM

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There we go

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I was hoping it's just, "If read rfid data turn on, if read rfid data and LED is on, turn off"

cedar mountain Oct 5, 2020, 3:12 AM

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You can do that, your code just needs to keep track of whether the LED is on or off.

thorny lintel Oct 5, 2020, 3:12 AM

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Still not liking just 170, still also black rather than blue text, if that's an issue/signifies something

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Thanks for your help by the way, appreciate the time

cedar mountain Oct 5, 2020, 3:16 AM

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As written, the code will just blink the LED extremely briefly because any non-170 byte will turn it off. You would want something like:int led_state = 0; void loop() { if (Serial.available() > 0) { if (Serial.read() == 170) { led_state = !led_state; digitalWrite(13, led_state); } } }This will toggle the LED when it sees the first byte in the RFID tag sequence.

thorny lintel Oct 5, 2020, 3:17 AM

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Like I love you but I hate you

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Whole day

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WHOLE day

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Googling, searching, slicing premade code

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And in a single discord message you do it

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Ah man thank you, honestly thank you

cedar mountain Oct 5, 2020, 3:19 AM

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No problem. You described your situation well and provided everything necessary for a quick fix. 💯

thorny lintel Oct 5, 2020, 3:20 AM

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Either I'm smart or I've asked for help enough times to know how to format a question 😉

📎 video-1601867980.mp4

cedar mountain Oct 5, 2020, 3:24 AM

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Ha, neat! Our cyborg future in action! 🤖

pine bramble Oct 5, 2020, 7:13 AM

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not really an arduino question, but more an atmega328 question

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if I hooked up a 32. 768khz crystal to a 328p, could I use it as a low power RTC?

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basically the idea is to have a switch that turns the device "on and off"

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well, not really on and off, but switches between low power timekeeping mode and full power play mode

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it's going to need to last a while off of 2 AAAs, so power saving when not in use is key

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when you turn it "off", it should keep track of how much time has passed since you turned it "off", and when you turn it back "on", it will use the amount of time that passed to simulate game events

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ex: if it's been off for 2 hours, and your pet's food level decreases at 1 tick per 5 minutes, then decrease it by 24 when it powers back on

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giving the illusion that the hunger bar has been decreasing even while it's turned off

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i don't want to use a separate RTC for this as that will add more cost snx complexity to the project

north stream Oct 5, 2020, 12:33 PM

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This writeup has some useful information http://www.home-automation-community.com/arduino-low-power-how-to-run-atmega328p-for-a-year-on-coin-cell-battery/

Home Automation Community

Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell B...

An Arduino Uno runs less than one day on a 9 V battery because it uses about 45 mA current. Using an Arduino Pro Mini, with a simple modification, the power consumption goes down to 54 μA (0.054 mA)...

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Possibly also relevant: https://www.microchip.com//wwwAppNotes/AppNotes.aspx?appnote=en592059

AN2648 Selecting and Testing 32 KHz Crystal Oscillators for AVR Microcontrollers This Application Note summarizes the crystal basics, PCB layout considerations, and how to test a crystal in your application. A crystal selection guide shows recommended crystals tested by expert...

heavy slate Oct 5, 2020, 3:56 PM

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i use a TFT 2.8" no touch from china, but after use graphictest example , i receive a only white screen. PLs help me
my wire connect:
VCC-3.3v
GND
CS-10
RST-8
SDI(MOSI)-11
SCK-13
LED-3.3
SDO(MISO)-12

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here is the phenomenon

📎 e71ed1230ff430fee2bb5ad1d5255886.jpg

north stream Oct 5, 2020, 4:04 PM

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You probably need to connect more pins like MOSI (data), DC (data/command), EN (enable), and RS (reset).

heavy slate Oct 5, 2020, 4:13 PM

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You probably need to connect more pins like MOSI (data), DC (data/command), EN (enable), and RS (reset).
@north stream Sorry my fault for not complete comment, i already connect all pin of spi peripheral but only show white screen

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oh this flink 2 times, but after that it so the white screen =(((

north stream Oct 5, 2020, 4:23 PM

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What software are you using?

heavy slate Oct 5, 2020, 4:30 PM

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arduino IDE

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to compile code =))

north stream Oct 5, 2020, 4:34 PM

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What code are you using?

heavy slate Oct 5, 2020, 4:38 PM

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examples name graphicstest of this library
https://github.com/adafruit/Adafruit_ILI9341

GitHub

adafruit/Adafruit_ILI9341

Library for Adafruit ILI9341 displays. Contribute to adafruit/Adafruit_ILI9341 development by creating an account on GitHub.

north stream Oct 5, 2020, 4:45 PM

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Do you get anything on the serial monitor?

frosty thistle Oct 5, 2020, 6:44 PM

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Hi all, I have a TFT question also. I am running a HX8357 using the adafruit library + the GFX library. It works just fine, but it turns out that the draw to screen is blocking. (same project with the 4digit 7seg displays) and everytime it draws, it blinks the seven seg display).

Is there any way to operate this non-blocking?

stuck coral Oct 5, 2020, 6:47 PM

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You had a GPIO expander correct?

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Well, two of them

frosty thistle Oct 5, 2020, 6:51 PM

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yeah

stuck coral Oct 5, 2020, 6:51 PM

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Are they SPI or I2C? I forget

frosty thistle Oct 5, 2020, 6:51 PM

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I2C

stuck coral Oct 5, 2020, 6:52 PM

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Ah, so maybe, but you would probably need to modify the tft library.

frosty thistle Oct 5, 2020, 6:54 PM

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The TFT is running off the hardware SPI pins on the MCU

north stream Oct 5, 2020, 6:55 PM

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I suspect the TFT library sends the whole screen in a single, blocking, operation, which freezes the LED multiplexing while it's in progress. If so, the fix would involve rewriting the TFT library to send the data in pieces, and return control in-between to let you continue the LED multiplexing. That would be fairly involved, but I could well be wrong.

stuck coral Oct 5, 2020, 6:55 PM

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Depends on how much of the time is SPI transfer time

frosty thistle Oct 5, 2020, 6:56 PM

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I guess it could get worse, so far I am just writing a single string to the TFT. Plan is quite a bit more info being displayed.

stuck coral Oct 5, 2020, 6:56 PM

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See, Ive been thinking about this issue recently, micros have so much memory and processing the limitation in software is now IO. With that hardware it is technically possible to send a giant block of data over SPI while your processor sends I2C commands but the arduino software isnt really tailored to do that.

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Using DMA or direct memory access, what you want is totally doable, just with a higher level of skill involved and not with Arduino framework

north stream Oct 5, 2020, 6:58 PM

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I usually take the lazy way out and use a separate chip to do my LED multiplexing

stuck coral Oct 5, 2020, 6:58 PM

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Well, not that you couldnt do it, but the libraries are not written for it

frosty thistle Oct 5, 2020, 6:58 PM

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Gotcha. In my preliminary googling of if this was possible, I saw some things that possibly hinted at something like that. Thought I would pop in here were you all are familliar with the Adafruit libs I am using to see.

north stream Oct 5, 2020, 6:59 PM

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I'm not familiar with all the innards of all the libraries, hence my generalizing

stuck coral Oct 5, 2020, 6:59 PM

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Yeah, the answer to that question is, how much time do you want to dump into it, or just buy a dedicated hardware solution like bodger says

frosty thistle Oct 5, 2020, 6:59 PM

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like another mcu to run the LED's?

north stream Oct 5, 2020, 7:00 PM

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Something like a MAX7221 or HT16K33 to run the LEDs. You could use another MCU, but since there are dedicated LED controller chips available, I just use those.

frosty thistle Oct 5, 2020, 7:01 PM

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Ah, I see.

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I have not used the MAX before, but did come across it. It looked like I needed two to run a single 4d7s display, and was not sure if I could run two of those displays with four chips

north stream Oct 5, 2020, 7:02 PM

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The MAX7221 should be able to run up to 8 7-segment digits.

stuck coral Oct 5, 2020, 7:02 PM

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I think there are probably chips just for those 4 digit displays, they are popular

frosty thistle Oct 5, 2020, 7:03 PM

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I would be willing to try that route. Think it would solve this problem with TFT blocking?

stuck coral Oct 5, 2020, 7:04 PM

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No, but you wont need to constantly update the GPIO expanders with I2C

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Sadly many Arduino SPI operations are blocking

frosty thistle Oct 5, 2020, 7:04 PM

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Oh i see, that chip handles all that?

north stream Oct 5, 2020, 7:06 PM

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My thinking is that it would solve the "LED blinking" problem, as the LED driver would continue to update the display while the Arduino was busy.

frosty thistle Oct 5, 2020, 7:07 PM

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got it. Thanks guys, Ill see if I can find some with quick shipping!

plush pecan Oct 6, 2020, 2:45 AM

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Hi all, I may be overthinking this but I have 4 relay objects defined and I need to loop through and do the same action on all 4. What's the best way to do this with a FOR loop?

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//Startup Light Blink
relay1.blink(100,100,0,20);
relay2.blink(100,100,0,20);
relay3.blink(100,100,0,20);
relay4.blink(100,100,0,20);

north stream Oct 6, 2020, 2:52 AM

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Probably store the relay objects in an array and iterate through that. I don't know the type, so I'll just use "Relay" to illustrate: ```c
#define NRELAYS 4
static Relay relays[NRELAYS] = {
new Relay(1),
new Relay(2),
new Relay(3),
new Relay(4)
};

void setup()
{
int i;

for (i = 0; i < NRELAYS; ++i) {
relays[i].begin();
}
}

void loop()
{
int i;

for (i = 0; i < NRELAYS; ++i) {
relays[i].blink(100, 100, 0, 20);
}
}

plush pecan Oct 6, 2020, 2:52 AM

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@north stream you are my new best friend. thank you, seriously!

north stream Oct 6, 2020, 2:52 AM

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You can get even fancier and use pointer math, but that's a start

narrow jackal Oct 6, 2020, 4:20 AM

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Can control encoders track the degrees of a stepper motor? Or do I need a motor encoder?

unborn saffron Oct 6, 2020, 5:44 AM

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What are control encoders?

thorny current Oct 6, 2020, 6:03 AM

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 ets Jan  8 2013,rst cause:4, boot mode:(3,6)

wdt reset
load 0x4010f000, len 3584, room 16 
tail 0
chksum 0xb0
csum 0xb0
v2843a5ac
~ld```

Anyone know why my Arduino is resetting when I try to run the "Sweep" code with a Servo? It's a Wemos D1 Mini

leaden light Oct 6, 2020, 6:04 AM

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@north stream bro how we control air conditioner or tv type of things with node mcu but it have running on high voltage so how to control it

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Any one help me for this 👆

woven mica Oct 6, 2020, 6:15 AM

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You have to use a relay, but its dangerous to do with mains voltage.

leaden light Oct 6, 2020, 6:17 AM

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Relays used for fan light bulb etc but what about the instrument running on high voltages

woven mica Oct 6, 2020, 6:18 AM

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what instrument?

leaden light Oct 6, 2020, 6:20 AM

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Sorry for that i am asking for ac,tv

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@woven mica

woven mica Oct 6, 2020, 6:21 AM

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TVs still run on 230V AC

leaden light Oct 6, 2020, 6:21 AM

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Is ac and tv can run with relay

woven mica Oct 6, 2020, 6:22 AM

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Yes

leaden light Oct 6, 2020, 6:23 AM

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My friend tell me that there is need of protection circuit

woven mica Oct 6, 2020, 6:23 AM

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But its dangerous

plucky tundra Oct 6, 2020, 6:24 AM

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hi, i am using a bluno beetle for my project and the thing is, when i used usb to power my board, it can send packets with readings from a MPU6050 with BLE but when connected to power supply of 4.8V, it can still send packet but the returning values are all 0 no matter how much we move the imu unit. does this imply that the MPU6050 isn't getting enough power?

woven mica Oct 6, 2020, 6:24 AM

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Well, what protection you need depends on where you live

leaden light Oct 6, 2020, 6:24 AM

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And how can be detect it from mobile because it has already transmitter and receiver

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So how we detect that 🙄

woven mica Oct 6, 2020, 6:24 AM

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In europe we have earth safety connection

leaden light Oct 6, 2020, 6:25 AM

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Hmm

woven mica Oct 6, 2020, 6:25 AM

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@leaden light why dont you just buy Sonoff, its the exact thing you want

leaden light Oct 6, 2020, 6:26 AM

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Ohh really I never heard about that so 😅

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Ty for reply and solve my question 🙏

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@woven mica can know are you an engineer??

woven mica Oct 6, 2020, 6:27 AM

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Well, i am studying electronics

leaden light Oct 6, 2020, 6:27 AM

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Nice 👍,

thorny current Oct 6, 2020, 6:44 AM

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For the life of me I cannot control this servo with my arduino

pine bramble Oct 6, 2020, 7:04 AM

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probably a stupid question, but now does waking up the Arduino using a pin change interrupt work?

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tl;dr: I need the atmega to wake up in one of two ways

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first way is from TIMER2: this should be called every second by the asynchronous timer hooked up to a 32.768khz crystal

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all this ISR needs to do is increment a seconds counter and then go back to sleep

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the other way is from a pin change interrupt: upon the user hitting a button, I want the atmega to get out of sleep mode and turn back on, allowing the user to do stuff until they hit the button again, where it goes back into sleep mode

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so when the ISR finishes, does it go back to sleep? or does it continue to execute after the last sleep_cpu() call?

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nvm, looks like it continues executing after the interrupt

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is it safe to put it back to sleep while inside of the ISR?

wraith current Oct 6, 2020, 9:55 AM

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@thorny current show your code.

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@leaden light you don't need to deal with mains voltage. Just control an IR led and emulate the remote control for the AC and the TV. There is already an arduino library that deals with many AC units : https://www.instructables.com/Air-Conditioning-web-controlled-by-Arduino/

Instructables

Air Conditioning Web Controlled by Arduino

Air Conditioning Web Controlled by Arduino: Hello thereThe high temperature of this summer, make me think to this project. May be there are similar on the internet, but I didn't find.This project is based on arduino, and runs well on boards bigger than UNO, which has not so mu...

leaden light Oct 6, 2020, 10:35 AM

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🙏.

flat folio Oct 6, 2020, 3:32 PM

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Hi all, I am having very weird issues with two Adafruit Grand Central M4s. In short, its almost like they are corrupted or something. I have trouble uploading code to them, I always have to hit the reset button twice to upload. I can only sometimes access the serial monitor -- many times it will just freeze until I hit the reset button twice. After I am able to upload code after trying many times, its like the controller is only reading some code. I have some fairly basic code and sometimes it will not respect the delay command. Sometimes it won't respect the milis command. And sometimes it does nothing at all -- when this happens and when I can open the serial monitor, nothing comes across screen and nothing happens with my lights (using Neopixels). I can upload many variations of this same code I am using to a Metro and other controllers and it behaves normally. I recently saw the post on the adafruit forums to upgrade the bootloader which I have done but that does not help any. I have tried uploading from different computers and using different cables but nothing seems to fix the issue. Any ideas would be greatly appreciated... I am at my wits end on what to do. Thanks in advance.

elder hare Oct 6, 2020, 4:01 PM

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need som help with pinout here! im using this library -> https://github.com/mrfaptastic/ESP32-RGB64x32MatrixPanel-I2S-DMA (using the default pinout)

📎 unknown.png

GitHub

mrfaptastic/ESP32-RGB64x32MatrixPanel-I2S-DMA

An Adafruit GFX Compatible Library for ESP32 and HUB75 RGB LED Panels. Using DMA to drive the panel for higher refresh rates. - mrfaptastic/ESP32-RGB64x32MatrixPanel-I2S-DMA

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this is the ESP32 im using! now is it fine for me to use the default pinout?

📎 ESP32.PNG

green heath Oct 6, 2020, 4:23 PM

#

Do i need to limit the current coming into a buckdown from a 9 volt battery? My knowlegde tells me if i dont put in a current limiting resistor the current will be very very high. But i am unsure of what happens inside the buckdown

vivid rock Oct 6, 2020, 4:53 PM

#

@green heath the current through buck converter is determined by what you connect to its output. If you do not connect anything, current will be close to 0. If you use it to power microcontroller or similar electronics, it will be pulling maybe 200- 500 mA- not a problem.
In general, limiting current using resistors is not a good idea (with some notable exceptions like current limitng for LEDs).

green heath Oct 6, 2020, 4:54 PM

#

But what if i accidentally short it though? Should i use a diode for that?

vivid rock Oct 6, 2020, 4:56 PM

#

good buck converters usually have built-in short-circuit protection
but still, try to avoid shorting it

green heath Oct 6, 2020, 4:56 PM

#

Yeha i get that but i am that kind of person that can put a 5v output straight into a ground

#

And then only afterwards thing that maybe i shouldnt do that

vivid rock Oct 6, 2020, 5:01 PM

#

well, then maybe putting a 10 Ohm resistor on the input might work during your experimentation
but remove it once you have finalized your design

green heath Oct 6, 2020, 5:08 PM

#

📎 20201006_190800.jpg

#

I dont quite understand my buck tho

#

It had an enable, ground, common and adjustable. And a postive output

#

Along with with the array of voltages

#

I havent found any data sheet of it and i am totally lost

grand basin Oct 6, 2020, 6:11 PM

#

Hello, I need to use an interrupt in my program which stops my microcontroller from sending UART data to another device for the duration of the time I hold down a momentary push button. The other device is a DSP which has ‘patches’ that I can toggle through but my microcontroller which transmits serial MIDI crashes the DSP because it’s continuing to run the MIDI script.

I pretty much understand how to initiate an interrupt using the guide on the Arduino website, but I don’t know how to take that information to temporarily ‘silence’ the UART data, and arrange it so that it lasts as long as I have the button depressed. It sounds super easy I just haven’t found a guide to this specific application anywhere online. Can someone point me to where I can find this information? Thanks!

vivid rock Oct 6, 2020, 6:14 PM

#

create a global variable button_pressed ; in your interrupt routine, set this variable to true when the button is pressed and to false when it is released, and in the place in your progrma where you send UART data, add an if condition:

if (!button_pressed) {
    //send the UART data
}

#

just remember that the variable needs to be declared as volatile

north stream Oct 6, 2020, 6:16 PM

#

@green heath There are just 4 pins. Input voltage is hooked up with positive to IN+ and negative to GND. Output comes with negative from GND and positive from VO+. The enable input can be connected to the input positive to turn on the converter.

vivid rock Oct 6, 2020, 6:18 PM

#

@grand basin you would need to setup the interrupt as a change interrupt, so it is triggered both on button pressed and button released
and you would later need to worry about button debouncing

grand basin Oct 6, 2020, 6:20 PM

#

Okay great, thank you!

vivid rock Oct 6, 2020, 6:23 PM

#

of course, an even easier solution without any interrupts is just checking the voltage on the button pin before sending uart data:

if (digitalRead(PinButton)) {
    // send UART data 
}

assuming that the PinButton is declared INPUT_PULLUP and pressing the button pulls it low.

grand basin Oct 6, 2020, 6:25 PM

#

Oh, so this like putting a crimp in the hose on the UART pin being used?

#

pardon my crude analogies I'm still new 😆

vivid rock Oct 6, 2020, 6:27 PM

#

well, we are not doing anything specifically with UART pin, we are just not sending anything at all if PinButton is low

grand basin Oct 6, 2020, 6:29 PM

#

Oh great, got it. I'll give it a whirl!

tame hound Oct 6, 2020, 6:48 PM

#

Is anyone able to help me with arduino not being recognized by my computer

#

I connected it and it shows this on device manager

📎 Capture.PNG

#

"USB Serial Port"

#

I tried updating the drivers manually by choosing the file from the software called "drivers" but it didn't work

woven mica Oct 6, 2020, 6:50 PM

#

What arduino, issa clone?

tame hound Oct 6, 2020, 6:51 PM

#

It says RedBoard on it

#

Idk it's what my school provided

#

It uses the Arduino IDE platform

#

Except it's not being recognized on my computer

north stream Oct 6, 2020, 6:55 PM

#

An Arduino will show up as a USB serial port, as it uses serial communications.

tame hound Oct 6, 2020, 6:56 PM

#

Im not sure why the software doesn't recognize it however

#

It says Serial port not selected.

#

And it's not showing up in tools ----> Ports

north stream Oct 6, 2020, 6:57 PM

#

Ah, it should show up in Ports.

tame hound Oct 6, 2020, 6:57 PM

#

Yes

#

Which is the problem

#

I figured the issue out

#

I just searched up the drivers from online for the redboard and installed it and it worked

#

jesus that took 2 hours of my day

#

lol

north stream Oct 6, 2020, 6:59 PM

#

I'm glad you figured it out! It's annoying it took that long, I have days like that too.

tame hound Oct 6, 2020, 7:01 PM

#

Thank you, yeah such a simple issue tbh

strange ether Oct 6, 2020, 7:30 PM

#

@leaden light you don't need to deal with mains voltage. Just control an IR led and emulate the remote control for the AC and the TV. There is already an arduino library that deals with many AC units : https://www.instructables.com/Air-Conditioning-web-controlled-by-Arduino/
@wraith current hi! very helpful. but i wonder if there is the same project but in raspberry (cause rpi has wifi)

Instructables

Air Conditioning Web Controlled by Arduino

Air Conditioning Web Controlled by Arduino: Hello thereThe high temperature of this summer, make me think to this project. May be there are similar on the internet, but I didn't find.This project is based on arduino, and runs well on boards bigger than UNO, which has not so mu...

green heath Oct 6, 2020, 7:33 PM

#

@north stream okay but then how do i get the right voltage out of it. With that setup it just forwards the 9 volt

neon cobalt Oct 6, 2020, 7:39 PM

#

I'm new with electronics and I wanted to know which programming language an Arduino uses, which you recommend, how do I put code into a Arduino, and what do I use to make the code which is able to transfer the data to the Arduino?

grand basin Oct 6, 2020, 8:00 PM

#

@neon cobalt I'm not an Adafruit rep and I'm very new myself, but you use the Arduino IDE to program and upload your program to the Arduino hardware. The language is [based on?] C++

neon cobalt Oct 6, 2020, 8:01 PM

#

Thanks alot

north stream Oct 6, 2020, 8:13 PM

#

@green heath Maybe you have to solder one of the jumpers to set the output voltage?

green heath Oct 6, 2020, 8:14 PM

#

I found a picture on ali that told me to cut the adjustable and solder

#

But it didn't work

#

All around terrible design

#

😅

north stream Oct 6, 2020, 8:16 PM

#

It's a clever enough design, but not easy to use, especially without documentation

green heath Oct 6, 2020, 8:18 PM

#

Well

#

I either broke it

#

Fried it

#

Or soldered it wrong because it just forwards the battery voltage

#

Even the adjustable is unresponsive

north stream Oct 6, 2020, 8:19 PM

#

It could be that it's a boost converter not a buck converter

#

What kind of load do you have hooked up?

green heath Oct 6, 2020, 8:20 PM

#

9 volt battery

#

And i am measuring the output with a multimeter

#

Well i got it for free some work i did so nothing is lost

#

Well i am quite dumb i soldered ground to output

#

Input

#

Now i get 7 volt😅

#

My battery gives 7 volt now great

#

I am going to unsolder it and throw it away lol

neon cobalt Oct 6, 2020, 8:48 PM

#

What are adruino "UNO" used for?

north stream Oct 6, 2020, 8:50 PM

#

You probably need more load than a multimeter for it to regulate

#

You can use an Arduino Uno for all sorts of things, it's a versatile little unit.

neon cobalt Oct 6, 2020, 8:51 PM

#

Ok

green heath Oct 6, 2020, 8:57 PM

#

Well i am not going to plug it into my atmega if says 7 volt :/

pine bramble Oct 6, 2020, 9:36 PM

#

I’m using the standard “button cycler” example code given by adafruit Neo Pikel library and achieving very wired results.

#

The picture with the lights shown is RED

📎 image0.jpg 📎 image1.jpg 📎 image2.jpg 📎 image3.jpg 📎 image4.jpg

#

I’ve defined the proper amount of pixels in the strand.

stuck coral Oct 6, 2020, 9:37 PM

#

Looks like you are not using the right supply or logic voltage to me

pine bramble Oct 6, 2020, 9:38 PM

#

5v power supply at 3amps max draw

stuck coral Oct 6, 2020, 9:38 PM

#

What logic voltage are you using?

pine bramble Oct 6, 2020, 9:38 PM

#

Pardon?

stuck coral Oct 6, 2020, 9:38 PM

#

What voltage do the pins on that micro output? 3.3V or 5V?

pine bramble Oct 6, 2020, 9:40 PM

#

I have 5 volts coming into the arduino from the supply via bus bars, the 5v rail is connected to provide the arduino with power. No power is actually coming from the arduino. Common ground, and data. That’s it

stuck coral Oct 6, 2020, 9:40 PM

#

That doesnt tell me anything about the logic voltage, can you take a picture of the underside of that blue board you have pixtured for me?

pine bramble Oct 6, 2020, 9:41 PM

#

The blue board, like the arduino.

stuck coral Oct 6, 2020, 9:41 PM

#

Yes

wraith current Oct 6, 2020, 9:41 PM

#

@strange ether use an esp8266 board of you want wifi

stuck coral Oct 6, 2020, 9:41 PM

#

Either you are not using the right color config, the wrong logic voltage is used, that platform wont work with the selected library, or you have a bad connection

pine bramble Oct 6, 2020, 9:42 PM

#

📎 image0.jpg

#

But the library worked a few weeks back just fine, nothing has changed as far as I’m aware

stuck coral Oct 6, 2020, 9:44 PM

#

Okay, looks like a 5V arduino, 3,3V micros have a second regulator if I remember right. And this is a new issue? Same PSU?

#

Same code? Exactly

pine bramble Oct 6, 2020, 9:45 PM

#

Same code. It’s the basic button cycler example with define pix”es changed from 16 to 15 to fit my strand.

#

The power supply worked yes, same one

stuck coral Oct 6, 2020, 9:45 PM

#

DId you rewire it between then and now?

pine bramble Oct 6, 2020, 9:45 PM

#

Yes but everything is the same. I’m 100% sure if that

#

Of*

stuck coral Oct 6, 2020, 9:46 PM

#

Yes but it looks to me to be bad connection out of my range of options because from my neopixel experience the pixel count doesnt cause that issue because of how the protocol is laid out. Only other option I see is if you changed the LED type

pine bramble Oct 6, 2020, 9:47 PM

#

But here’s the kicker, with a different string of example code “RGBW strip test” it works fine.

stuck coral Oct 6, 2020, 9:47 PM

#

Well yeah

#

You changed the LED type

#

If those are RGBW leds, sending RGB data will do that

pine bramble Oct 6, 2020, 9:48 PM

#

But the button test worked prior without describing “RGBW”

stuck coral Oct 6, 2020, 9:49 PM

#

Sorry I misread, then you are sending RGBW dato to RGB or GRB strips (I forget which is the default)

pine bramble Oct 6, 2020, 9:49 PM

#

It seems GRB is default

stuck coral Oct 6, 2020, 9:50 PM

#

You should read how the data protocol works for those LEDs, then what I am saying will make perfect sense. So change the LED type back to GRB and let me know how that works

pine bramble Oct 6, 2020, 9:51 PM

#

We reinstalled the library, seems to be working, but what is the dif. In GRBW GRB and RGB. I’m still learning sorry if it’s obvious.

stuck coral Oct 6, 2020, 9:57 PM

#

So these LEDs have 4 pins, data in, data out, power, and ground. You connect data in of the first LED to your arduino, and the output of that goes to the input of the next LED. So you are just using this super simple protocol to send a 2d array over one line, where the first LED takes the first three (Or if RGBW 4) values it reads from the data input, then after it gets a value it just resends the rest of the data to the next LED, which will get the next 3 (or 4) bytes then pass it along until you get to the end of the strand until the arduino stops talking

#

So if you are say, trying to send a three long strip all greed GRB values, then the data would look kinda like - 0xFF, 0x0, 0x0, 0xFF, 0x0, 0x0, 0xFF, 0x0, 0x0

#

But if its a RGB LED, it sees red red red, not green green green

#

And if its RGBW, it sees red and white, blue, off

#

Does that make sense?

#

Are you sure those are GRB?

#

I see a blue and a white in the same element

neon cobalt Oct 7, 2020, 1:15 AM

#

why does the frequency matter in a arduino?

stuck coral Oct 7, 2020, 1:16 AM

#

I was reading your earlier conversation, so let me give a slightly different twist on what the person you were talking about said

#

A raspberry pi is a single board computer, it can run multi user operating system like linux or BSD, it has a lot of memory from 1-4GB, and is fast enough to run desktop or server applications. A arduino is a group of microcontrollers with specific software support with the arduino framework. Microcontrollers are basically entire computers on a tiny chip with a processor, memory, peripherals, and interfaces but they are very low power both from a power consumption standpoint and computational standpoint

neon cobalt Oct 7, 2020, 1:20 AM

#

Ok

stuck coral Oct 7, 2020, 1:20 AM

#

So if you wanted a microwave, all it needs to do is register button presses and run a basic display with some other control stuff, it makes no sense to put a whole computer in it, you want it to turn on instantly without the overhead of a multi user OS, and have it sip power. Luckily micros are tiny computers but for $3

#

So increasing the clock on a micro does the same thing as on your computer, it lets the micro step through an application faster

#

Like your computer or the pi, there is a processor clock speed with can increase to make your computer run faster, but it will consume more power

#

However, there are many thing the micros dont that the desktop CPUs do of course, like MMUs

neon cobalt Oct 7, 2020, 1:44 AM

#

How much memory can a Arduino hold from lowest to highest.

stuck coral Oct 7, 2020, 1:45 AM

#

UNO has 2KB, a feather M4 has 192KB, can go up from there

#

There are a few that are smaller than 2KB but most are within that range

#

The Arduino Portenta H7 has a whopping 1MB of RAM

neon cobalt Oct 7, 2020, 1:49 AM

#

Thank you

#

What are inputs - outputs?

stuck coral Oct 7, 2020, 1:54 AM

#

Inputs let you read a state, a output lets you set some sort of state. If you are talking in context of the arduino framework I imagine you are talking about the peripherals? Like setting a pin up as an input or an output?

neon cobalt Oct 7, 2020, 1:55 AM

#

In context of "Analogue"

stuck coral Oct 7, 2020, 1:58 AM

#

Well I assume you mean the pins, so on GPIO of a microcontroller, there are pins which can be digital or analog, and each can be set as an input or an output (there is more detail here, note this is simplified). So if I say set a pin to be an output, and its digital, I can use digitalWrite() to set a pins voltage to be HIGH or LOW. Or I could take an analog pin, and set it up as an input, and read a voltage from another device like say a battery voltage from a voltage divider with analogRead()

neon cobalt Oct 7, 2020, 1:58 AM

#

Thank you.

#

Do Arduinos work in ac or dc or both?

pulsar junco Oct 7, 2020, 2:09 AM

#

DC

neon cobalt Oct 7, 2020, 2:09 AM

#

ok

pulsar junco Oct 7, 2020, 2:09 AM

#

you can simulate AC output though

neon cobalt Oct 7, 2020, 2:10 AM

#

ok Thank you.

pulsar junco Oct 7, 2020, 2:11 AM

#

well actually you can control chips that simulate AC output, I'm not sure if you can do it with a bare arduino

neon cobalt Oct 7, 2020, 2:12 AM

#

Like digitally simulate ac current like a oscillator or physically create ac?

pulsar junco Oct 7, 2020, 2:14 AM

#

you can approximate a sine wave with some external components.

#

you need a negative voltage to do it so you can't do it with a bare arduino IIRC

#

*negative and positive voltages

neon cobalt Oct 7, 2020, 2:15 AM

#

Ok

strange ether Oct 7, 2020, 5:29 AM

#

@strange ether use an esp8266 board of you want wifi
@wraith current for arduino no?okey thanks

wraith current Oct 7, 2020, 8:18 AM

#

@strange ether yes, you can use the Arduino framework on esp8266 boards.

strange ether Oct 7, 2020, 8:35 AM

#

okey thanks

true nest Oct 7, 2020, 6:58 PM

#

I've got a TeensyLC that I think is dead. The board doesn't appear on my windows (no device connected sound) or linux (doesn't appear on lsusb output) machine. PROG + GND shows 3.3v, goes to 0v when button is pressed. I also get 3.3v and 5v on their respective pins. I've tried holding the programming button when plugging the USB cable in, as well as holding the programming button for 15 seconds. Is the board in fact dead?

north stream Oct 7, 2020, 7:11 PM

#

There's not a lot left. In the Teensy LC, the USB data lines are connected to the MCU pins via 33Ω resistors, so if the MCU has power and the clock is running, there ought to be some sort of response on USB. It is possible that it was loaded with a software configuration that prevents it from enumerating, or it's being held in reset, otherwise it seems like a hardware failure (could be as simple as a cracked solder joint).

true nest Oct 7, 2020, 7:16 PM

#

that's what I feared. i think I uploaded the wrong code for it. won't make that mistake again.

north stream Oct 7, 2020, 7:19 PM

#

If it's just the wrong code, it can probably be unbricked by flashing a new bootloader, however I don't know how to accomplish that.

neon cobalt Oct 7, 2020, 7:21 PM

#

what are the uses for the arduino lilypad

tall pine Oct 7, 2020, 7:23 PM

#

its meant for wearables and e-textiles. It can be sewn directly to fabric and you can use conductive thread to make a wearable circuit board almost

neon cobalt Oct 7, 2020, 7:24 PM

#

so is it machine washable?

tall pine Oct 7, 2020, 7:25 PM

#

I'm gunna go out on a limb and say no

neon cobalt Oct 7, 2020, 7:26 PM

#

ok

crystal fossil Oct 7, 2020, 7:28 PM

#

I would do further research, but from a quick google search, it seems that they are hand washable.

neon cobalt Oct 7, 2020, 7:35 PM

#

What is the arduino mega used for?

fresh pendant Oct 7, 2020, 7:54 PM

#

How do I use capacitive touch inputs on Feather M4 in Arduino?

odd fjord Oct 7, 2020, 8:20 PM

#

@fresh pendant Did you try Freetouch https://github.com/adafruit/Adafruit_FreeTouch says its only been tested on SAMD21 but maybe....

fresh pendant Oct 7, 2020, 8:22 PM

#

it seems that it doesn't work. I decide to use pushbuttons instead.

#

it's not critical, it just would have been nice

elder hare Oct 7, 2020, 9:36 PM

#

say i have a String !testMe something there is 8 character to the word something how can i fetch/get that workd after the space ?

leaden walrus Oct 7, 2020, 9:39 PM

#

@fresh pendant do you know how the hack works in CP? using a 1M resistor

fresh pendant Oct 7, 2020, 9:40 PM

#

Yeah I vaguely know about it. wanting a demo right now meant not trying to implement a software touch library right now 🙂

leaden walrus Oct 7, 2020, 9:46 PM

#

@elder hare strchr or strtok maybe?

elder hare Oct 7, 2020, 10:04 PM

#

@leaden walrus hmmm i tried this

Serial.println(payload_str.substring(6, 10));

and i wrote !neon blue

but it returns lf :S dunno where that's coming from :S

leaden walrus Oct 7, 2020, 10:05 PM

#

what is payload_str?

#

arduino String type?

elder hare Oct 7, 2020, 10:05 PM

#

yea

#

lol i wrote !neon green and now i get calf

#

xD

#

hmmm

#

maybe there is something more in the string :S

leaden walrus Oct 7, 2020, 10:07 PM

#

maybe. what platform are you building on?

elder hare Oct 7, 2020, 10:09 PM

#

oh yes!! there is ALOT more in the string xD

leaden walrus Oct 7, 2020, 10:09 PM

#

that'd explain it 🙂

elder hare Oct 7, 2020, 10:09 PM

#

yupp 😛

leaden walrus Oct 7, 2020, 10:10 PM

#

ignore my suggestions above. those are lower level C funcs.

#

the arduino string lib should make it easier

frosty thistle Oct 7, 2020, 10:54 PM

#

I got the MAX7221's in and they work. Had to shift the TFT to software SPI, but thats fine in this application. Thanks again!

neon cobalt Oct 8, 2020, 5:25 AM

#

what are arduino nano's used for specificaly

woven mica Oct 8, 2020, 7:13 AM

#

For controlling electronics

low gorge Oct 8, 2020, 8:21 AM

#

Hey guys i need a little help

#

i want to let my led's blink based on the potentiometer, and when the potentiometer is all the way to the left i want it to be the slowest and all the way to the right as its fastest but it does the opposite. could anyone help
?

#

const int LED1 = 9;
const int LED2 = 3;
const int analogPin = A0;
double interval = 0;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode (LED1, OUTPUT);
pinMode (LED2, OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
interval = (analogRead(analogPin) / 2 );
if (interval == 0)
{
digitalWrite(LED1 , LOW);
digitalWrite(LED2 , LOW);
}
else
{
digitalWrite(LED1 , HIGH);
digitalWrite(LED2 , HIGH);
delay(10);
digitalWrite(LED1 , LOW);
digitalWrite(LED2 , LOW);
delay(interval);
Serial.print("interval: ");
Serial.print(interval);
Serial.println(" ms");
}
}

#

that's my code

sinful estuary Oct 8, 2020, 8:23 AM

#

One thing you might want to add is pinMode(analogPin, INPUT); in void setup()

low gorge Oct 8, 2020, 8:24 AM

#

alright imma do that give me a second

#

added it

#

have you got any idea how i could solve it?

#

i've tried many things already like switching the HIGH, LOW and changing the delay

sinful estuary Oct 8, 2020, 8:28 AM

#

Really sorry, I do not know why the direction would be switched, based on the code, as it seems sound. Perhaps you could check the potentiometer wiring?

low gorge Oct 8, 2020, 8:29 AM

#

i'll have a quick look i believe it is where it supposed to be tho

#

well i switched the wiring, and now it works however i believe that the left side of the potentiometer is not supposed to be connected to ground am I right?

#

i mean the 5V output

#

and the right side of the potentiometer is connected to ground

#

noe

#

now*

sinful estuary Oct 8, 2020, 8:35 AM

#

Hmm, I wasn't aware of any limitation on which side of the potentiometer can be connected to 5V and ground, is there any such thing? Sorry mate, unsure with this.

#

Hello, I am having some issues with interfacing a TEA5767 and the 7 segment HT16K33 backpack over I2C. Have connected the data pins and clock pins accordingly, and the addresses do not clash (0x70 for HT16K33, 0xC0(w) & 0xC1(r) for the Radio).

When only one of the two is connected, the connected item functions as expected. However, when I connect the radio and display to the uC (Arduino Pro Mini), neither of them work. Could someone please help me out?
(Everything is receiving regulated 5V)

#include <Adafruit_GFX.h>
#include <Adafruit_LEDBackpack.h>
#include <Wire.h>
#include <TEA5767N.h>

Adafruit_7segment matrix = Adafruit_7segment();
TEA5767N radio = TEA5767N();
double frequency = 87.50;

void setup()
{ 
  Wire.begin();
  radio.selectFrequency(frequency); // pick your own frequency
  matrixSetup(); //own method
  freqPrint(frequency);  //own method
}
void loop() {}
void freqPrint(double inFreq)
{
   inFreq = inFreq * 10;
   a = (int)inFreq;
   matrix.writeDigitNum(4, a%10, false); 
   a = a/10;
   matrix.writeDigitNum(3, a%10, true);
   a = a/10;
   matrix.writeDigitNum(1, a%10, false);
   a = a/10;
   if(a == 0)
    matrix.writeDisplay();
   else
   {
    matrix.writeDigitNum(0, a%10, false);
    a = a/10;
    matrix.writeDisplay();
   }
}

void matrixSetup()
{
  matrix.begin(0x70);
  matrix.setBrightness(1);
  matrix.writeDisplay();
}

low gorge Oct 8, 2020, 9:06 AM

#

Hmm, I wasn't aware of any limitation on which side of the potentiometer can be connected to 5V and ground, is there any such thing? Sorry mate, unsure with this.
@sinful estuary I asked my teacher so there isn't such thing so problem is solved now thanks bro!

elder hare Oct 8, 2020, 10:08 AM

#

namespace outer {
inline namespace inner {
  void foo();
}  // namespace inner
}  // namespace outer

gives

this declaration has no storage class or type specifier

pine bramble Oct 8, 2020, 12:16 PM

#

@elder hare
Post #5 here:
https://forum.arduino.cc/index.php?topic=37232.0
from TRON007, Sep 13, 2009, 10:28 am

elder hare Oct 8, 2020, 12:17 PM

#

@pine bramble ty but i got it to work 🙂

#

made a settings.h and settings.cpp and got it working 🙂

low gorge Oct 8, 2020, 12:49 PM

#

could anyone review my simon says script?

#

it keeps repeating itself while there was no button clicked

north stream Oct 8, 2020, 1:05 PM

#

Possibly?

low gorge Oct 8, 2020, 1:10 PM

#

it's a little long is it a problem when i paste it here/

#

?*

#

https://pastebin.com/raw/b3KFxmEr

#

don't mind the names of integers, it's in dutch

obtuse spruce Oct 8, 2020, 1:31 PM

#

@low gorge it doesn't work because you don't wait for the user to press the buttons.

low gorge Oct 8, 2020, 1:31 PM

#

oh

obtuse spruce Oct 8, 2020, 1:32 PM

#

Also you can't test for them like that.... You must see if there user is pressing any of the three.. and you must wait for the button to be released before checking it again

low gorge Oct 8, 2020, 1:32 PM

#

how can i do that? any suggestions

#

i'm really frustrated by the fact that i just can't get it to work

obtuse spruce Oct 8, 2020, 1:34 PM

#

Think about just this but if code:

  teller = 0;
  while ( level >= teller )
  {
    if (digitalRead(knopgeel) == HIGH)
    {
      antwoord[teller] = 2;
      delay(500);
      teller++;
    }

#

If it was level 5 and I held down the green button... You'd fill upantwoord all with green even though it was just one press

low gorge Oct 8, 2020, 1:36 PM

#

yeah that's not supposed to happen

obtuse spruce Oct 8, 2020, 1:37 PM

#

You need to wait for the line toLOW before looking for the next button press

low gorge Oct 8, 2020, 1:38 PM

#

uhmm

#

imma try and get that

obtuse spruce Oct 8, 2020, 1:39 PM

#

My first suggestion: ignore the game problem for now and just focus on writing a single function the waits for the user to press one of the three buttons, then waits for that button press the finish, and returns the number of the button.

#

Call that function from loop and flash the corresponding light when you get it

ornate horizon Oct 8, 2020, 2:13 PM

#

Hey everyone! Can someone tell me if this is a programmable board or is it a shield/module to be added to a separate board?

#

https://www.ebay.com.au/itm/ESP-WROOM-32-ESP32-ESP32S-2-4GHz-WiFi-Bluetooth-Development-Board-for-Arduino-A/274359491674

eBay

ESP-WROOM-32 ESP32 ESP32S 2.4GHz WiFi Bluetooth Development Board f...

The entire solution takes up the least amount of printed circuit board area. Due to the light and screen difference, the item's color may be slightly different from the pictures. Supporting three modes: AP, STA, and AP+STA.

#

I can see it says development board, but I haven't worked out what that means :/

obtuse spruce Oct 8, 2020, 2:46 PM

#

ESP32 is a programmable MCU - but without clear development support from the supplier - why would go that route? If you're buying just one or two to develop a project with - spend more and get a board from a supplier that has full documentation on line, and clearly has done the work to have it supported and functioning in one or more development contexts.

vivid rock Oct 8, 2020, 8:46 PM

#

@ornate horizon it is certainly a programmable board

rose yarrow Oct 9, 2020, 12:30 AM

#

I have a Bluefruit LE uart friend that I am wanting to use with my phone. I can’t get it to communicate with the digital pins I want it to.

#

It always comes up with this message too

📎 image0.png

rugged mirage Oct 9, 2020, 4:47 AM

#

So if I have a timer match interrupt setup on my arduino but it doesn’t seem exact enough. Do I need to account for the time it takes for those instructions to run?

#

The interrupt itself only runs one command. It increments a value every 54000 steps at a 256 prescaled 16mhz clock. Can I chock up the inconsistency to a cheaper oscillator in the cheap Chinese arduinos I test on?

cedar mountain Oct 9, 2020, 5:06 AM

#

Can you quantify the inconsistency you're seeing?

sinful estuary Oct 9, 2020, 5:31 AM

#

Hello, I am having some issues with interfacing a TEA5767 and the 7 segment HT16K33 backpack over I2C. Have connected the data pins and clock pins accordingly, and the addresses do not clash (0x70 for HT16K33, 0xC0(w) & 0xC1(r) for the Radio).

When only one of the two is connected, the connected item functions as expected. However, when I connect the radio and display to the uC (Arduino Pro Mini), neither of them work. Could someone please help me out?
(Everything is receiving regulated 5V)

 #include <Adafruit_GFX.h>
 #include <Adafruit_LEDBackpack.h>
 #include <Wire.h>
 #include <TEA5767N.h>
 
 Adafruit_7segment matrix = Adafruit_7segment();
 TEA5767N radio = TEA5767N();
 double frequency = 87.50;
 
 void setup()
 { 
   Wire.begin();
   radio.selectFrequency(frequency); // pick your own frequency
   matrixSetup(); //own method
   freqPrint(frequency);  //own method
 }
 void loop() {}
 void freqPrint(double inFreq)
 {
    inFreq = inFreq * 10;
    a = (int)inFreq;
    matrix.writeDigitNum(4, a%10, false); 
    a = a/10;
    matrix.writeDigitNum(3, a%10, true);
    a = a/10;
    matrix.writeDigitNum(1, a%10, false);
    a = a/10;
    if(a == 0)
     matrix.writeDisplay();
    else
    {
     matrix.writeDigitNum(0, a%10, false);
     a = a/10;
     matrix.writeDisplay();
    }
 }
 
 void matrixSetup()
 {
   matrix.begin(0x70);
   matrix.setBrightness(1);
   matrix.writeDisplay();
 }

rugged mirage Oct 9, 2020, 6:15 AM

#

It takes a while to get to a point where I can actually see the inconsistency. I’m building a decimal clock. The 54000 counts at 256 prescaled 16mhz works out to exactly .864 seconds. So every interrupt I increment my variable for seconds. After 100 seconds I increment the value for minutes, after 100 minutes I increment the hour variable and after 10 hours I reset hours to zero. Looks like I lose about a minute everyday

cedar mountain Oct 9, 2020, 6:18 AM

#

That's about 700ppm of error, so it's indeed larger than I would expect for a frequency mismatch, if you're using a crystal. If you're using an internal RC oscillator, it would be totally normal.

pine bramble Oct 9, 2020, 10:10 AM

#

i made a wrong code. i need to reset this arduino
but if i connect the arduino in my computer, the mouse and keyboard move
so i can't upload right code if you know how to reset? help me 😄

#

pls help

#

it is Leonardo board

lone ferry Oct 9, 2020, 12:37 PM

#

@pine bramble Hold down the reset button on the Arduino the whole time, then release it after you press the Upload button.

rugged mirage Oct 9, 2020, 1:35 PM

#

Pretty sure it’s a crystal. I didn’t fab the board though so I guess I don’t know for sure. Any good way to check? It’s really small and surface mount. Using an arduino nano

#

I guess the way to tell is how many leads come off of it? Looks like 6

#

With some googling looks like it’s a ceramic resonator. So I guess I go on with my design because I plan to solder my own chip into a circuit and I already plan on using a crystal

north stream Oct 9, 2020, 1:40 PM

#

Could check the configuration fuses to see what kind of oscillator is selected. However, it could be configured for "external" and a (cheaper) resonator used instead of a crystal.

#

@sinful estuary You can change the address of the HT16K33

normal bough Oct 9, 2020, 3:45 PM

#

hey can anyone help me with an issue I am having with the library for Adafruit's MLX90393 breakout board?

cedar mountain Oct 9, 2020, 3:56 PM

#

The rule of thumb is to just ask the question you want to ask, rather than looking for a volunteer to answer it before they know what it is.

normal bough Oct 9, 2020, 4:03 PM

#

Oh, that sounds fair! I need to be able to set the digital filter, oversampling rate, and resolution (parameters of the MLX90393) but the library doesn't have functions for these built in. I'm sure they can be hardcoded, but I have no idea how to do this.

torpid hill Oct 9, 2020, 4:06 PM

#

This isn't exactly an arduino question

#

But I suppose this is the closest I'll get to an AVR channel

#

I'm attempting to have the first 3 ports of PORTB on my atmega act like a counter up to 7

#

So, I set the prescaler to 1024, the mode to CTC, and the output compare register to 7. Then, in the main loop, I'm always setting PORTB's value to TCNT for the timer

#

But it's not acting as expected, all the LEDs on the pins just remain lit

leaden walrus Oct 9, 2020, 4:09 PM

#

@normal bough doesn't really answer your question, but there is an open issue for that:
https://github.com/adafruit/Adafruit_MLX90393_Library/issues/3

#

oh wait....looks like you've commented there 🙂

#

if no one else PR's a solution, i'll get to it eventually. unfortunately not highest on prior list though. 😦

cedar mountain Oct 9, 2020, 4:15 PM

#

@torpid hill It's possible that the LEDs are just blinking too fast to see. With a prescaler of 1024, they'll be changing at several thousand times per second.

normal bough Oct 9, 2020, 4:16 PM

#

Cater, is it possible that you could find someone to help me? Or how long is eventually?

leaden walrus Oct 9, 2020, 4:17 PM

#

not sure when. looks like you found another library, linked in issue thread. did that one not end up working?

normal bough Oct 9, 2020, 4:19 PM

#

Nope, I'm running into a different, but in the end, similar issue with that library. Adafruit's library doesn't have the functionality I need but it works. The other library has the functionality, but it has a bug, where when I run it with Adafruit's TCA multiplexor it bugs out and can't read from the magnetometers. I know my wiring and things are good because that set up works great with the Adafruit library I just can't set the parameters I need to.

#

is it possible that someone could look at the other library (Ted Yapo's) and take his functions for setting these parameters and nicely insert them into the Adafruit library? I don't know how this works but it seems like that could make it an easy job right?

torpid hill Oct 9, 2020, 4:20 PM

#

@cedar mountain Wait...you’re right, NOOOOOOOOOOOOOOOOOOO

normal bough Oct 9, 2020, 4:20 PM

#

@torpid hill I've been there so many times 😆

leaden walrus Oct 9, 2020, 4:21 PM

#

it'd be a good ref. but not a simple matter of copy/pasta.

#

and would need to get a board setup for testing, etc.

#

it just comes down to some basic register read/writes

#

so not super difficult code wise.

normal bough Oct 9, 2020, 4:23 PM

#

I have been trying to figure this out (here and there) for months, so I would jump at the chance to send someone the hardware I'm working with if they would be willing to help

leaden walrus Oct 9, 2020, 4:23 PM

#

oh...and now remembering another detail....this issue should probably get taken care of first:
https://github.com/adafruit/Adafruit_MLX90393_Library/issues/6

torpid hill Oct 9, 2020, 4:24 PM

#

How can I lower the resolution even more @cedar mountain

leaden walrus Oct 9, 2020, 4:24 PM

#

that changes the general way the underlying reads/writes are happening

cedar mountain Oct 9, 2020, 4:25 PM

#

@torpid hill The simplest thing to do would be to count to a much higher value but use 3 higher bits of the counter resister to control the LEDs, just doing a bit-shift before writing to the port.

torpid hill Oct 9, 2020, 4:25 PM

#

Like, the least significant bits of it?

normal bough Oct 9, 2020, 4:26 PM

#

@leaden walrus is it possible to elevate this up your priority list if I can make it more "worth your while?"

leaden walrus Oct 9, 2020, 4:27 PM

#

ha. we'll see. i think just bringing it up here is enough motivation.

cedar mountain Oct 9, 2020, 4:27 PM

#

I assumed you were using the least significant bits (0, 1, 2) already, but would want to change to use higher ones that would change slower. Like count to 255 and use bits 5, 6, 7.

normal bough Oct 9, 2020, 4:27 PM

#

I think I saw your name somewhere on the Adafruit website, do you work for them? Or just help out a lot?

torpid hill Oct 9, 2020, 4:27 PM

#

Oh, wait, wait

#

Am I switching it around?

#

Bits 5-7 would be the most significant then?

#

Yeah, I mixed them up

#

📎 video0.mov

#

Yep, you're definitely right, Ed

#

You can tell from how they're fading

normal bough Oct 9, 2020, 4:41 PM

#

@leaden walrus how will I know if/when you have worked on the library? I suppose I'll need to keep my eyes on the Github repo for it?

torpid hill Oct 9, 2020, 4:53 PM

#

The Atmel ICE is such an awesome tool

#

You can debug the chip live, and even run programs without flashing them

leaden walrus Oct 9, 2020, 4:56 PM

#

@normal bough yep. keep an eye on the repo.

normal bough Oct 9, 2020, 4:58 PM

#

@leaden walrus you are life (research project) saver!

pine bramble Oct 9, 2020, 5:45 PM

#

hello there

#

ive just recived my arduino leonardo aswell as my I2C LCD display

#

how can i make it work

#

i only get a blue screen

#

this is my current code``` #include <LiquidCrystal_I2C.h>

#include <Wire.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{

lcd.begin();

lcd.backlight();
lcd.print("Hello, World");
lcd.setCursor(0,1);
lcd.print("!");
delay(10000);
lcd.noBacklight();
}

void loop()
{

}```

#

and the L2C lib is added aswell

obtuse spruce Oct 9, 2020, 5:58 PM

#

Call lcd.init() before you call lcd.begin()

pine bramble Oct 9, 2020, 6:00 PM

#

class liquid crystal_L2C has no member named init

#

@obtuse spruce

#

on what ports need to be what connected

obtuse spruce Oct 9, 2020, 6:04 PM

#

Huh... It's in the header file: https://github.com/johnrickman/LiquidCrystal_I2C/blob/master/LiquidCrystal_I2C.h

#

Look at the example sketches that come with the library

#

That's where I saw the use of init

pine bramble Oct 9, 2020, 6:05 PM

#

now ive copied the raw no there is no begin

#

if i try to get the board info it just says that i need to upload a sketch but ive uploader it 100000 times

vivid rock Oct 9, 2020, 6:18 PM

#

Just found TinyUSB library which solves the problem that was bugging me for a while: how to make an SD card or flash storage chip show as a mass storage device on a computer when the board is connected by a USB cable - while at the same time having an Arduino sketch running. Makes me real happy.
My thanks to primary developer Ha Thach and to Adafruit for sponsoring this work.

pine bramble Oct 9, 2020, 10:12 PM

#

Report STM32F405 Express in Arduino IDE

I just got mostly through the installation and validation process to build .ino files for STM32F405 Express.

The new Arduino IDE I installed yesterday did find my local copy of the cube programmer. It may've actually worked; I didn't test the uploaded firmware - instead, I uploaded it again, using my .. ahem .. custom way I'd used all along.

(I think this copy of dfu-util comes from Debian).

But it looks like the hooks in the Arduino IDE (stm32duino) are working, for use with the Cube programmer.

#

The manual method I've used all along (or one of them; it's been a while):

 $ dfu-util -a 0 --dfuse-address 0x08000000 -D ./this.bin

unkempt lagoon Oct 9, 2020, 11:36 PM

#

Not sure if this is the right channel to ask this, but

#

https://imgur.com/a/rQDIHQm#k9cMTYd

Imgur

#

How can I use this old Samsung GT-B3210 display on an Arduino?

pine bramble Oct 10, 2020, 12:32 AM

#

Basically you'd build a peripheral with its own memory, and send it data.

#

As an example, you could send ASCII to a Raspberry Pi, which renders it in an xterm in a specific font, size and color, via its HDMI port.

#

Some microcontrollers have multi-pin interfaces that might support some kind of a display, directly, I think.

#

http://adafru.it/1590

#

The 'Arduino-ness' of such a setup is the SPI interface, shown in the above device's pinout, here:

https://learn.adafruit.com/ra8875-touch-display-driver-board/pinouts#spi-logic-pins-3019682-5

#

So generally, you find a driver chip like the above, then shop for a display that works with it.

#

Then write a library for it. ;)

unkempt lagoon Oct 10, 2020, 1:09 AM

#

So a lot of trouble to make it work then

#

That's out of my league, but thanks for the answer

woven wedge Oct 10, 2020, 4:26 AM

#

I'm using an arduino micro in place of a teensy. I was provided a script which uses key modifiers like "KEY_UP", "KEY_DOWN", etc. However it looks like a library specific to teensyduino. I've tried searching for where these are defined in teensyduino but "KEY_UP" as an example didn't return anything. I'm using just plain Arduino IDE 1.8.10 on Linux

wraith current Oct 10, 2020, 4:34 AM

#

@woven wedge how are you reading the keyboard ?

#

It's probably in the board definition somewhere but this might help https://www.pjrc.com/teensy/td_keyboard.html

woven wedge Oct 10, 2020, 4:40 AM

#

A python script

#

I searched up that table and got https://www.appgamekit.com/documentation/guides/scancodes.htm I'll try it out

#

Actually this one's different

kind flare Oct 10, 2020, 4:45 AM

#

Error for setting up feather sense "Target not in DFU mode". ANY HELP with this???

woven wedge Oct 10, 2020, 4:49 AM

#

Discussion on my library issue: https://forum.pjrc.com/threads/56808-Keyboard-HID-codes-not-working

Keyboard HID codes not working

Morning all,

This is a question tied to the same project I posted earlier here:
https://forum.pjrc.com/threads/56715-Simultaneous-USB-Host-and-Device-mode

and just so you know I have done research on this topic before asking for help, here's a post that asked a question...

wraith current Oct 10, 2020, 7:05 AM

#

@kind flare Arduino ? have you tried bootloader update ? https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide/updating-the-bootloader

Adafruit Learning System

Bluefruit nRF52 Feather Learning Guide

Get started now with our most powerful Bluefruit board yet!

kind flare Oct 10, 2020, 7:29 AM

#

@wraith current yes I’ve burned the bootloader but the green light on the feather goes on and I get the same error message.

sinful estuary Oct 10, 2020, 9:31 AM

#

You can change the address of the HT16K33
Ohhh how do I do that? I was unable to find it in the learn.adafruit.com page for the thing

pine bramble Oct 10, 2020, 10:44 AM

#

@pine bramble Hold down the reset button on the Arduino the whole time, then release it after you press the Upload button.
@lone ferry wow it works! thx*10000!!!!!

lone ferry Oct 10, 2020, 10:48 AM

#

You're not the first person to run into this problem, haha.

abstract night Oct 10, 2020, 11:47 AM

#

Hey guys I've got a Circuit Playground Bluefruit and am trying out some real basic Arduino coding for my class, I'm trying to use the two buttons as keyboard inputs however errors are called every time saying HID.h cannot be found

#

The code works, its directly from my tutors. It just seems to be that my Bluefruit chip isn't behaving like the regular Circuit Playgrounds. Is there something extra I need for these basic arduino libraries to work?

#

All the online help I've found only talk about circuitpython, but we aren't using that for the course

pine bramble Oct 10, 2020, 11:53 AM

#

@woven wedge I use ag which is called the silver searcher.

#

I think it's found on github; Debian may've had a prebuilt copy.

#

Then just

 $ ag KEY_UP

#

works a lot like a recursive grep.

#

Don't know windows terminology for that; Mac OS probably has grep or egrep.

#

@abstract night The method used to read the pushbuttons may be different.

#

HID.h implies HID which is a USB thing ("Human Interface Device" or somesuch).

#

That's a more advanced means of generating keystrokes or mouse swipes. Arduino generates these but does not read from them.

#

Either the Adafruit guide for the target board (the thing you're programming) or the instructor's instructions (haha) contain the name of a missing library, would be my guess here.

#

Also, post the entire error message block from the Arduino IDE, to a pastebin type of website, and link that here. All of it.

Control A followed by Control C may copy all that text. It's in the lower half of the IDE window.

abstract night Oct 10, 2020, 12:06 PM

#

Here's the error message

#

Arduino: 1.8.13 (Windows 10), Board: "Adafruit Circuit Playground Bluefruit, 0.3.2 SoftDevice s140 6.1.1, Level 0 (Release)"

In file included from C:\Users\Jadyn\Desktop\Deco2300\Arduino\Hello_Keyboard\Hello_Keyboard.ino:1:

C:\Program Files (x86)\Arduino\libraries\Keyboard\src/Keyboard.h:25:10: fatal error: HID.h: No such file or directory

25 | #include "HID.h"

  |          ^~~~~~~

compilation terminated.

exit status 1

Error compiling for board Adafruit Circuit Playground Bluefruit.

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

pine bramble Oct 10, 2020, 12:09 PM

#

Right, turn on all Warnings.

#

There's a forward slash in that path. ;)

#

C:\Program Files (x86)\Arduino\libraries\Keyboard\src/Keyboard.h:25:10: fatal error: HID.h: No such file or directory

abstract night Oct 10, 2020, 12:10 PM

#

Sorry how do I turn on all warnings?

#

Yea I noticed that but its not anywhere in the sketch

pine bramble Oct 10, 2020, 12:11 PM

#

In the upper left side of the Arduino IDE there's menus.

#

Keyboard seems to be the library used.

abstract night Oct 10, 2020, 12:13 PM

#

📎 message.txt

#

Thats the full error message

#

Yea Keyboard.h is what Ive used as the include statement

#

I have no idea where the backwards slash is coming from...

pine bramble Oct 10, 2020, 12:15 PM

#

I'm looking at that now. Thanks, that's what's needed.

#

It helped me to understand the context, but it still looks like there's at least one library you don't have installed.

The hello keyboard .cpp file has #include type statements at the top of the file, maybe?

#

I'm afk for 15 minutes (8:19 EDT). EDIT: back. ;)

abstract night Oct 10, 2020, 12:35 PM

#

😄 So I got not idea where the .cpp files are coming from.. I can't find them anywhere

#

the .ino only has #include <Keyboard.h>

pine bramble Oct 10, 2020, 12:36 PM

#

Well in Linux, /home/myname/Arduino/libraries

#

that has the path for the libs. You install them and they reside there.

abstract night Oct 10, 2020, 12:38 PM

#

does C:\Program Files (x86)\Arduino\libraries seem right?

#

Bunch of folders that do look like libraries

pine bramble Oct 10, 2020, 12:38 PM

#

I don't know about the x86 part but the rest of it looks promising.

abstract night Oct 10, 2020, 12:38 PM

#

C:\Program Files (x86)\Arduino\libraries\Keyboard\src this contains the Keyboard.h file

pine bramble Oct 10, 2020, 12:39 PM

#

I haven't used Windows in many years so I'm not familiar with common tasks using it, such as locating a specific file on the disk, by it's name.

#

There may be an HID.h file in the same directory.

#

Either you already have the file and aren't referencing it, or you don't have the file, and need to install the library that holds it.

#

Maybe post the project's .ino file on pastebin type of web site as well.

#

Or you can upload it the way you did with message.txt

abstract night Oct 10, 2020, 12:41 PM

#

Yea alright, Its just a simple sample they gave us

#

📎 Hello_Keyboard.ino

#

This is whats in the library file

📎 unknown.png

pine bramble Oct 10, 2020, 12:43 PM

#

Yeah.

#

So Keyboard.cpp seems to point to HID.h I think.

#

You're calling Keyboard.h in that include at the top of hello..ino

#

Maybe it's the wrong Keyboard.h version.

abstract night Oct 10, 2020, 12:44 PM

#

Am I missing some HID library?

pine bramble Oct 10, 2020, 12:44 PM

#

Upload Keyboard.cpp here

abstract night Oct 10, 2020, 12:45 PM

#

📎 Keyboard.cpp

pine bramble Oct 10, 2020, 12:45 PM

#

thankx

#

edit your hello to say something like:

#undef _USING_HID

#

The leading underscore may be wrong.

#

Then exit the Arduino IDE, start it again, and try to compile.

#

If you actually need to use something from the HID stuff, you'll know it soon enough. ;)

abstract night Oct 10, 2020, 12:47 PM

#

Add that line anywhere?

pine bramble Oct 10, 2020, 12:48 PM

#

Before you #include the keyboard.h first undef that _USING_HID thing

#

So just above it.

#

That should tell the keyboard driver you aren't using HID.

#

(assuming you are not)

#

If this works for you, it still may not be the entirely satisfactory answer.

#

Really depends on the intent the instructor had. ;)

abstract night Oct 10, 2020, 12:51 PM

#

Still runs with the same error after restarting with the line added

pine bramble Oct 10, 2020, 12:51 PM

#

The word sketch in white at the bottom of the compilation is your clue that it compiled correctly.

#

Okay so ignore all I said about #undef then.

#

The file seems peppered with references to USB and HID. ;)

#

The good news: the file has Arduino LLC in the top.

#

2015 Peter Barrett.

#

So it's probably already installed somewhere.

#

Wild guess: try

#include <HID.h>

#

Try both positions (above, and below, the include for Keyboard.h)

#

Just so you know: your .ino file does NOT use HID at all, from what I can see.

#

OH. Just comment out the include for Keyboard.h

#

See what that brings.

#

Two forward slashes together (no space) starts a comment.

abstract night Oct 10, 2020, 12:56 PM

#

ok so the include HID couldnt find anything else

#

and commenting that out gives

#

'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?

pine bramble Oct 10, 2020, 12:57 PM

#

Oh wait a minute you can't do that either as it's got keyboard. (keyboard dot anything).

#

Sorry my bad.

abstract night Oct 10, 2020, 12:57 PM

#

no worries dude Im just hella confused about this

pine bramble Oct 10, 2020, 12:58 PM

#

Keyboard.begin();

#

we have to satisfy that one, so Keyboard.h is required for sure.

#

Maybe not the version you have, but some version.

#

That's too big an error to dismiss as an instructor's trick, or a typo.

#

In real programming, I make the kinds of mistakes I'm making here all the time, but I'm not pressed to explain them to another person, so they aren't avoided (no need to; I learn from mistakes).

#

The idea is to make your mistakes quickly. ;)

abstract night Oct 10, 2020, 1:00 PM

#

Yea I'm sure making a lot with this new tech this course threw at me 😅

#

so maybe update some libraries?

pine bramble Oct 10, 2020, 1:00 PM

#

OKAY.

#

You are making keyboard characters for HID with the program.

#

You are using the target as a surfeit keyboard to control something like a personal computer.

#

So the Adafruit examples will hold or at least be helpful.

#

We can probably find something on learn.adafruit.com.

#

Probably this, but I just found it in google just now:

#

https://learn.adafruit.com/ble-hid-keyboard-buttons-with-circuitpython
oops that's circuitpython. ;)

abstract night Oct 10, 2020, 1:03 PM

#

Yea all I could find was for circuitpython

#

is it still useful?

pine bramble Oct 10, 2020, 1:03 PM

#

This one looks more to the point:
https://learn.adafruit.com/mouse-and-keyboard-control-using-tinyusb-and-ble/understanding-arduino-mouse-keyboard-classes

#

Here is their link to the Arduino.cc site's writeup:
https://www.arduino.cc/reference/en/language/functions/usb/keyboard/

#

I'm still seeing Keyboard.h as the single point of entry.

#

and it *should* already be there.

#

So I'm confused as to why there's an error at all.

abstract night Oct 10, 2020, 1:07 PM

#

I just had a read through and it all makes sense. Still super confused why mine is throwing errors

#

Do you have any clue about that reversed / from the error?

pine bramble Oct 10, 2020, 1:08 PM

#

The more I look at it the more I rule out any instructor 'tricks' to 'gotcha' on purpose for a lesson.

#

Yeah that reversed slash seems wrong to me.

#

I don't know if it can be overlooked or if it's endemic.

#

Still it should have been taken care of long ago by someone who wrote this stuff.

#

There's a dim possibility that LINE ENDINGS are a factor.

#

Linux, Mac OS and Windows each use different line endings.

#

So when you press ENTER a short code is stored in that text file.

#

It's considered legal text, even though it is essentially a binary code.

#

That's how far down the rabbit hole we're going, here. ;)

#

Obviously 'reinstall the entire Arduino IDE' is the low hanging fruit, but that just seems extreme to me.

abstract night Oct 10, 2020, 1:10 PM

#

drowning in the depths on the intro lesson suuucks

#

so If i tell the IDE the board is just the Playground Circuit it compiles no errors, cant upload though

pine bramble Oct 10, 2020, 1:11 PM

#

My guesses are:
a) the necessary Keyboard.h was installed with the Arduino IDE
b) your instructor provided good and complete code, leaving
c) not sure just what's causing the error.

#

Yeah, so perhaps your choice of targets in the IDE is just plain wrong.

#

Is this an Adafruit board?

abstract night Oct 10, 2020, 1:12 PM

#

yea adafruit playground circuit bluefruit

pine bramble Oct 10, 2020, 1:13 PM

#

Do you have a product number for that? Like, 3333 is the CPX.

#

It's in the URL for the product's page.

#

The stuff I saw earlier indicated it was a recent NRF based board.

#

(NRF52 maybe)

abstract night Oct 10, 2020, 1:13 PM

#

4333

#

1 x nRF52840 Cortex M4 processor with Bluetooth Low Energy support

pine bramble Oct 10, 2020, 1:14 PM

#

-DARDUINO_NRF52840_CIRCUITPLAY -DARDUINO_ARCH_NRF52

abstract night Oct 10, 2020, 1:14 PM

#

from the description

pine bramble Oct 10, 2020, 1:14 PM

#

okay 4333 thanks

#

This is the Guide:
https://learn.adafruit.com/adafruit-circuit-playground-bluefruit

#

It'll probably have a Arduino IDE setup section.

abstract night Oct 10, 2020, 1:16 PM

#

yep Ive followed that extensively

pine bramble Oct 10, 2020, 1:16 PM

#

Reinstall this:

#

https://learn.adafruit.com/assets/39907

#

It's the BSP (board support package) for Adafruit NRF52

#

Its been around but they update all the time.

#

Select the correct variant as per this image (which is for another target in the same family):

#

https://learn.adafruit.com/assets/94506

#

Adafruit Circuit Playground Bluefruit

#

I'm just following this:

https://learn.adafruit.com/adafruit-circuit-playground-bluefruit/arduino-support-setup

abstract night Oct 10, 2020, 1:20 PM

#

so remove the package and just redownload the latest?

pine bramble Oct 10, 2020, 1:21 PM

#

Ignore the manual git stuff and the stuff about updating the bootloader.

#

Yes that's what I do. I remove it then install it.

#

It grabs the files off the internet and installs it for you.

#

Removing it first makes sure it does that without errors (ordinarily).

#

You can even downgrade it one level (or to any previous version) if you have trouble remembering what it is. ;)

#

Then upgrade to current.

#

That's kind of a bookmark as it were. ;)

#

This is a Hail Mary pass but sometimes it works.

abstract night Oct 10, 2020, 1:22 PM

#

Alright so reinstalled finally

#

reboot the IDE and pray?

pine bramble Oct 10, 2020, 1:23 PM

#

Always exit the Arduno IDE.

#

Never reboot the computer itself.

#

soft use of 'always' and 'never' as that'd be absurd. ;)

abstract night Oct 10, 2020, 1:24 PM

#

😁 ofc

pine bramble Oct 10, 2020, 1:24 PM

#

Exiting the Arduino IDE just makes things a lot more standard. When it's truly necessary is a matter of experience. Often it's not necessary.

#

Control R should recompile the sketch.

#

Faster than using the menus and does the exact same thing.

abstract night Oct 10, 2020, 1:25 PM

#

sweet

pine bramble Oct 10, 2020, 1:25 PM

#

You can resize the lower half of the window to see more error messages.

abstract night Oct 10, 2020, 1:25 PM

#

bad news though still same error

pine bramble Oct 10, 2020, 1:25 PM

#

Yeah it's a little weird.

#

I'm not sure what's going on but it's probably simple.

#

Try a new empty sketch.

#

See if it compiles cleanly. That will validate the BSP for this target board.

#

Don't upload it though.

abstract night Oct 10, 2020, 1:27 PM

#

Done compiling

#

there were some red lines but nothing fatal I think

pine bramble Oct 10, 2020, 1:27 PM

#

If that works, just

#include <Keyboard.h>

at the top of the otherwise empty sketch.

Empty here means

void setup() {
}

void loop () {
}

#

The red lines are expected. ;)

abstract night Oct 10, 2020, 1:28 PM

#

ok sweet

pine bramble Oct 10, 2020, 1:28 PM

#

Yeah it takes a while to figure out the red lines; they are warnings.

abstract night Oct 10, 2020, 1:29 PM

#

📎 message.txt

#

seems like the same issue

pine bramble Oct 10, 2020, 1:30 PM

#

Yup.

#

So at least two of us are confused. That's good.

abstract night Oct 10, 2020, 1:30 PM

#

the path "Keyboard\src/Keyboard.h" is still whats standing out to me

pine bramble Oct 10, 2020, 1:30 PM

#

Try rolling BACK the NRF 52 from Adafruit.

#

This could be a typo that got approved for release.

abstract night Oct 10, 2020, 1:31 PM

#

alright

#

haha weird

pine bramble Oct 10, 2020, 1:31 PM

#

happens.

#

That board's been on the market for more than 6 months iirc.

#

So there should be an earlier version that still has it supported.

#

The NRF52 board support goes way back, to earliest boards from Adafruit with that chip family.

abstract night Oct 10, 2020, 1:33 PM

#

guess Ill just go back one at a time then and hope it eventually works

#

shame its one of the lengthiest installs...

pine bramble Oct 10, 2020, 1:34 PM

#

0.20.5 and 0.20.1 are recent.

0.21.0 is the latest.

#

There's also the dim possibility that you also need, in addition to Adafruit NRF52 support .. Arduino NRF52 support.

#

Sometimes they leverage the Arduino version as well.

#

This happens with SAMD support for example.

abstract night Oct 10, 2020, 1:35 PM

#

hmmm ill have a look

pine bramble Oct 10, 2020, 1:35 PM

#

Usually, in the very latest Arduino IDE, it'll ask for dependencies for libraries, but I don't know about BSP's.

#

The bright side: this is a watered-down form of regular C and C++ programming skills. 'solving dependencies and missing libraries' is something every working C or C++ programmer faces.

#

It's good for you .. like cod liver oil. ;)

abstract night Oct 10, 2020, 1:37 PM

#

a great lesson then 😩

pine bramble Oct 10, 2020, 1:38 PM

#

Well it's a fact-of-life kind of thing. An obstacle most cannot avoid, and still get what they're after.

#

The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man.
-- George Bernard Shaw

me: that's very he/him of him. ;)

abstract night Oct 10, 2020, 1:41 PM

#

haha I like that quote

pine bramble Oct 10, 2020, 1:42 PM

#

Yeah I've spent a life trying to decide what it means in my case. I think anyone observing me would say 'that is a person who tries to adapt the world to himself' rather than the other way.

#

So like it or not I'm in the second category. Unreasonable. ;)

#

I think it's a choose-your-battles thing.

abstract night Oct 10, 2020, 1:49 PM

#

I would love to just adapt myself out of this situation... I've gone back to 0.15 with no luck

#

should I keep trying?

#

This is the worst way to start a procrastinated project 😭

pine bramble Oct 10, 2020, 1:50 PM

#

lol

#

I would drink two glasses of water.

#

I just had the one and probably need another.

#

The insights seem to be in the tap water. ;)

abstract night Oct 10, 2020, 1:52 PM

#

Haha yea I definitely need some brain lube

pine bramble Oct 10, 2020, 1:52 PM

#

You can try it on a second computer. You can get a friend to do it on their computer.

#

when rational approaches fail, sometimes magical thinking causes physical processes to occur (by your own actions).

abstract night Oct 10, 2020, 1:54 PM

#

hmm I can install it all on my laptop, dont wanna have to move my entire project over there though if it works

#

I guess If it works over there I should reinstall everything arduino here?

#

oh god thats so many drivers...

pine bramble Oct 10, 2020, 1:57 PM

#

I'm the friend. Doesn't compile here, either.

abstract night Oct 10, 2020, 1:57 PM

#

Oh

pine bramble Oct 10, 2020, 1:57 PM

#

Just by including Keyboard.h

abstract night Oct 10, 2020, 1:57 PM

#

interesting...

pine bramble Oct 10, 2020, 1:57 PM

#

so it's borked.

abstract night Oct 10, 2020, 1:58 PM

#

seems so simple...

#

whats possibly wrong with it then?

pine bramble Oct 10, 2020, 2:00 PM

#

okay so the Keyboard.h uses quotes:

#

that's wrong, probably.

#

That would usually mean that same directory has HID.h in it. I think.

#

Let me see how many hits for HID.h there are in that tree.

#

zero. ;)

abstract night Oct 10, 2020, 2:01 PM

#

Thanks man 🙂 means a lot youre helping out so much

pine bramble Oct 10, 2020, 2:01 PM

#

I know it. You're welcome.

#

If I wasn't enjoying it I'd just make an excuse and leave. ;) lol

abstract night Oct 10, 2020, 2:02 PM

#

haha true true

#

so should I change the Keyboard.h quotes to <>?

pine bramble Oct 10, 2020, 2:02 PM

#

./hardware/arduino/avr/libraries/HID/src/HID.cpp
./hardware/arduino/avr/libraries/HID/src/HID.h

#

You could try making a copy in your local directory and editing it there.

#

Use the quotes to include it instead of the factory version. See if that works.

abstract night Oct 10, 2020, 2:05 PM

#

ah shame it wont let me override

pine bramble Oct 10, 2020, 2:05 PM

#

No it just doesn't exist. Tried it.

#

So that's an AVR lib, I think. Or an installed lib you and I do not yet have.

#

Or a mistake in the IDE distribution (unlikely).

#

Sometimes you go to github.com and look for an 'issue' filed against a library.

#

This is messed up, I think.

abstract night Oct 10, 2020, 2:08 PM

#

oh ok

pine bramble Oct 10, 2020, 2:08 PM

#

Let's assume you need a library that has the HID name in it.

abstract night Oct 10, 2020, 2:08 PM

#

so uh

#

yea

#

wouldve thought that'd be pretty standard though

pine bramble Oct 10, 2020, 2:09 PM

#

There's HID Buttons by David Madison for example.

abstract night Oct 10, 2020, 2:10 PM

#

yea Ive got that and HID-project

pine bramble Oct 10, 2020, 2:10 PM

#

Really though somewhere on Adafruit's 'learn' server they should say exactly what's needed.

abstract night Oct 10, 2020, 2:11 PM

#

all three of them throw the same error

#

not finding the damned HID.h

pine bramble Oct 10, 2020, 2:11 PM

#

I might have it.

#

this:
https://github.com/cyborg5/BLE52_Mouse_and_Keyboard

#

from this:
https://learn.adafruit.com/mouse-and-keyboard-control-using-tinyusb-and-ble/installing-the-libraries

#

TinyUSB is definitely up-and-coming; wasn't used as much just a year ago or two years ago.

abstract night Oct 10, 2020, 2:15 PM

#

what is tinyusb even?

pine bramble Oct 10, 2020, 2:15 PM

#

~/Arduino/libraries$ ls -1 | cat
Adafruit_NeoPixel
Adafruit_SPIFlash
BLE52_Mouse_and_Keyboard
readme.txt
SdFat_-_Adafruit_Fork

#

Standard USB is different; tinyUSB is a new thing. ;)

#

Adafruit has migrated onto tinyUSB I think.

#

Presumably, it's tiny.

#

That didn't work - the BLE52_Mouse_and_Keyboard presumably needs its own reference, so the standard Keyboard.h won't work there.

#

trying

#

BLE52_Mouse_and_Keyboard.h
instead

abstract night Oct 10, 2020, 2:19 PM

#

I included the BLE without Keyboard.h and although it took a long time to compile it finished

#

I think?

#

a few red lines but if thats ok I guess i can try uploading it?

pine bramble Oct 10, 2020, 2:20 PM

#

No I got an error here. But if you saw sketch and a file size in white, it's probably good for an upload.

abstract night Oct 10, 2020, 2:21 PM

#

Sketch uses 82676 bytes (10%) of program storage space

#

better not fry my chip 😅

pine bramble Oct 10, 2020, 2:21 PM

#

Um haha yeah it could.

#

The way it fries it (not really frying) is makes it difficult to upload to a second time.

#

Usually a single or double-press of the RESET button addresses that.

#

Apparently in Linux I need adafruit-nrfutil present for something (saw a dfu ref).

abstract night Oct 10, 2020, 2:24 PM

#

didnt fry it but it isnt giving me the A and D output im after

#

should I get that or just try debugging from here?

pine bramble Oct 10, 2020, 2:24 PM

#

Yeah, but it does compile and upload.

#

You can use Serial.println("hello there"); type debugs and look in SerialMonitor, if that's supported.

#

I got a phone call (there's my excuse). ;)

abstract night Oct 10, 2020, 2:25 PM

#

Haha alright thanks man have a good one 🙂

pine bramble Oct 10, 2020, 2:26 PM

#

Keep at it. stick-to-itivity is helpful in electronics!

#

and I'm back quiet.

pine bramble Oct 10, 2020, 5:02 PM

#

@abstract night

https://github.com/cyborg5/TinyUSB_Mouse_and_Keyboard

Your program, modified:

https://termbin.com/yuxqj

#

If you're on linux, you can just create a fake binary (an executable script) that is named

adafruit-nrfutil

which is somewhere in your $PATH .. that will allow the compile to continue, if you don't have this already.

#

Seems to pack up the results of the compile for uploading to the target board:

#

adafruit-nrfutil dfu genpkg --dev-type 0x0052 --sd-req 0x00B6 --application /tmp/arduino_build_123456/this.ino.hex /tmp/arduino_build_123456/this.ino.zip

merry bramble Oct 10, 2020, 7:52 PM

#

Hello everyone, I'm not sure if this is the correct server to ask for help, but I have an ESP32 that I'm trying to program using Arduino IDE and I can't seem to get it to work.
I keep getting error messages saying "could not open port 'COM3'". I also cannot change the port number in the software.
I tried installing CP210x USB to UART driver, trying different PC ports but I'm running out of ideas

pine bramble Oct 10, 2020, 7:55 PM

#

Yeah.

#

CP2104 is a great chip. I use it all the time.

#

There's means to troubleshoot to find the device.

#

Basically you open something like the old Device Manager in Windows, and plug in the device, and see what pops up.

merry bramble Oct 10, 2020, 7:57 PM

#

I didn't really see the device in my device manager but I could try this method also.

#

Yeah, there's no changes in the device manager when I plug/unplug it from my PC.

#

The only thing that comes to my mind is trying a different cable which I do not have.

pine bramble Oct 10, 2020, 8:02 PM

#

Well CP210x is dead generic at this point, so I'd expect Windows to already have the driver installed.

#

Oh yeah some cables are junk.

#

You may find a way to borrow one for an hour.

merry bramble Oct 10, 2020, 8:02 PM

#

I do use that cable to recharge my headphones, though, so I don't think there's anything wrong with the cable.

pine bramble Oct 10, 2020, 8:02 PM

#

When I was in hospital a nurse just gave me hers.

#

There are cables that are only good for power, but not for communication.

merry bramble Oct 10, 2020, 8:03 PM

#

Good point, I might have to buy a new one on Monday.

pine bramble Oct 10, 2020, 8:04 PM

#

I cut them in half with scissors, immediately, when I discover a cable that does not pass USB data.

#

That's worse than getting a fly in your soup, in a restaurant.

pulsar junco Oct 10, 2020, 8:04 PM

#

at least the fly is protein

pine bramble Oct 10, 2020, 8:05 PM

#

;)

#

papillon

pulsar junco Oct 10, 2020, 8:05 PM

#

that's too much cholesterol for me

pine bramble Oct 10, 2020, 8:06 PM

#

hehe but you considered it, first. lol

pulsar junco Oct 10, 2020, 8:07 PM

#

idk the french for margarinefly

#

I suspect they would be horrified at the thought

north stream Oct 10, 2020, 8:07 PM

#

I keep the power-only ones for use with untrusted chargers, but mark them clearly. If you don't have another cable, do you have another device you could try it with?

merry bramble Oct 10, 2020, 8:08 PM

#

I unfortunately don't.

pine bramble Oct 10, 2020, 8:08 PM

#

I bet ten bux you also have a good cable tagging system, @north stream ;)

merry bramble Oct 10, 2020, 8:09 PM

#

And is there a way for me to find out if the cable will be good enough for this application? Like in the product details or something.

#

If you know what I'm saying.

pine bramble Oct 10, 2020, 8:09 PM

#

You can test that cable any way you like. For example, hook it to an Amazon Kindle and see if you can read the Kindle on the Desktop PC (look at files stored on Kindle).

#

If it's passing data it'll be obvious.

#

If it is power only I'd expect the advert to say so.

north stream Oct 10, 2020, 8:11 PM

#

I play with enough cables that I actually bought a cable tester, but that's overkill for most folks. My tagging system is re-using bread tags (picture swiped from the 'net).

📎 35.jpg

pine bramble Oct 10, 2020, 8:11 PM

#

They want to sell you things, so they should give you selling points so that you will do business with them.

#

@north stream Then I think I owe you at least $5 because I thought of a professional tagging system. I like the work-around better. ;)

merry bramble Oct 10, 2020, 8:14 PM

#

Alright, thanks a lot for the help, guys.

main olive Oct 10, 2020, 8:47 PM

#

i have a servo motor hooked up to my arduino. Everything should work, but it dosent. is it the code or something else? code:```cpp
#include <Servo.h>

Servo testservo;

uint32_t next;

void setup()
{
// the 1000 & 2000 set the pulse width
// mix & max limits, in microseconds.
// Be careful with shorter or longer pulses.
testservo.attach(9, 1000, 2000);

next = millis() + 500;
}

void loop()
{
static bool rising = true;

if(millis() > next)
{
if(rising)
{
testservo.write(180);
rising = false;
}
else
{
testservo.write(0);
rising = true;
}

// repeat again in 3 seconds.
next += 3000;

}

north stream Oct 10, 2020, 8:50 PM

#

Try moving the declaration for rising outside of loop (put it up by next)

main olive Oct 10, 2020, 8:53 PM

#

what do you mean by that? If i put rising = false up there that wont work

north stream Oct 10, 2020, 8:55 PM

#

Move the static bool rising = true; line up by the uint32_t next; line.

pine bramble Oct 10, 2020, 8:56 PM

#

Also, always initialize when you declare.

north stream Oct 10, 2020, 8:56 PM

#

Not required, really, C has rules for initializing variables.

pine bramble Oct 10, 2020, 8:56 PM

#

uint32_t next = 0;

main olive Oct 10, 2020, 9:00 PM

#

do need you need a driver to control a servo? The code kinda works. It does then it doesent

north stream Oct 10, 2020, 9:04 PM

#

What the code is doing under the hood is configuring a timer to produce a pulse width modulated (PWM) signal which the servo understands. Once it's set up, the timer takes care of it for you.

#

The signal level produced by the Arduino is fine as a servo input, so you don't need a hardware buffer.

obtuse spruce Oct 10, 2020, 9:08 PM

#

rising is fine where it is - it is static. no need to initialize next - the logic is clear in this case for next...

pine bramble Oct 10, 2020, 9:08 PM

#

https://softwareengineering.stackexchange.com/questions/223862/how-important-is-to-initialize-a-variable

#

There's no reason not to initialize. It's a good habit to cultivate.

obtuse spruce Oct 10, 2020, 9:09 PM

#

My 35+ years of C++ professional development says otherwise... but in the end - this has nothing to do with the OP's issue.

pine bramble Oct 10, 2020, 9:09 PM

#

;)

pulsar junco Oct 10, 2020, 9:10 PM

#

Do you not need to initialize it because it is set to a non garbage value before it's ever used?

obtuse spruce Oct 10, 2020, 9:12 PM

#

No - in this case, I wouldn't flag the non-initialization in review because it is clear from the code that it absolutely initialized to a value before it is used. AND because it is initialized using a time value, the initialization to 0 introduces another case to think about... which needn't be thought about because it is never used (due to initialization in setup). But really, it isn't a big deal - in this case - either way.

#

The code looks fine to me.

#

@main olive - I suggest adding this after the attach in setup():

   while (!testservo.attached()) {
     Serial.println("waiting for attachment...");
     delay(100);
   }

north stream Oct 10, 2020, 9:23 PM

#

The way I read it, every time loop() gets called, rising will get set to true (static or not). In C, static normally reflects variable scope, not volatility.

#

In my code, I normally make global variables static (unless I'm referencing them from elsewhere), as it helps the build process save bytes.

obtuse spruce Oct 10, 2020, 9:29 PM

#

No - that isn't what static inside a function means.

#

It means that it is initialized just once, the first time that function is called... but it retains the value from call to call. It is essentially a global variable that can only be used inside the function.

#

static at file scope means only visible within this file. It can be tricky to use correctly in a header file BTW.

#

https://en.cppreference.com/w/cpp/language/storage_duration#Static_local_variables

#

(aside: static at file scope will not change the size of the executable nor it's memory foot print. Only the size of the intermediate .o files)

#

@main olive - other thought - you didn't mention which board you are using ... are you certain that pin 9 supports PWM (and hence servos?)... not all GPIO pins support PWM and it varies by board.

main olive Oct 10, 2020, 9:49 PM

#

Im not sure, im using an Uno

#

Arduino

#

Oh and my servo i think is continuous.

tranquil fable Oct 10, 2020, 9:53 PM

#

Ummm . what happens to next += 3000 inside the infinite loop ?

main olive Oct 10, 2020, 9:59 PM

#

@obtuse spruce in the serial monitor it says it is not attached, or well, waiting for attachment

#

ok im going down to the basics. This dosent work, but all the things ive read and seen say should. Is there a problem with this?```cpp
#include <Servo.h>
Servo motor;

void setup(){
motor.attach(9);
}
void loop(){
motor.write(0);
}

north stream Oct 10, 2020, 10:22 PM

#

I think you may need to pause after motor.write()

#

Maybe just move that statement into setup() and leave loop() empty?

main olive Oct 10, 2020, 10:23 PM

#

ok lemme try

#

works

#

thanks!

gritty nest Oct 10, 2020, 10:32 PM

#

Hello All, so I am experiencing this weird thing with the Adafruit BNO055, every time I powered up the BNO055, I needed to calibrate the magnetometer (which is expected), I was using a Arduino Mega to read in mag values and create a compass. Now that I moved the BNO055 to the Arduino Due, for some reason every time on power up the BNO055 mag calibration value is always ‘3’ (which is not what is expected, we should have to recalibrate at start up). I am receiving erroneous compass readings and its waayy off. I am not sure if I screwed something up or not. The BNO055 can handle both 3.3V & 5 V logic so switching between Mega2560(5V logic) & Due(3.3V logic) should hopefully not have been the issue. Please any suggestions are welcomed! Thanks!

north stream Oct 10, 2020, 10:35 PM

#

I wonder if it's a driver initialization issue, a communication issue, a storage issue, or a power issue.

gritty nest Oct 10, 2020, 10:50 PM

#

Communication seems to be fine as I am receiving readings, I have BNO055 SDA/SCL pins connected to Due’s respective pins and Dues RX1 Pinned to a Mega TX1 pin. I have the Mega and Due connected in a Master/Slave config. Mega sends Due commands to process and receive answers back to Mega. This all seems to be working correctly

#

In terms of power I connected both to a LiPo 12 V 9600 Mah battery

#

Power may be issue as I have two 12 V motors and a 5 V rtk gps also connected

#

Has this been experience before? In terms of power

#

Could you elaborate on driver init issue? i am not too sure what that is

#

Gps is also connected to due on RX2

north stream Oct 10, 2020, 11:15 PM

#

I figure the driver has to initialize a bunch of stuff, such as whether the magnetometer has been calibrated. If something was off, it might think it was when it wasn't.

main olive Oct 10, 2020, 11:32 PM

#

ok so, i also improved it with adding a delay at void start. Now it looks like this:```cpp
#include <Servo.h>
Servo motor;

void setup(){
motor.attach(8);
motor.write(0);
delay(2000);
}
void loop(){
motor.write(180);
delay(1500);
motor.write(0);
delay(1500);
}

vivid rock Oct 10, 2020, 11:43 PM

#

just spent 20 minutes debugging a problem; turns out that implementation of function isWhitespace(c) is Adafruit's core doesn't match the documentation on Arduino website. Didn't occur to me that there is any room for different interpretations of something that simple. Arrrrrgh... 🤬

pulsar junco Oct 10, 2020, 11:44 PM

#

are they considering something whitespace that you don't, or the opposite or something else? V curious

vivid rock Oct 10, 2020, 11:46 PM

#

according to docs, \r, \n, and \f should be considered whitespace. In fact, the implementation only considers space and \t whitespace

pulsar junco Oct 10, 2020, 11:46 PM

#

hmmm

#

this causes the upset

vivid rock Oct 10, 2020, 11:46 PM

#

yeah, a very mild upset
🤬

pulsar junco Oct 10, 2020, 11:47 PM

#

I'm gonna finish my pizza to banish it

#

I suppose you can implement your own isReallyWhitespace()

vivid rock Oct 10, 2020, 11:49 PM

#

turns out they actually have a function which implements exaclty what I need; it is called isSpace. Unsurprisingly, in docs on arduino website this function is supposed to do something else. I had to read the source to find out what is happening.

pulsar junco Oct 10, 2020, 11:50 PM

#

mind linking source?

vivid rock Oct 10, 2020, 11:50 PM

#

https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/cores/nRF5/WCharacter.h

#

compare with https://www.arduino.cc/reference/tr/language/functions/characters/isspace/

pulsar junco Oct 10, 2020, 11:52 PM

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I thought .h files weren't supposed to have the full function in them, just defs/predicates/whatever the right term is

#

also seems like a reasonable first issue for someone to fix, maybe add the issue?

vivid rock Oct 10, 2020, 11:52 PM

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they can. for one-line functions it is common to put them in .h
I opened an issue

pulsar junco Oct 10, 2020, 11:52 PM

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ah gotcha

#

what does #if defined ( __GNUC__ ) mean?

vivid rock Oct 10, 2020, 11:57 PM

#

I guess __GNUC__ is a macro defined by GNU C compiler (gcc) , so it is defined if the code is being complied by gcc

#

which, afaik, is what is normally used internally by Arduino IDE.

pulsar junco Oct 10, 2020, 11:58 PM

#

weird that they don't define any functions if _ICCARM_

#

I guess this could be a "good first issue" or just update the documentation

obtuse spruce Oct 11, 2020, 12:13 AM

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Probably because the ICCARM compiler's standard headers already define them.

#

And - I bet - the definitions don't match exactly... cause that is very common with character class functions in various systems.

pulsar junco Oct 11, 2020, 12:14 AM

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aren't the defs in there the arduino specific versions of the C functions?

obtuse spruce Oct 11, 2020, 12:14 AM

#

Notice that all these functions, in the header file, have inline - which is why they are in the header file. inline in a .cpp file only helps that one file.

#

The standard C functions are all like isspace and isgraph. They are well defined by the standard... but... alas... are tangled up in the locale system, so - er - may or may not mean what you think they mean if you are on a system with locales (Linux for example).

#

I can't say why Arduino choose to make a new set...

pulsar junco Oct 11, 2020, 12:18 AM

#

extreme dedication to snake case?

#

*camel case

obtuse spruce Oct 11, 2020, 12:21 AM

#

and yes - @vivid rock - there is a bug in that file --- it is this: The definitions of isWhitespace and isSpace are reversed.

#

also - no idea why that file uses the idiom

return (isxxxx(c) == 0 ? false : true);

that's just verbose for no reason:

return isxxxx(c) != 0;

or just:

return isxxxx(c);

are just as good, and frankly, more clear

#

Oh - it looks like it is the documentation is wrong. Or at least? My Arudino (non adafruit) core has them they same way Adafruit does

pulsar junco Oct 11, 2020, 12:30 AM

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If they swap the two to fix the bug, they would also need to update the docs to indicate that isSpace(c) gives tab or space right? RN it says space char only.

obtuse spruce Oct 11, 2020, 12:32 AM

#

Looking at the core - I think the docs are wrong!

pulsar junco Oct 11, 2020, 12:33 AM

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well if they want it to match C, doesn't isspace(c) always check for \r,\n,\t,\f, and space?

#

but then they have the isWhiteSpace(c) fn which seems to want to be isspace(c)

#

it's sort of an update one or the other situation it seems, depends on what you want to be what

obtuse spruce Oct 11, 2020, 12:34 AM

#

latest arduino cores on my system both match Adafruits: isSpace is implemented as isspace and isWhitespace is implemented as isblank

#

which makes - isSpace/isspace the one that has the vertical line characters -- and isWhitespace/isblank the ones that have just the space and tab.

#

If you're really worried about it being consistent... don't call the Wiring ones - call the C ones - they're well defined and won't change!

pulsar junco Oct 11, 2020, 12:36 AM

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that's what I was gonna ask, why not just use the built in C functions in the first place!

vivid rock Oct 11, 2020, 2:29 AM

#

@obtuse spruce indeed it seems that the documentation needs to be fixed rather than the implementation.

#

How come no one ever noticed it before, i can't imagine

pulsar junco Oct 11, 2020, 2:32 AM

#

history happening before our eyes!

vivid rock Oct 11, 2020, 2:00 PM

#

bug report submitted.

hybrid dragon Oct 11, 2020, 4:14 PM

#

Hey can anyone tell me why the SPI display I have doesn't show anything when I run this?

void loop() {
  display.setCursor(0,0);
  Serial.println("Searching for Tegra");
  display.println("Hello!");
  display.display();
  delay(2000);
  display.clearDisplay();
  
}

#

Here's my setup function:

void setup() {
    Serial.begin(9600);
    display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
    display.display();
    delay(3000);
    display.clearDisplay();
    display.display();
    
    delay(2000);

}

#

nevermind i fixed it

dry salmon Oct 11, 2020, 9:19 PM

#

how can I troubleshoot connection errors using Feather M0 WiFi? Wireshark shows that the WINC1500 disconnects after the TLS handshake, but there are no errors in the handshake, I've loaded the CA certificate to the WINC1500, and OpenSSL doesn't see any problems with the server certificate. WiFiSSLClient does not expose any error details

stuck coral Oct 11, 2020, 9:54 PM

#

Did you upload the SSL cert?

#

To the WINC1500

dry salmon Oct 11, 2020, 9:54 PM

#

I'm getting socket error code -12, SOCK_ERR_CONN_ABORTED. The documentation says that the connection is closed by the peer, but Wireshark says that is not true.

#

yes, although maybe I should do it again

stuck coral Oct 11, 2020, 9:54 PM

#

Yeah, and update the WINC1500 firmware if you have not already

#

First

dry salmon Oct 11, 2020, 9:54 PM

#

I did have a problem with RabbitMQ sending incomplete certificate chains…

stuck coral Oct 11, 2020, 9:57 PM

#

If you have issues with RabbitMQ and SSL, try putting a proxy application like nginx in front of it. In my RabbitMQ deployment, a application load balancer is in front of the rabbitMQ MQTT listener and provides the TLS layer as well as adds a WAF

dry salmon Oct 11, 2020, 10:01 PM

#

that was it. I uploaded the certificates again now that socat does the tls for rabbitmq and now I can connect

#

I don't think the certificate uploader gave me an error before. I wonder what it uploaded

stuck coral Oct 11, 2020, 10:02 PM

#

Fantastic, if you do any large scale or professional deployments in the future give my suggestion a try 😜

dry salmon Oct 11, 2020, 10:02 PM

#

it's just a server for my house

#

I think now I just need to redo all the accounts. I saw somebody had solved a problem with RabbitMQ certificate chains by upgrading to a newer version, which didn't work for me, but in the process I accidentally wiped the configuration

stuck coral Oct 11, 2020, 10:05 PM

#

Ah, lol. Note that you can save and reload any config as a JSON file though you probably know that. And for connected embedded devices, the HTTP auth is fantastic if you are provisioning many devices

dry salmon Oct 11, 2020, 10:35 PM

#

it turns out I did not delete the configuration. The new Helm Chart for RabbitMQ uses a different base directory, so my configuration was just in the wrong place

stuck coral Oct 11, 2020, 10:36 PM

#

Oh thats good, making new config files is a pain. Having to reenter everything in the interface is even worse

north stream Oct 12, 2020, 2:06 AM

#

Hi guys, I have an Elegoo Smart Car and I want to try to modify its speed. I tried PWM with no luck so decided to do my own way similar to PWM (forward-delay-stop-delay loop). I got it working at times then I noticed a weird behavior. If I push the remote button that increases the delay time variable it keeps changing non-stop instead of changing one step. The infrared module light blinks only once so it doesn't seem to be a remote malfunction. This is my code that I am using for it https://hatebin.com/wqzhmskjmm. I hope anyone could help me fix that.

north stream Oct 12, 2020, 2:21 AM

#

You might want to clear results.value after acting on it, otherwise the loop will keep re-using the last received value.

#

yes, it worked.

#

i used results.value = 0; in the end of the loop

#

thank u so much :)\

#

🙂

woven wedge Oct 12, 2020, 6:13 AM

#

I'm running an arduino micro but it looks like my target script was designed for a teensy. I'm thinking that rather than rewriting the definitions for my arduino it would be easier to just buy a teensy. Unless the fix is super trivial like including all of the teensy libraries in my project or there's a library that does this.

woven wedge Oct 12, 2020, 6:51 AM

#

I guess this is a software issue since the arduino and teensy keyboard libraries exist independently. In that case I'm looking for a completed solution for grabbing key presses and sending via UART to a listening micro

#

Just the software that goes on the micro since I have the UART part

north stream Oct 12, 2020, 12:06 PM

#

If I understand correctly, the keyboard libraries allow you to configure the micro's USB interface as a keyboard HID device, so you can emulate a USB keyboard, and this is sort of the opposite of what you're describing, which seems like receiving keyboard data via USB and handing it off serially via a UART?

elder hare Oct 12, 2020, 3:37 PM

#

dont know if anyone remembers the ESP32 i got sent where there was a extra resistor soldered to the board from a via to the reset button xD well i removed that one and i uplaoded some code! and well.. it posts that wifi is up and running BUT i can't connect to it with socket for some reason :S there is no contact what so ever