#help-with-arduino | adafruit | Page 64

north stream Jun 30, 2020, 1:47 AM

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okay

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sorry but i think you would need to call so i can show you cause my mom is using the tablet

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sorry

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but thats the only way

reef ravine Jun 30, 2020, 1:48 AM

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sorry, my wife is watching TV so I can't use audio

north stream Jun 30, 2020, 1:49 AM

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ill just show you

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i wont talk

reef ravine Jun 30, 2020, 1:49 AM

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ok

north stream Jun 30, 2020, 1:49 AM

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thanks

upper rune Jun 30, 2020, 4:05 AM

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im trying to control a brushless motor with an ESC from an arduino, i have managed to get it to work with some fine tuning and the servo library, however for some reason i am unsure how to change the min max limits on the ESC so i am stuck with "15 degrees" so only 15 intervals between min and max speed. I have tried converting to using writeMiliseconds() instead, however that does not work (ESC wont respond). The ESC i am using is the "emax blheli 12a esc". does anyone know why writeMiliseconds() would be different to write() if i converted the angles correctly?

cedar mountain Jun 30, 2020, 4:17 AM

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What values are you sending in writeMicroseconds()?

upper rune Jun 30, 2020, 4:26 AM

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between 1670 and 2000

cedar mountain Jun 30, 2020, 4:31 AM

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So that'd be the equivalent of 120-180 degrees in the write()?

upper rune Jun 30, 2020, 4:31 AM

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i was doing 165-180 with write()

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i did 15/180 x 2000 to get lower value

cedar mountain Jun 30, 2020, 4:34 AM

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0-180 maps to 1000-2000, so 165 would be about 1917, I think.

upper rune Jun 30, 2020, 4:35 AM

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oh yea, oops

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ill try that

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still didnt work?, im going to try using softwareServo library instead to see if that makes any difference

cedar mountain Jun 30, 2020, 4:42 AM

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Actually, it looks like the Servo library defaults to a wider range of 544-2400 for angles 0-180, so the corresponding microsecond values would be higher than expected.

upper rune Jun 30, 2020, 4:45 AM

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ah, that could be it

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yes it works now, thanks

cedar mountain Jun 30, 2020, 4:50 AM

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Excellent! 👍

raw forum Jun 30, 2020, 9:21 AM

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Anyone have a clue how you could put an integer in a string? Like for example String x = "the machine is now running for ... minutes" and then on ... there needs to come an integer so actually String x = "the machine is now running for <int time> minutes"

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I need to send AT commands and those are strings but I need to add value's in it as well and I have no clue how I should do that

lone ferry Jun 30, 2020, 9:33 AM

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char x[100]; sprintf(x, "the machine is now running for %d minutes", 60); @raw forum

raw forum Jun 30, 2020, 9:34 AM

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@lone ferry thank you for helping, could you explain me what your doing exactly? So I can easily implement it in my project

lone ferry Jun 30, 2020, 9:35 AM

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char x[100]; reserves space for 99 characters and a special 0-character at the end of the string.

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sprintf(x, ...) will write characters into x depending on the format string, the machine is now running for %d minutes

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The %d in the format string tells sprintf to fill that in with an integer, in this case the constant 60.

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Note that if your string will be longer than 99 characters, you should change char x[...] to a larger number.

raw forum Jun 30, 2020, 9:39 AM

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What I now have actually is String gsATcommands [7]= {"AT+QFUPL=""cacert.pem"", XXXX , 100", "AT+QFUPL=client.cer,XXXX , 100",....

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and on the place XXXX

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their needs to come the length of an other string , so a value

lone ferry Jun 30, 2020, 9:41 AM

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You can't write it like that.

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(Why does discord keep eating my reply as I type it?)

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xxxx

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Ah, it removes comments that have 3 x's in them.

raw forum Jun 30, 2020, 9:43 AM

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I was just going to say, their is something wrong , cause I see you replying in a split second

lone ferry Jun 30, 2020, 9:43 AM

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Anyway, String x[] = { ... } defines an array of constants.

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But your XXXX strings are not constants.

raw forum Jun 30, 2020, 9:45 AM

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Ahhh okay , then I will need to count the length and put it in there as a constant

lone ferry Jun 30, 2020, 9:45 AM

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If it's always the same that's definitely the most optimal solution, especially on Arduino.

wispy crater Jun 30, 2020, 11:08 AM

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can any one pls help me to make a variable in arduin code? I do not know how to do that

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pls help me to make this program working....... this is causing so much trouble

📎 potentioservo.ino

lone ferry Jun 30, 2020, 11:20 AM

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@wispy crater Please explain what the error is and what you're trying to achieve.

wispy crater Jun 30, 2020, 11:20 AM

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umm..

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wait

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this is the problem

📎 Screenshot_229.png

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pls help

odd fjord Jun 30, 2020, 11:26 AM

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map requires 5 input values -- you are missing the lower value fpr the output range - try valPot1 = map (valPot1, 0, 1023, 0, 180);

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also look carefully at you r code -- you are not using the correct values for each servo -- the (1,2,3,4) settings don't match

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  valPot2 = analogRead(pot2);
  valPot2 = map (valPot2, 0, 1023, 180);
  servo1.write(valPot1);
  delay(15);``` shouldn't this be ```
  valPot2 = analogRead(pot2);
  valPot2 = map (valPot2, 0, 1023, 180);
  servo2.write(valPot2);
  delay(15);```

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and valPot3 = analogRead(pot3); valPot3 = map (valPot3, 0, 1023, 180); servo1.write(valPot3); delay(15); I think should be valPot3 = analogRead(pot3); valPot3 = map (valPot3, 0, 1023, 180); servo3.write(valPot3); delay(15);

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unless I misunderstand your intent

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you need to fix all 4 of the lines using map

lone ferry Jun 30, 2020, 11:33 AM

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Agreed

wispy crater Jun 30, 2020, 11:56 AM

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thank you

elder hare Jun 30, 2020, 12:19 PM

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this is the picture 16x16

📎 Yoshi.bmp

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https://cdn.discordapp.com/attachments/451155280177266688/727497913684721755/JPEG_20200630_141650.jpg

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what's wrong? xD

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this is python side

    def convertImage(self):
        try:
            img = Image.open(self.imagePath).convert("RGB")
            img_array = img.tobytes().hex()
            list = [f"0x{''.join(b)}" for b in batches(img_array, 6)]
            self.final = ",".join(list)

            print(self.final)
        except Exception as e:
            print(e)

this is the arduino side

      if (doc["pixArt"]) {
        int i;
        char *data = (char*) malloc(strlen(doc["pixArt"]));
        strcpy(data, doc["pixArt"]);
        char * pch = strtok (data, ",");
        while (pch != NULL) {
          //Serial.println(pch);
          leds[i] = strtoul(pch, 0, 16);
          i++;
          pch = strtok (NULL, ",");
        }
        FastLED.show();
      }

north stream Jun 30, 2020, 12:24 PM

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What's wrong with it?

elder hare Jun 30, 2020, 12:26 PM

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you dont see it? 😛

candid topaz Jun 30, 2020, 12:26 PM

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black color means led off?

elder hare Jun 30, 2020, 12:26 PM

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ye

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📎 unknown.png

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you see it doesn't match up 😛

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some pixels are way off 😛

north stream Jun 30, 2020, 12:28 PM

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Ah, colors are right, but they're arranged funny. Doesn't look like an X/Y problem. Perhaps your matrix is wired zigzag, with alternating rows going right to left and left to right.

elder hare Jun 30, 2020, 12:30 PM

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this works fine 😛

📎 unknown.png

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so im pretty confused

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sooooo

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i did a test img

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📎 unknown.png

north stream Jun 30, 2020, 12:47 PM

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The egg is pretty symmetrical, so wouldn't show the problem much. If my guess is right, your test image would show something like checkerboard stripes on the LED

elder hare Jun 30, 2020, 12:47 PM

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https://cdn.discordapp.com/attachments/451155280177266688/727504847632466031/JPEG_20200630_144428.jpg

north stream Jun 30, 2020, 12:47 PM

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Yup, that matches my guess.

elder hare Jun 30, 2020, 12:48 PM

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not with the test img xD

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the colors are OK

candid topaz Jun 30, 2020, 12:48 PM

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it could be solved with code, but...

elder hare Jun 30, 2020, 12:48 PM

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Left Right
Blue Green
green Blue

north stream Jun 30, 2020, 12:48 PM

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That's exactly what I said above: "Ah, colors are right, but they're arranged funny. "

elder hare Jun 30, 2020, 12:51 PM

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📎 unknown.png

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flipped the image

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and now it's correct 😛

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so @candid topaz you say it's possible to correct this in code?

candid topaz Jun 30, 2020, 12:52 PM

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because of strip wiring, you need on even rows draw line backwards

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your matrix wired like a snake 😄

elder hare Jun 30, 2020, 12:54 PM

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yea i noticed that xD

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stupid china stuff :p

candid topaz Jun 30, 2020, 12:55 PM

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probably they saved wires :))

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from right sode to next row left side

elder hare Jun 30, 2020, 12:55 PM

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true true but still xD

candid topaz Jun 30, 2020, 12:57 PM

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i think we need to count rows

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int i, ci; int row = 1;
if (i%16==0) { row++ }
if(row%2) { ci = 16-(i%16) } else { ci = i%16 }

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and set led[ci] = ...

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something like that

north stream Jun 30, 2020, 1:04 PM

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You could do that on the Python or Arduino side, whichever makes more sense to you.

elder hare Jun 30, 2020, 1:06 PM

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@candid topaz i see the data coming in but nothing comes up on my matrix

candid topaz Jun 30, 2020, 1:07 PM

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that was pseudo code 🙂

elder hare Jun 30, 2020, 1:13 PM

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hmmm think im gonna do it python side as i want the "magic" over there 🙂 i just want the ESP32 to read and display 🙂

wintry berry Jun 30, 2020, 4:00 PM

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Any idea why the arduino idea didn't open? it give me the "splash screen" for a moment and then just gone.

north stream Jun 30, 2020, 4:02 PM

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Could be a missing library or somesuch. I'll often debug things like that by trying to open it on the command line and seeing if there are any error messages.

wintry berry Jun 30, 2020, 4:03 PM

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let me see

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there is no error in the cmd

wintry berry Jun 30, 2020, 4:22 PM

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SOLVED - I had to re-download it, and now it is working ok again

safe halo Jun 30, 2020, 4:35 PM

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Anyone ever see this error
[E][WiFiClient.cpp:392] write(): fail on fd 55, errno: 11, "No more processes"
I only have a dual core and 1 process running on the second core as a continuous loop.
Anytime I try and get data from a web socket it throws the error

upper rune Jun 30, 2020, 5:21 PM

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So i am trying to controll a brushless motor/ESC with an arduino, i have got it to work however when controlling it with an arduino instead of a controller and reciever i only get 10% of the thrust and cannot modify the min max values of the ESC, would anyone know what is going on or how i could debug this? i have been controlling PWM with the servo library and i used writeMicroseconds(between arround 2000-2400) however when i use pulseIn() to see what the reciever is giving out i get values of 2000-4000, which only makes the motor beep becuase it is out of range when i use arduino, but using the controller makes the ESC change its min max values, could someone explain what is going on here or provide some documentation of how rc recievers work( i have a fs-ia6b)?

north stream Jun 30, 2020, 5:33 PM

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@safe halo I've seen errors like that when I forget to terminate a process or close a file descriptor in a loop: eventually the system runs out of process slots, file descriptors, or some other finite resource.

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@upper rune This page gives a good explanation https://www.pololu.com/blog/17/servo-control-interface-in-detail

solid stag Jun 30, 2020, 6:59 PM

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im trying to test if the first letter of a string is eaither x or y

lone ferry Jun 30, 2020, 7:00 PM

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if (string[0] == 'x' || string[0] == 'y')

solid stag Jun 30, 2020, 7:23 PM

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k thanks

undone harbor Jun 30, 2020, 8:48 PM

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I'm having a problem compiling a sketch in IDE and can't seem to find a solution so looking for any suggestions... when I run this code I get the error "conflicting declaration"... ```#if defined(TFTDisplay_3_5)
Adafruit_HX8357 tft = Adafruit_HX8357(TFT_CS, TFT_DC);
#endif
#if defined(TFTDisplay_2_4)
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
#endif

north stream Jun 30, 2020, 8:55 PM

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That might happen if both those symbols are defined

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Or if the library instantiates it for you

undone harbor Jun 30, 2020, 8:56 PM

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Oh duh... one is defined as True and the other as False... great catch

north stream Jun 30, 2020, 8:56 PM

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There is a way to have the preprocessor do things based on the value

undone harbor Jun 30, 2020, 8:57 PM

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Oh please tell me more as I like that idea... do you have an example?

north stream Jun 30, 2020, 9:00 PM

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like #if TFTDisplay_3_5 == True I think

undone harbor Jun 30, 2020, 9:01 PM

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Ok, thanks... I'll give that a try

north stream Jun 30, 2020, 9:02 PM

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Some useful examples here https://en.cppreference.com/w/cpp/preprocessor/conditional

wintry berry Jun 30, 2020, 9:04 PM

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Is there a way to power wemos d1 from a battery, but to get an indication if the battery level?

undone harbor Jun 30, 2020, 9:09 PM

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@north stream great link, thanks

north stream Jun 30, 2020, 9:10 PM

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I don't remember if the Wemos has an analog input, but if it does, you can probably monitor the battery voltage with a voltage divider to scale it to an appropriate (and safe) level: this is the usual approach.

wintry berry Jun 30, 2020, 9:12 PM

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@north stream let me see I think it have

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📎 esp8266-wemos-d1-mini-pinout.png

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there is 1!

north stream Jun 30, 2020, 9:13 PM

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I vaguely remember some of those boards won't let you use WiFi and ADC at the same time.

wintry berry Jun 30, 2020, 9:23 PM

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any alternative?

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@north stream can I read the analog input, save it in to a variable, and then use the wifi?

north stream Jun 30, 2020, 9:30 PM

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I don't know much about it, just giving you a heads-up that there may be an issue

safe shell Jun 30, 2020, 11:29 PM

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ESP32 ADC2 can't be used when wi-fi is in use, and it doesn't look like any of the ADC1 pins are exposed. See: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html

wanton mirage Jun 30, 2020, 11:38 PM

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Wondering if anyone has implemented the neotrellis on a teensy?

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Specifically wondering if the wire library is needed in addition to the adafruit see-saw libs

safe shell Jun 30, 2020, 11:58 PM

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@wintry berry I'm not sure exactly how to do it in Arduino, but in theory you could de-init the wifi each time you want to read the analog input, then set it back up. Or an outboard I2C or SPI ADC (but using more power). Keep in mind the battery voltage is fairly flat over most of its life, see the graph at: https://learn.adafruit.com/li-ion-and-lipoly-batteries/voltages. Could probably rig up an external circuit to trigger a digital input when the battery falls below a certain voltage.

red vale Jul 1, 2020, 1:38 PM

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Hey,
Is anyone here willing to collaborate on a project

north stream Jul 1, 2020, 2:27 PM

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You'll need to supply more information than that before anyone can decide.

reef shuttle Jul 1, 2020, 3:47 PM

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hey

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son i am here to help you

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provide us with informations

crisp halo Jul 1, 2020, 4:05 PM

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hey anyone know the output current of arduino digital pins?

clear valve Jul 1, 2020, 4:06 PM

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@crisp halo Which kind of arduino?

crisp halo Jul 1, 2020, 4:06 PM

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uno

clear valve Jul 1, 2020, 4:07 PM

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I believe its 40mA, though I think there's also a limit for current through all pins if you're using several pins

crisp halo Jul 1, 2020, 4:08 PM

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ohh means using more output pins there's more decrease in the output current?

lone ferry Jul 1, 2020, 4:09 PM

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The output current depends on what you attach to the pin. 40 mA is the maximum each individual pin can pull, but in total I think you can only be pulling 200 mA at a time.

clear valve Jul 1, 2020, 4:10 PM

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That lines up with the datasheet

📎 unknown.png

crisp halo Jul 1, 2020, 4:12 PM

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thanks much😄 @lone ferry & @clear valve for helping

sweet bloom Jul 1, 2020, 4:29 PM

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hey y'all, trying to connect an arduino with an hm-19 to my windows 10 computer...i can connect it to my phone using a testing app no problem but when i connect it to my computer it pairs, i get "Connected" for a very short period and then it goes backed to "Paired" and the red light on the bluetooth module turns off

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is this because i don't have an app make use of it upon connection or something?

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i've started to look into writing a script to make use of it, which lead me to find that it doesn't seem to support bluetooth/serial communication like an hc-06, but that i need to use gatt because hm-19, like hm-10 and hm-11 is BLE

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so, i'm trying to figure out those api's and what to do there...but i'm still concerned about the whole disconnecting and red light turning off thing

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if i get a script running that makes use of gatt, will i theoretically be in the clear?

sweet bloom Jul 1, 2020, 5:35 PM

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hmm, perhaps there's a bit more to it...tried using this: https://loginov.rocks/Web-Bluetooth-Terminal/ and i get the following:

Requesting bluetooth device...
"DSD TECH" bluetooth device selected
Connecting to GATT server...
GATT server connected
Getting service...
Service found
Getting characteristic...
Characteristic found
Starting notifications...
NotSupportedError: GATT Error Unknown.
"DSD TECH" bluetooth device disconnected, trying to reconnect...

golden plover Jul 1, 2020, 7:34 PM

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hi

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#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
int zmienna;
int pozycja;
int faza;
int buttonPushCounter = 0;
int buttonState = 0;
int lastButtonState = 0; 
void setup() {
pinMode(8, INPUT_PULLUP);
lcd.begin(16,2);   
Serial.begin(9600);
lcd.init();
lcd.backlight();
faza = 0;
}

void loop() {
buttonState = digitalRead(8);
int odczyt = analogRead(0);
odczyt = 1024 - odczyt;
zmienna = map(odczyt, 0, 1024, 0, 100);
int potencjometr = analogRead(3);
pozycja = map(potencjometr, 0, 1024, 0, 3);


if(pozycja == 0){
lcd.setCursor(2,0);
lcd.print("    DANE       ");
lcd.setCursor(0,1);
lcd.print("W:");
lcd.print(zmienna);
lcd.setCursor(4,1);
lcd.print("%           ");
//Serial.print(zmienna);
//Serial.println(" %");
delay(50);
}
if(pozycja == 1){
lcd.setCursor(2,0);
lcd.print("KONT. RECZNA");
lcd.setCursor(0,1);
lcd.print("Podlej Manualnie");
delay(50);
}
if(pozycja == 2){
  if (buttonState != lastButtonState) {
    if (buttonState == LOW) {
      buttonPushCounter++;
      Serial.println("on");
      Serial.print("number of button pushes: ");
      Serial.println(buttonPushCounter);
    } else {
      Serial.println("off");
    }
    delay(500);
  }
  // save the current state as the last state, for next time through the loop
  lastButtonState = buttonState;
if (buttonPushCounter % 4 == 0) {
faza = 0;
  } else {
faza = 1;
  }

lcd.setCursor(2,0);
lcd.print("    FAZY       ");
lcd.setCursor(0,1);

if(faza == 0){
lcd.print(" Faza wzrostu 1 ");
}
if(faza == 1){
lcd.print(" Faza wzrostu 2 ");
}
delay(50);
}
}```

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i want to change faza by pressing a button

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it changes faza to 1, but it can't change it to 0 later

north stream Jul 1, 2020, 7:40 PM

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The code looks okay to me, it should toggle faza every 4 detected presses of the button (if the potencjometr is in range 2)

golden plover Jul 1, 2020, 7:42 PM

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but it changes faza once then nothing is happening when i click it

south pulsar Jul 1, 2020, 7:42 PM

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havent programmed C# in a few months, whats the difference between static void and void?

north stream Jul 1, 2020, 7:45 PM

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Don't know about C# but in C/C++, static means local to a module.

golden plover Jul 1, 2020, 7:45 PM

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uhm

delicate coral Jul 1, 2020, 7:46 PM

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@south pulsar it means there's just one - it's not per instance.

golden plover Jul 1, 2020, 7:46 PM

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i will just mount toogle switch and hook it up to digital pin

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it will be easier lol

delicate coral Jul 1, 2020, 7:46 PM

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@golden plover why did you do the if (buttonPushCounter % 4 == 0)

golden plover Jul 1, 2020, 7:47 PM

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it's from arduino website

south pulsar Jul 1, 2020, 7:47 PM

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the code im looking at i found online using it to define a special neopixel animation function, and im not sure what the point of static void is for

delicate coral Jul 1, 2020, 7:47 PM

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because the way you've coded it, it turns on with one button click, then takes another 4 clicks to turn off.

golden plover Jul 1, 2020, 7:47 PM

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as they tried to help me on their server

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uhm

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so how to make it turning off by one click?

delicate coral Jul 1, 2020, 7:49 PM

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if (pozycja == 2)
{
if (buttonState != lastButtonState)
{
if (buttonState == LOW)
{
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.println(buttonPushCounter);
if (faza == 1)
{
faza = 0;
}
else
{
faza = 1;
}
}
else
{
Serial.println("off");
}
delay(500);
}
// save the current state as the last state, for next time through the loop
lastButtonState = buttonState;

    lcd.setCursor(2, 0);
    lcd.print("    FAZY       ");
    lcd.setCursor(0, 1);

    if (faza == 0)
    {
        lcd.print(" Faza wzrostu 1 ");
    }
    if (faza == 1)
    {
        lcd.print(" Faza wzrostu 2 ");
    }
    delay(50);
}

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deal with it in the "if (buttonState == LOW)" block

golden plover Jul 1, 2020, 7:52 PM

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Thank you!

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It worked in one try

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❤️

delicate coral Jul 1, 2020, 7:52 PM

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I'd cut out the buttonPushCounter stuff if you don't need it.

golden plover Jul 1, 2020, 7:52 PM

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i was playing with this stupid thing for 4 hours ;-;

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until it works, i won't cut anything XD

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one more question @delicate coral

delicate coral Jul 1, 2020, 8:04 PM

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@golden plover is Faza only supposed to have 2 modes? Or are you going to add more?

If you only have 2, it's cleaner as a bool:

bool faza;

//...

            if (buttonState == LOW)
            {
                buttonPushCounter++;
                Serial.println("on");
                Serial.print("number of button pushes: ");
                Serial.println(buttonPushCounter);
                // flip faza on button change
                faza = ! faza;
            }

//...
        if (!faza)
        {
            lcd.print(" Faza wzrostu 1 ");
        }
        else 
        {
            lcd.print(" Faza wzrostu 2 ");
        }

golden plover Jul 1, 2020, 8:04 PM

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is it possible to underline text on lcd?

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only two

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because i am making smart pot

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roots have two phases of growing

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and i want to have some control over it

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anyway

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is it possible to underline text on lcd?

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or make it look different than text around it

woven mica Jul 1, 2020, 8:07 PM

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You can blink a cursor under one character

golden plover Jul 1, 2020, 8:08 PM

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hmm

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i can't find word to describe it

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if you look into code

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there is line that displays "Faza wzrostu 1"

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i want to make "1" look different

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or entire line

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sorey, my english language is poor

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sorry*

north stream Jul 1, 2020, 8:10 PM

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Your English is fine, it's better than my Hungarian? Polish?

golden plover Jul 1, 2020, 8:11 PM

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polish

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anyway

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how to distinguish text

woven mica Jul 1, 2020, 8:12 PM

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Then you can blink the cursor at the number

golden plover Jul 1, 2020, 8:12 PM

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uhm

north stream Jul 1, 2020, 8:13 PM

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I don't think the LCD offers a lot of options, but you might be able to use a custom character to make it look different somehow.

golden plover Jul 1, 2020, 8:13 PM

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is it poasible to make cursor stay lit?

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yup, i was thinking about making custom char that inverts colora

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colors*

north stream Jul 1, 2020, 8:13 PM

#

There's a .noBlink() method available to turn off cursor blinking

golden plover Jul 1, 2020, 8:13 PM

#

oh

#

maybe i will try this

#

ok, whank you very much

#

i need to go sleep

#

bye

#

if i will meet any problems, i will write here

#

but tommorow

north stream Jul 1, 2020, 8:15 PM

#

We're happy to help

golden plover Jul 1, 2020, 8:15 PM

#

k

wanton mirage Jul 1, 2020, 8:18 PM

#

still messing with my neotellis, looksing for someone familiar with the adafruit seesaw and i2c

#

I'm trying to run examples on a teensy 3.6 and I don't see how to specify which i2c connection it is on

north stream Jul 1, 2020, 8:21 PM

#

I think you can use Wire, Wire1, Wire2, or Wire3 to specify the different interfaces

wanton mirage Jul 1, 2020, 8:21 PM

#

yes, but the adafruit_neotrellis library doesn't seem to use wire

north stream Jul 1, 2020, 8:23 PM

#

Hmm, I don't know if you'd need to modify it. I did for a vaguely-similar project once.

wanton mirage Jul 1, 2020, 8:23 PM

#

I guess it was all intended for arduino hardware with only one bus

north stream Jul 1, 2020, 8:24 PM

#

The libraries do occasionally get updated, so the default behavior is the same, but there's an optional parameter you can use to specify a different interface. But not all of the libraries have this.

wanton mirage Jul 1, 2020, 8:28 PM

#

Do you know if I must use a 3.3v on Vin if I'm communicating with a teensy? I also have 5v available and they seem to say that it's prefered

wanton mirage Jul 1, 2020, 9:37 PM

#

from adafruit_seesaw.cpp:

#

Adafruit_seesaw::Adafruit_seesaw(TwoWire *i2c_bus) {
if (i2c_bus == NULL) {
_i2cbus = &Wire;
} else {
_i2cbus = i2c_bus;
}
}

#

I need to tell it to communicate on bus 1

#

so the question is: Is there a line of code I can add to adafruit_neotrellis sketches to tell it I'm using i2c bus 1?

#

or do I have to fork the libraries

#

Adafruit_seesaw(TwoWire Wire1) maybe

#

nope

cedar mountain Jul 1, 2020, 9:54 PM

#

I'd expect something like Adafruit_seesaw(&Wire1).

wanton mirage Jul 1, 2020, 9:57 PM

#

error: conflicting declaration 'Adafruit_seesaw& Wire1'

cedar mountain Jul 1, 2020, 10:00 PM

#

That's odd. To clarify, this wouldn't be an edit of the library, but just how you'd instantiate the Seesaw object in your own code.

wanton mirage Jul 1, 2020, 10:02 PM

#

yup, I just don't see how the adafruit_neotrellis does it

cedar mountain Jul 1, 2020, 10:02 PM

#

Couldn't say offhand.

wanton mirage Jul 1, 2020, 10:05 PM

#

from the seesaw documentation:

#

Adafruit_seesaw (TwoWire *Wi=NULL)

#

I don't know enough about syntax to know how to use that

#

it seems to say that it is a "protected attribute"

cedar mountain Jul 1, 2020, 10:08 PM

#

You'd want to find where the Neotrellis code initializes the Seesaw library.

wanton mirage Jul 1, 2020, 10:15 PM

#

so I guess Iwould be editing the library

wanton mirage Jul 1, 2020, 10:54 PM

#

fired off an email to support

atomic goblet Jul 1, 2020, 11:09 PM

#

Hello, i got a (hopefully) simple problem. I tried installing an RTC ds3231 modul and it works fine with the sketch. I tried implementing it into my code and while it imports hours and minutes truthfully it is kind of stuck on the seconds

#

📎 unknown.png

cedar mountain Jul 1, 2020, 11:15 PM

#

So it appears you are setting now once at the start of the function, but then looping 200 times with the same value, instead of updating it as the time advances.

atomic goblet Jul 1, 2020, 11:15 PM

#

The upper number counts from 1 to 200 and the lower number should show seconds but its just stuck on varying numbers between 1-59

📎 ezgif.com-video-to-gif.gif

#

So. i just put my now in the loop?

cedar mountain Jul 1, 2020, 11:15 PM

#

Yup

#

Or else just use loop() as your loop instead of having a separate inner loop.

atomic goblet Jul 1, 2020, 11:17 PM

#

So just move the clock loop out of the dimmer loop?

cedar mountain Jul 1, 2020, 11:18 PM

#

The easiest modification would be to put the now() call inside. I'm not sure what the overall structure of your code needs to do.

atomic goblet Jul 1, 2020, 11:19 PM

#

Im trying to build a small dimming modul for a huge tank light. I wanted to have a clock shown on the display as well as the state of brightness and maybe temprature later

#

But its a first time for me and i only had same java lectures at uni, so im like 99% confused all the time.. 🙃

#

What happens when the loop has different delays built into it?

cedar mountain Jul 1, 2020, 11:23 PM

#

The delays will happen whenever they execute. The best practice would be to call now() just before you want to display the time, so that it will provide the time "right now" as opposed to getting the time, then delaying, and then displaying a time which is now a little old.

atomic goblet Jul 1, 2020, 11:29 PM

#

Ok, what am i missing? I moved it outside of the loop and now it is stuck again

#

📎 unknown.png

cedar mountain Jul 1, 2020, 11:31 PM

#

So that code now displays the time, and then starts your 200-second dimmer loop, without updating the time until those 200 seconds have elapsed.

atomic goblet Jul 1, 2020, 11:33 PM

#

😦

#

So it can loop two loops at once?

#

*cant

cedar mountain Jul 1, 2020, 11:35 PM

#

What you had the first time was almost right. You just needed to move the now() call inside the for loop so that it would always display the current time instead of the time when the program started.

atomic goblet Jul 1, 2020, 11:37 PM

#

Yes, i tried that version. But im not sure it will work out at the end.
Because there will be no for function in the final version. There will just be a function that adjust the brightness acording to the time given by the rtc.
But it should work as soon as i kick out the for loop`

#

?

cedar mountain Jul 1, 2020, 11:37 PM

#

I'm sorry, I didn't understand that.

atomic goblet Jul 1, 2020, 11:38 PM

#

is there a switch function in c+?

cedar mountain Jul 1, 2020, 11:39 PM

#

Possibly instead of using delay(), you want to periodically check the Arduino's timer with millis() and choose actions to take based on overlapping time intervals? That's a common application structure when you need to have multiple loops happening "at the same time".

#

Yes, there's indeed a switch / case statement.

atomic goblet Jul 1, 2020, 11:41 PM

#

When turning of the loop it works.. 🥳

📎 unknown.png

#

Possibly instead of using delay(), you want to periodically check the Arduino's timer with millis() and choose actions to take based on overlapping time intervals? That's a common application structure when you need to have multiple loops happening "at the same time".
@cedar mountain i dont exactly understand the millis things. It will give back different times while the loop goes on?

#

oh. so it just gives back a time instad of delaying the whole board?

stuck coral Jul 1, 2020, 11:48 PM

#

I think @cedar mountain is recommending to use multitask using statments such as if(millis()-lastTaskOne>=INTERVAL) { lastTaskOne = millis(); YOUR CODE HERE } within your main loop. Then you can have multiple of these if statments and run tasks say once every second, or 200 ms

atomic goblet Jul 1, 2020, 11:56 PM

#

Mh. 😶 i dont understand

#

but i understand the problem. Bc this does not refresh the time any more ..

📎 unknown.png

stuck coral Jul 2, 2020, 12:05 AM

#

What are you trying to do at regular intervals?

#

Draw to the screen and..?

rotund dirge Jul 2, 2020, 12:05 AM

#

hey i have a problem, I am working on an rc tank and basically i am using the add fruit motor driver: DRV8833. I am using 2 dc motors and I have one of them working going both directions and the other only spins one way even if it outputs negative, what can i do

atomic goblet Jul 2, 2020, 12:07 AM

#

📎 IMG_20200702_020736.jpg

rotund dirge Jul 2, 2020, 12:11 AM

#

📎 image0.jpg

#

I am using a adafruit radio

stuck coral Jul 2, 2020, 12:32 AM

#

I dont really understand @atomic goblet, if you were to name functions for all your tasks you want to run what would you call them? Im trying to write you a simple example

#

@rotund dirge I dont know what you mean by

the other only spins one way even if it outputs negative

atomic goblet Jul 2, 2020, 12:35 AM

#

So i did this. Which works fine. (onhour 1-3 + offhour are defined above)

📎 unknown.png

rotund dirge Jul 2, 2020, 12:35 AM

#

@stuck coral I am trying to have the motors spin two ways, One spins both ways and the others spins only one way

atomic goblet Jul 2, 2020, 12:35 AM

#

🙂

rotund dirge Jul 2, 2020, 12:36 AM

#

when i check the speed definition it says that both are negative

stuck coral Jul 2, 2020, 12:39 AM

#

@atomic goblet are you trying to have it update the display once per hour?

#

@rotund dirge do you have a multimeter?

rotund dirge Jul 2, 2020, 12:41 AM

#

Yeah

atomic goblet Jul 2, 2020, 12:52 AM

#

This it what it looks like finished. Ticking clock , percentage of led usage and temperature

📎 JPEG_20200702_025135.jpg

#

@atomic goblet are you trying to have it update the display once per hour?
@stuck coral At the moment it does update the % once every loop i think?

stuck coral Jul 2, 2020, 12:53 AM

#

@rotund dirge so if you remove the motor not doing what you want, and you drive the H bridge both directions, can you see the voltage going from +VDD to -VDD?

#

@atomic goblet are you trying to do something by a time of day, or have it change on an interval?

atomic goblet Jul 2, 2020, 12:54 AM

#

time of day

stuck coral Jul 2, 2020, 12:57 AM

#

Ah, are trying to multitask?

atomic goblet Jul 2, 2020, 1:06 AM

#

Yes thats the problem - i would love to add a sunset and a sundown but it might interfere with my clock again

reef ravine Jul 2, 2020, 1:07 AM

#

so we are all on the same page, you would like to display the time, temperature, and LED level always and vary the light level based on time of day?

atomic goblet Jul 2, 2020, 1:09 AM

#

Yes. nice summary. i might need some sleep..

reef ravine Jul 2, 2020, 1:10 AM

#

i would get the clock working perfectly, add temp, add light level, then it'll be easy to vary the light level based on accurate time

atomic goblet Jul 2, 2020, 1:15 AM

#

Yes. that sounds perfect. Now lets look at the implementation.. ah wait. Im going to bed. Thanks for helping, i might ask some questions tomorrow again. Nighty !

reef ravine Jul 2, 2020, 1:15 AM

#

lol, pls do!

rotund dirge Jul 2, 2020, 1:22 AM

#

@stuck coral I figured how to get both to turn in the right direction but now one just stutters

#

@stuck coral

📎 video0.mov

reef ravine Jul 2, 2020, 1:28 AM

#

@rotund dirge both motors are wired identically?

rotund dirge Jul 2, 2020, 1:36 AM

#

@reef ravine no one acts normal the other is all jittery

reef ravine Jul 2, 2020, 1:37 AM

#

if you swap the motor connectors, does the same motor act up or does the other one?

rotund dirge Jul 2, 2020, 1:38 AM

#

Yes if I swap then it still acts weird

reef ravine Jul 2, 2020, 1:38 AM

#

the same motor?

rotund dirge Jul 2, 2020, 1:39 AM

#

The motor is not the problem

#

It is the spot

stuck coral Jul 2, 2020, 1:39 AM

#

Well if you swap them and that motor still does not work, and you didnt swap it in the code, it seems to me a motor issue

small violet Jul 2, 2020, 2:40 AM

#

make sure there is no unintended resistance for the shaft

#

also check for faulty wires, they mess with pwm

reef shuttle Jul 2, 2020, 9:38 AM

#

hey

#

what is the difference between PIC and AVR

#

which one is powerfull

atomic goblet Jul 2, 2020, 10:16 AM

#

So finally a question that is really fitting this discord. I am using Adafruit_SSD1306 and it cant display the °-Symbol. Any workarounds?

#

It just displays missing no

candid topaz Jul 2, 2020, 10:20 AM

#

you need to render bitmap i gues because you can display only "ASCII" symbols

atomic goblet Jul 2, 2020, 10:22 AM

#

I tried importing a font. But its huge.

#

Acording to here https://learn.adafruit.com/adafruit-gfx-graphics-library/using-fonts

Adafruit Learning System

Adafruit GFX Graphics Library

Show those pixels who's boss!

#

and here https://www.arduino.cc/en/Reference/TFTSetTextSize

Arduino - TFTSetTextSize

Open-source electronic prototyping platform enabling users to create interactive electronic objects.

#

Theres no way to fine tune the text size?

#

you need to render bitmap i gues because you can display only "ASCII" symbols
@candid topaz Or i could just let it draw a circle.. 😂 which is a cheap solution but it would work

stuck coral Jul 2, 2020, 10:50 AM

#

@reef shuttle I would not call either PICs or AVRs "powerful", they are both very low cost and low power with minimal resources. ARM would be a choice for "power"

golden plover Jul 2, 2020, 11:42 AM

#

hi

#

https://pastebin.pl/view/c408e608

Untitled - Pastebin

Pastebin.pl is a website where you can store code/text online for a set period of time and share to anybody on earth

#

i want to do podlewanie(); every two hours when zmienna is below 80 or 55 (depends on faza)

#

@delicate coral

#

idk how to implement it

#

it needs to run in background

#

but only when pozycja is 0

stuck coral Jul 2, 2020, 11:52 AM

#

I would recommend something similar to the following-

unsigned long podlewanieLastExec = 0;
void loop(){
  if(millis()-podlewanieLastExec>=7200000){
    podlewanieLastExec = millis();
    podlewanie();
  }
}

For your other two evaluations, do you want to evaluate your zmienna and/or pozycja every two hours, or constantly after two hours after the last time podlewanie() was called? If the first option, then you can add another if statement inside the one I provided, or for the second option extend the if statement to be similar to - if(millis()-podlewanieLastExec>=7200000 && zmienna<80 && pozycja==0){}

#

Then it will "run in the background" so you can do other tasks

golden plover Jul 2, 2020, 11:55 AM

#

hmm

#

i want to do podlewanie(); every two hours when zmienna is under 80

stuck coral Jul 2, 2020, 11:57 AM

#

Maybe do unsigned long long podlewanieLastExec = 0; when you define it to allow it to run longer. And I show you how to above^

#

7200000 is two hours in milliseconds

golden plover Jul 2, 2020, 11:58 AM

#

so your code excutes podlewanie(); every two hours in background?

stuck coral Jul 2, 2020, 11:58 AM

#

So if 2 hours have passed since the last time podlewanieLastExec was set by millis(), then the if statement will be true

golden plover Jul 2, 2020, 11:58 AM

#

so your code excutes podlewanie(); every two hours in background?

stuck coral Jul 2, 2020, 11:58 AM

#

Yes

golden plover Jul 2, 2020, 11:59 AM

#

k, lemme test it

#

uhm

#

it;s freezing entire code

#

  buttonState = digitalRead(8);
  int odczyt = analogRead(0);
  odczyt = 1024 - odczyt;
  zmienna = map(odczyt, 0, 1024, 0, 100);
  int potencjometr = analogRead(3);
  pozycja = map(potencjometr, 0, 1024, 0, 3);
if(millis()-podlewanieLastExec>=1000){
    podlewanieLastExec = millis();
    podlewanie();
  }
  if (pozycja == 0)
  {
    lcd.setCursor(2, 0);
    lcd.print("    DANE       ");
    lcd.setCursor(0, 1);
    lcd.print("W:");
    lcd.print(zmienna);
    lcd.setCursor(5, 1);
    lcd.print("%           ");
    delay(50);
  }```

#

i added this like that

#

i set 1000 at the moment to test it

candid topaz Jul 2, 2020, 12:01 PM

#

it runs every second

golden plover Jul 2, 2020, 12:01 PM

#

yes

#

but not in background ;-;

candid topaz Jul 2, 2020, 12:02 PM

#

oh you have 5 seconds "delay" in your method

#

check "protothreads" i think

stuck coral Jul 2, 2020, 12:02 PM

#

Make sure not to block in podlewanie() and ^

golden plover Jul 2, 2020, 12:02 PM

#

podlewanie is 5 second long function

stuck coral Jul 2, 2020, 12:02 PM

#

I think protothreads are a bit much for this

candid topaz Jul 2, 2020, 12:03 PM

#

no, its only switch case to delay 😄

golden plover Jul 2, 2020, 12:03 PM

#

it turns on pump for 5 seconds to water the plants

candid topaz Jul 2, 2020, 12:03 PM

#

10 lines of code

stuck coral Jul 2, 2020, 12:03 PM

#

Ah, you need to rewrite your podlewanie() to be non-blocking, and create another if statment to turn off the pump every seconds, after podlewanie() was executed

#

And @candid topaz but thats another unneeded dependancy for ten lines of code anyways

candid topaz Jul 2, 2020, 12:04 PM

#

yeah, it could be solved in millis way

golden plover Jul 2, 2020, 12:05 PM

#

uhm

#

so how to make it work 😄

stuck coral Jul 2, 2020, 12:05 PM

#

I can give you an example, one moment

golden plover Jul 2, 2020, 12:05 PM

#

k

#

i found one thing

#

it's not doing it in background

#

it freezes for 5 seconds while the pump is on

stuck coral Jul 2, 2020, 12:07 PM

#

Yes, because you are blocking

golden plover Jul 2, 2020, 12:07 PM

#

k

#

i can't realize how to make podlewanie() non-blocking

stuck coral Jul 2, 2020, 12:07 PM

#

Your processor can only do one thing at a time, you need to learn how to multitask and I am writing you a example for your use case

#

bool pumpRunning = false;
unsigned long lastExec = 0;

void pumpOn(){
  pumpRunning = true;
  // Start the pump
}

void pumpOff(){
  pumpRunning = false;
  // Stop the pump
}

void loop(){
  if(millis()-lastExec>=7200000){
    lastExec = millis();
    pumpOn();
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
  }
}

This should do it, your microcontroller does not have a RTOS on it, there is no conecpt of multithreading like on your computer you're using now

#

Does this make sense? Then you can do other stuff in loop, make sure not to block in other functions so your pump doesnt stay on for longer then you want

golden plover Jul 2, 2020, 12:13 PM

#

mhm

#

now, i need to do it depending on faza value and zmienna value

stuck coral Jul 2, 2020, 12:15 PM

#

Okay, add in your evaluations as needed. Do you want to evaluate the variables once every two hours, or constantly after every two hours?

golden plover Jul 2, 2020, 12:16 PM

#

can you describe it more simple?

#

my english isn't the best so i can't understand you properly

stuck coral Jul 2, 2020, 12:18 PM

#

Sure, so every two hours, do you want it to check the faza and zmienna variables and if not true, wait two more hours, or after two hous wait until faza and zmienna are true?

grand needle Jul 2, 2020, 12:18 PM

#

Hey guys, this is killing me. I've been a mobile dev for over 10 years but I just don't think I "get" multiple classes inside of Arduino. Can anyone point me to a good resource to learn?

golden plover Jul 2, 2020, 12:18 PM

#

yes

stuck coral Jul 2, 2020, 12:19 PM

#

@grand needle you mean with the Arduino framework itself?

golden plover Jul 2, 2020, 12:19 PM

#

i want to check it every two hours and if they are under some value, excute pumpOn

grand needle Jul 2, 2020, 12:19 PM

#

I would like to build a single class "Bender" who creates instances of classes that make up a bender, "Antenna", "Eyes", "clock" etc

stuck coral Jul 2, 2020, 12:20 PM

#

You will need to be more specific about which option I talked about @golden plover they could both be describes like that

golden plover Jul 2, 2020, 12:20 PM

#

okay

stuck coral Jul 2, 2020, 12:21 PM

#

@grand needle I would look at C++ resources such as this http://www.cplusplus.com/doc/tutorial/classes/ this website has further articles on inheritance and everything youll need

#

It is more a C++ question, not really an Arduino question

golden plover Jul 2, 2020, 12:22 PM

#

after two hours after one pumping i want to turn on the pump if zmienna is below 80 and faza is 0 or when the faza is 1 and zmienna is below 55. Otherwise wait next two hours

stuck coral Jul 2, 2020, 12:23 PM

#

Okay, then I would update my example to reflect this-

void loop(){
  if(millis()-lastExec>=7200000){
    lastExec = millis();
    if(zmienna<80 && faza==0){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
  }
}

candid topaz Jul 2, 2020, 12:24 PM

#

every 2 hours check if we need to run pump? 🙂

golden plover Jul 2, 2020, 12:25 PM

#

  if(millis()-lastExec>=7200000){
    lastExec = millis();
    if(zmienna<80 && faza==0){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
  }
 if(zmienna<55 && faza==1){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
}```

#

like that?

#

i made it for two cases

stuck coral Jul 2, 2020, 12:26 PM

#

No, that will not work unless Im not seeing it right

golden plover Jul 2, 2020, 12:26 PM

#

what you mean?

stuck coral Jul 2, 2020, 12:27 PM

#

if(zmienna<55 && faza==1){ } this will be constantly evaluated

golden plover Jul 2, 2020, 12:28 PM

#

evaluated?

#

can you just write it properly?

#

  if(millis()-lastExec>=7200000){
    lastExec = millis();
    if(zmienna<80 && faza==0){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
 if(zmienna<55 && faza==1){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
  }
}```

#

like that?

stuck coral Jul 2, 2020, 12:34 PM

#

Are you trying to keep the pump on if zmienna is more than 55 and faza is 1 after you checked that zmienna is less then 80 and faza is 0? That is what that will do

golden plover Jul 2, 2020, 12:35 PM

#

no

#

https://pastebin.pl/view/dbf8ed5c

Untitled - Pastebin

Pastebin.pl is a website where you can store code/text online for a set period of time and share to anybody on earth

#

at the moment it looks like that but not working

candid topaz Jul 2, 2020, 12:38 PM

#

pumpOn and off should have digitalWrite, or serial print for debuging

golden plover Jul 2, 2020, 12:38 PM

#

i saw it now

#

wait

#

i think that it works

#

@stuck coral thank you, it is working half way

#

now add one more if statement for case with faza = 1 and zmienna <55

#

and it will be everything

stuck coral Jul 2, 2020, 12:42 PM

#

Np, Im sure you'll get it fully working, keep at it. Do you want to evaluate that with the other evaluation?

golden plover Jul 2, 2020, 12:42 PM

#

can you write it more simplified

#

i don't know what is evaulation 😄

stuck coral Jul 2, 2020, 12:43 PM

#

if((zmienna<80 && faza==0) || (faza == 1 && zmienna < 55)){} is this what you're looking for? And to check if a statement is true or false

golden plover Jul 2, 2020, 12:43 PM

#

that's it

#

i forgot that || thing is present

#

i will check it fast

#

yay

#

it's working

#

is it possible to turn on pump for 5 seconds when it waits 2 hours?

#

it was one feature that i added before, but it is no more working

#

just excute pumpOn and after 5 seconds excute pumpOff?

stuck coral Jul 2, 2020, 12:50 PM

#

You mean like constanly every two hours as a sort of different mode? I would just add a boolean to the if statement if((zmienna<80 && faza==0) || (faza == 1 && zmienna < 55) || constMode){}

#

Then set constMode as true elsewhere in your code where you would enable that

golden plover Jul 2, 2020, 12:53 PM

#

  {
    lcd.setCursor(2, 0);
    lcd.print("KONT. RECZNA");
    lcd.setCursor(0, 1);
    lcd.print("Podlej Manualnie");
    if (buttonState == 0)
    {
      pumpOn();
      delay(5000);
      pumpOff();
    }
    delay(50);
  }```

#

just made it that way and it works

#

it freezes fot 5 seconds, but only 5 seconds

north stream Jul 2, 2020, 12:55 PM

#

Yeah, that delay(5000) does nothing but delay: you'd have to use the same "multitasking" sort of code to implement the delay without freezing.

stuck coral Jul 2, 2020, 12:55 PM

#

void loop(){
  if(millis()-lastExec>=7200000 || buttonPressed){
    lastExec = millis();
    if((zmienna<80 && faza==0) || (faza == 1 && zmienna < 55 || buttonPressed)){ // If not true, will wait two more hours to check if we need to turn on the pump
      pumpOn();
      buttonPressed = false;
    }
  } else if (millis()-lastExec>=5000 && pumpRunning){
    pumpOff();
  }
}

I think this may be a clever way to add to the previous code. I need to start working, other people here are also very helpful

golden plover Jul 2, 2020, 12:56 PM

#

mhm

#

i will just leave as it is

#

it works as intended

#

i need this delay

north stream Jul 2, 2020, 12:57 PM

#

I prefer to precalculate the time compare value ```arduino
static unsigned long now;
static unsigned long next;
[...]
void loop() {
now = millis();

if (now > next) {
// do stuff
next = now + 5000;
}
}

golden plover Jul 2, 2020, 12:57 PM

#

i mean that is useful

#

mhm

stuck coral Jul 2, 2020, 12:58 PM

#

Ohhh does that help with rollover @north stream? Thats very clever

north stream Jul 2, 2020, 12:58 PM

#

It makes rollover ... different, but I think there's still a corner case.

golden plover Jul 2, 2020, 1:01 PM

#

ok, i will just add temperature monitoring and light level displaying

#

then make case for it and 3d print it

#

thank you very much for help!

#

❤️

wintry berry Jul 2, 2020, 5:36 PM

#

what I'm doing wrong with the "String()" command?
request->send_P(200, "text/plain", String(digitalRead(1)));

this is the error
exit status 1 no matching function for call to 'AsyncWebServerRequest::send_P(int, const char [11], String)'

north stream Jul 2, 2020, 5:38 PM

#

I'm guessing here, but perhaps send_P is expecting a character pointer instead of a String object?

wintry berry Jul 2, 2020, 5:39 PM

#

all I did is to change "test" with String(digitalRead(1))

#

the "test" work fine

#

this is the original code that work fine:

request->send_P(200, "text/plain", "test");

north stream Jul 2, 2020, 5:40 PM

#

That won't work: "test" is a character pointer, String() returns a string object.

wintry berry Jul 2, 2020, 5:41 PM

#

how do I change integer to be character pointer?

north stream Jul 2, 2020, 5:41 PM

#

Let's take a step back: what are you actually trying to do?

wintry berry Jul 2, 2020, 5:42 PM

#

read a switch status with wemos. and send the data to other wemos.

north stream Jul 2, 2020, 5:44 PM

#

When you say "send the data", what do you want to send? "1" or "0", maybe? Or perhaps "True" or "False"? Or "open" or "closed"? Or something else?

wintry berry Jul 2, 2020, 5:46 PM

#

an integer will be the best

#

I got the code from here https://randomnerdtutorials.com/esp8266-nodemcu-client-server-wi-fi/

Random Nerd Tutorials

ESP8266 Client-Server Wi-Fi Communication Between Two Boards (NodeM...

Create an HTTP communication between two ESP8266 NodeMCU boards to exchange data via Wi-Fi without an internet connection. Program your ESP8266 with Arduino IDE.

north stream Jul 2, 2020, 5:47 PM

#

I'm not sure send_P() supports sending integers

wintry berry Jul 2, 2020, 5:48 PM

#

and I commented out everything related to the temperature sensor

north stream Jul 2, 2020, 5:49 PM

#

That example converts numbers to C++ Strings and then converts those to C strings, so you could do it that way: ```arduino
request->send_P(200, "text/plain", String(digitalRead(1)).c_str());

#

I think that will either send "0" and "1" strings or perhaps "True" or "False" (depending on how String() converts boolean values)

wintry berry Jul 2, 2020, 5:51 PM

#

I'm trying to flash it..

north stream Jul 2, 2020, 5:51 PM

#

You could also skip all those conversions by using a ternary operator: arduino request->send_P(200, "text/plain", digitalRead(1) ? "1" : "0");

wintry berry Jul 2, 2020, 5:52 PM

#

and then I can replace the "1" : "0" with other text like "ON" : "OFF" ?

north stream Jul 2, 2020, 5:52 PM

#

Yes, that's an advantage of doing it that way

#

You can send whatever pair of strings you like

wintry berry Jul 2, 2020, 5:55 PM

#

I was able to flash the fist line, but the receiver didn't show anything, now I'm trying to flash the other line.

#

I got this error
error: espcomm_upload_mem failed

#

I try to reconnect it to the usb and flash again, and it seam to flash it, but the receiver don't seams to like it 😩

north stream Jul 2, 2020, 6:01 PM

#

Time for debugging. The example you posted seemed to try to stand up a server that would respond to specific requests, but what you're describing is different, more like a data link.

#

I'd probably use print debugging and have the receiver print out whenever it receives anything, then print out how many bytes it got, and then print out what those bytes are

wintry berry Jul 2, 2020, 6:04 PM

#

mmm let me see

wanton bramble Jul 2, 2020, 10:12 PM

#

hello. Im an arduino novice and learning how to use i2c right now. Im unsure how I should store bytes I receive from Wire.read(). the read() documenation page says in returns a byte but the example code stores it as a char. other examples i've seen stores it as an int or in an array. this has made me a little confused. shouldnt i just stoore it as a byte?

cedar mountain Jul 2, 2020, 10:17 PM

#

It's up to you. If the data are printable characters that you're going to output over a serial port, then char might make the best sense. If it's a number you're going to calculate with, then perhaps an int. If it's binary data, then maybe byte is best. From the computer's perspective they're all just types of numbers, so it doesn't make much difference in many cases.

wanton bramble Jul 2, 2020, 10:19 PM

#

thanks for responding. if i choose to store it as an int, will that binary number be converted to a base 10 number than? i'm confused as to how int would handle receiving a byte

cedar mountain Jul 2, 2020, 10:22 PM

#

For the most part, all numbers are binary in a computer. They just get converted to and from decimal when they get typed or printed. A byte is just a number that can hold a 0-255 value, whereas an int can handle negative and somewhat larger numbers too.

wanton bramble Jul 2, 2020, 10:30 PM

#

@cedar mountain ah okay I see. So if I were to print a byte I would also see a base 10 number like I would with an int? And from what I've gathered a byte is just a 8 bit number and int is a 16 bit number that includes negatives?

north stream Jul 2, 2020, 10:30 PM

#

It depends on how you print it: the Serial.print() routines take an optional argument for the base in which to print.

wanton bramble Jul 2, 2020, 10:31 PM

#

oh wow i didnt know that, ty

north stream Jul 2, 2020, 10:36 PM

#

There are a bunch of nifty features that are ... non-obvious

twilit hare Jul 3, 2020, 12:10 AM

#

So... I'm thinking of doing something either really creative, or absolutely stupid. I want to add software serial to my PyPortal (arduino) so that I can add a second TFT. There are only two exposed pins on the PyPortal.... but there are pads for SWDIO and SWCLK. I took a peek at the variant.cpp file... add it looks like there's commented out code to add those pins as GPIO. Anyone ever try this? Is it even possible, or advisable? I posted a question in the adafruit forum to track the question and answer. https://forums.adafruit.com/viewtopic.php?f=62&t=166968

Adafruit customer service forums • View topic - PyPortal: SWDIO and...

north stream Jul 3, 2020, 12:13 AM

#

I think those signals are used to load the initial software onto the board, or reload it if it gets bricked. They can also be used by debuggers. But perhaps if you don't need any of that, you might be able to use them as GPIO.

twilit hare Jul 3, 2020, 12:18 AM

#

Thanks @north stream. I don't need them for day-to-day function. I'm a little afraid that incorrectly changing the cpp will irreversibly brick the device. That being said, sometimes trying and failing is better than not trying at all...

north stream Jul 3, 2020, 12:21 AM

#

It is a bit of a nervewracking thing to do: I hacked up the memory map and pin description of one device and I was really worried I was going to ruin something. It worked fine, but it took me a bit to get ready to hit the "enter" key to load the code built with the hacked-up system.

#

The first time I did that (turning off the fuses for the master reset pin), I was nervous, but less so, because that chip had a "high voltage" programming mode where you could get its attention and reload it anyway. I suspect there's a way to put the Pyportal CPU back into an initial load mode too.

twilit hare Jul 3, 2020, 12:24 AM

#

Maybe I'll try it with an ItsyBitsyM4 first.... it's not exactly the same, but it's similar (and a lot cheaper if I break it)

north stream Jul 3, 2020, 1:31 AM

#

Good idea.

pearl fog Jul 3, 2020, 2:50 AM

#

Anyone able to spare me a moment? I have a project I'm trying to work on and I need to get the DC motor to work, but it's not working at the moment.

I need a bit of help with adjusting the code first to support a servo motor and maybe with checking the circuitry if that's okay.

📎 unknown.png

#

(is this the wrong place to send this)

cedar mountain Jul 3, 2020, 2:58 AM

#

To clarify, do you have a DC motor (brushed, just runs forward or backward when given power) or do you have a servo motor (takes a pulse-width signal to control position or velocity)?

pearl fog Jul 3, 2020, 3:02 AM

#

Sorry, I was tired, it's a DC motor

cedar mountain Jul 3, 2020, 3:04 AM

#

Okay, so how are you using the PWM output? Do you have an external H-bridge or FET or something that's driving the motor?

pearl fog Jul 3, 2020, 3:05 AM

#

Sorry, I'm slightly confused, I'm pretty new to Arduino coding so I'm unsure what you mean 😅

cedar mountain Jul 3, 2020, 3:07 AM

#

The code you shows appears to read an analog voltage from a potentiometer and use that to output a variable-duty-cycle PWM signal on pin 5. I'm trying to understand how that might translate into controlling a motor.

#

Perhaps you can ask what help you actually need?

pearl fog Jul 3, 2020, 3:10 AM

#

I'm not exactly sure how to explain it? I'm setting it up based off of a book I have for learning the basics of Arduino. First it made me make a circuit and coding for a dimmer light, then it said that after adjusting the circuit I could use the same code to make a DC motor work. (if that makes sense)

cedar mountain Jul 3, 2020, 3:11 AM

#

Gotcha. Let me explain what I think is going on, and see if that helps...

#

The analogWrite() call creates what's called a pulse-width-modulated (PWM) signal. It toggles the pin on and off really fast with a given proportion of on and off. So if you feed it to a LED, it averages out to be brighter or dimmer.

#

A DC motor will run at a given speed if you give it power (voltage). In a similar way, if you turn the motor off and on really fast with a set proportion of on and off, it'll run at faster or slower speeds, essentially averaging out the voltage.

#

However, while a LED is a low-power device, which the Arduino can light up just from one of its pins, a motor is generally higher power. So to do this, you need some extra circuitry to take the on-off signal and act as a high-power switch to control the voltage to the motor. This would be something like a transistor, or a circuit like the H-bridge that I mentioned.

pearl fog Jul 3, 2020, 3:16 AM

#

I see..

cedar mountain Jul 3, 2020, 3:17 AM

#

There are Arduino shields and boards designed to do this sort of thing, for instance.

pearl fog Jul 3, 2020, 3:18 AM

#

Since I don't understand that, and have never heard of Arduino shields (yet), I'll just state that I use an Arduino Uno for my circuitry.

cedar mountain Jul 3, 2020, 3:20 AM

#

A "shield" is a board which plugs on top of the Uno and provides additional capabilities. For instance: https://store.arduino.cc/usa/arduino-motor-shield-rev3

Arduino Motor Shield Rev3 | Arduino Official Store

The shield is based on the L298, which is a dual full-bridge driver designed to drive inductive loads such as relays, solenoids, DC and stepping motors.

pearl fog Jul 3, 2020, 3:21 AM

#

So that's what they're called... I don't have access to one at the current moment.

cedar mountain Jul 3, 2020, 3:23 AM

#

Gotcha. Well, there are potentially lots of options depending on what you have available and what you want to get working.

pearl fog Jul 3, 2020, 3:24 AM

#

Should I send a list of what I think I should be using? (or not..?)

cedar mountain Jul 3, 2020, 3:35 AM

#

Sure. Perhaps this is more appropriate for #help-with-projects , if you're looking for overall design advice rather than Arduino coding specifics.

pearl fog Jul 3, 2020, 3:35 AM

#

Alright then, thanks!

pine bramble Jul 3, 2020, 10:00 AM

#

hii, could someone help me about the esp01

#

i bought one from aliexpress and i dont know if it needs any configuration before working

pine bramble Jul 3, 2020, 11:23 AM

#

hi i am going to make a project which is when i press one of my buttons my led will turn up but when i press another button its going to close my led what ohm resistors should i use

forest hawk Jul 3, 2020, 12:12 PM

#

if you dont mind burning some leds over time, you can connect them straight into arduino, no problem

#

leds just need resistors when making big projects that are going to be turned on for a long time

candid topaz Jul 3, 2020, 12:25 PM

#

@pine bramble https://circuitdigest.com/calculators/led-resistor-calculator

LED Resistor Calculator

Use this LED resistor calculator to find out the suitable resistance for your LED circuit consisting one or more LEDs.

forest hawk Jul 3, 2020, 12:27 PM

#

nice

cobalt mirage Jul 3, 2020, 5:17 PM

#

Does anyone know a place where they sell cheap Arduino parts?

#

I don't like amazon, they are quite expensive

cedar mountain Jul 3, 2020, 5:19 PM

#

AliExpress?

weak walrus Jul 3, 2020, 5:50 PM

#

My TFT screen went white after weeks of using it 😦

#

Any ideas on what it could be? I tried swapping out the wires...

#

I don't think its a soldering issue but I dont have a multimeter

north stream Jul 3, 2020, 6:01 PM

#

anyone knows why my RGB isn't working? https://hatebin.com/zipundleat

#

For cheap Arduino parts, I look to Seeedstudio and Electronics Goldmine

#

Maybe try digitalWrite() instead of analogWrite()?

#

https://discordapp.com/channels/420594746990526466/451155251580633089/728665842304417992

#

Maybe try digitalWrite() instead of analogWrite()?
@north stream me?

#

Yes.

#

okay

#

@north stream it didn't work

weak walrus Jul 3, 2020, 6:04 PM

#

(mine was a software issue :p)

north stream Jul 3, 2020, 6:05 PM

#

and i have another qustion

#

can you tell if this RGB is common cathode or anode?

#

📎 image0.jpg

#

No, you'd need to test it to find out.

#

okay

#

and i changed it to digitalWrite and it didnt work

#

📎 unknown.png

#

@north stream do you think I should try digitalRead?

#

No, digitalWrite() is correct.

#

Okay

#

What should I do then?

#

Perhaps your LED is miswired? Does it work when hooked up by itself with current limiting resistors?

#

What do you mean

#

Have you tried just hooking the LED to power with current limiting resistors to see if it lights up?

#

i dont get what you mean

#

I see you have an LED. Have you tested it?

#

I’m using an Rgb

#

I don't understand.

#

im not using an led

#

im using an rgb

#

I'm guessing you mean an RGB LED. There are a few kinds of RGB LEDs.

#

yes

#

im using rgb led

#

Call? What call?

#

It looks like you posted a picture of it above.

#

yes

#

this is my rgb

📎 unknown.png

#

That is likely one of 4 kinds of LEDs. The most likely are 1) discrete common cathode or 2) discrete common anode. However other possibilities are addressible LEDs, 3) NeoPixel style asynchronous, or 4) DotStar style synchronous. I cannot tell by looking at a picture, the best way to find out is by looking at the data sheet (if you have a data sheet for it), or testing it (if you do not have a data sheet for it).

#

i think its a common anode

#

or common cathode

#

i dont think its any of the others

#

and most likely its anode

#

They way to find out is to measure it (if you have a meter with a diode test function) or test it with a current limiting resistor and your Arduino as a power supply (if you don't have a meter)

#

yep its anode

#

In that case, you would hook the (common) anode to the power supply (such as the 5V pin on your Arduino), then hook each cathode to an I/O pin with a current limiting resistor, and use digitalWrite() with a LOW argument to turn on that color.

#

i though HIGH is on and LOW is off

#

With a common cathode LED, you pull the (individual) anodes positive to light them. With a common anode LED (such as yours), you pull the (individual) cathodes negative to light them.

#

i dont understand what you mean

#

Different kinds of LEDs are controlled in different ways. For your LED, a low signal lights it by providing a voltage difference between the anode (which is at a positive voltage) and cathode.

#

yah

#

when i tested them on the 5 volts it worked

#

but not with gnd

#

Some LEDs are brighter than others: the brightness is controlled by the current (and duty cycle, but we're not going into that right now), and the current is controlled by the current limiting resistor.

#

its bright i just needed to fix the way of one of the resistors

#

actually my dad's going to help me

#

and thanks for trying

river osprey Jul 3, 2020, 9:06 PM

#

I'm trying to use adafruit_imagereader to display images using a bluefruit + tft gizmo. Problem is, I want to display some animations, and I need to do it frame-by-frame and a 240x240 pixel 24-bit color BMP is pretty sizable, so i don't have enough memory to store all the images. Is there a better library for displaying images that supports 4 or 8 bit bmp?

#

sadly I attempted to use arcada, but it conflicts with the TFT loading that i'm using (I am also piggy-backing off of the bluefruit example of streaming a picture from your phone via bluetooth)

#

also arcada isn't supported by the bluefruit CPX

river osprey Jul 3, 2020, 9:33 PM

#

I have imagereader 2.3.6 which seems to be the latest, but it won't load 8 or 16 color BMPs... Or at least, the ones I created from a source (24bit which loaded fine) didn't work. I used imagemagic and just set -colors 16 etc

#

magick convert swirl1240.bmp -colors 16 BMP3:swirl240_16.bmp

river osprey Jul 4, 2020, 2:37 AM

#

it really seems to be the format of the BMP. there is some setting that isn't letting it work. What confuses me the most is that the blinka BMP which is 2 bit color, works fine, but when I attempt to convert and rework the color space using -colors or -depth the images will not load 😦

topaz compass Jul 4, 2020, 3:15 AM

#

If it's a format issue, have you tried BMP2 or 4?

red vale Jul 4, 2020, 3:34 AM

#

Hello is anyone willing to collaborate on an arduino project message me if you are intersted

river osprey Jul 4, 2020, 4:25 AM

#

@topaz compass thanks for the suggestion, i'll give it a try, although all the example BMPs are BMP3... it's worth a shot though

plucky oracle Jul 4, 2020, 10:42 AM

#

hello please i need a software simulator for arduino with crack
help me please guys
can someone send me the software please

tidal sonnet Jul 4, 2020, 10:51 AM

#

Anyeone know how MA845X is different from MA8451?

topaz compass Jul 4, 2020, 11:32 AM

#

@plucky oracle You should not show the world you are a thief.

plucky oracle Jul 4, 2020, 11:34 AM

#

@topaz compass so buy me the professional version

stray basin Jul 4, 2020, 11:37 AM

#

Hello, having difficulty blinking an external led.

#

Trying to blink the external led simultaneously with the built-in on an ESP2866 (d1 mini) and can't figure out how to wire it so

#

I am also trying with an Arduino nano but also can't get the external led blinking. At least on the arduino The led comes and stays on. On the d1 mini I can't even get it to light uo

lone ferry Jul 4, 2020, 11:40 AM

#

@stray basin Can you share the code?

stray basin Jul 4, 2020, 11:40 AM

#

tried like this https://www.arduino.cc/en/uploads/Tutorial/ExampleCircuit_bb.png

#

@lone ferry it is the blink sample code: https://www.arduino.cc/en/tutorial/blink

Arduino - Blink

Open-source electronic prototyping platform enabling users to create interactive electronic objects.

lone ferry Jul 4, 2020, 11:43 AM

#

Did you use the exact same code?

stray basin Jul 4, 2020, 11:43 AM

#

yeah

#

I can see the built in led blinking but my external one is staying lit

lone ferry Jul 4, 2020, 11:48 AM

#

Are you sure you hooked it up to pin 13?

stray basin Jul 4, 2020, 11:52 AM

#

Oops I was off by one pin it was going to 3v instead. Thanks!

#

Now I can't figure out why the same doesn't work for the ESP d1 mini.

#

Should be similar wiring?

#

https://community.blynk.cc/uploads/default/optimized/2X/f/f892951d2d26e772ba5145a2419f8450cd64f06d_2_690x470.PNG

lone ferry Jul 4, 2020, 11:53 AM

#

You may have the LED the wrong way around there?

#

If you're using the same breadboard, notice that in the ESP schematic the resistor is after the LED and in the Arduino schematic it's before.

#

This doesn't really matter, but it may be causing you to have the wires switched.

stray basin Jul 4, 2020, 12:06 PM

#

Thanks again, I had a closer look and my header pins were not soldered completely on the d1 mini. The only thing is on the d1 mini the external led is opposite it turns on when the built in one turns off.

stray basin Jul 4, 2020, 12:42 PM

#

Working now, wired the cathode to d4 and the anode to 3v

north stream Jul 4, 2020, 5:39 PM

#

\

#

📎 unknown.png

#

You may need pull-up resistors.

#

@north stream how do i put it?

#

from where to where

#

Hook a 4.7kΩ resistor from SCL to +5V and another 4.7kΩ resistor from SDA to +5V.

#

do i use a wire to connect the resistor?

#

I don't know anything about your setup, so I can't say. A wire isn't strictly required, but you may need one depending on how you've connected things.

#

then isn't soldering it the best way?

#

or what do you think is the best way?

#

Hook a 4.7kΩ resistor from SCL to +5V and another 4.7kΩ resistor from SDA to +5V.
@north stream and isn't VCC for +5V?

#

The best way depends on what you have (like if you have a breadboard between the Arduino and display or not, etc.)

#

And Vcc is generally 5V for an Arduino, yes. I think the pin is marked "5V", which is why I used that term, but boards vary and my memory isn't perfect.

#

i dont understand what you mean

#

You said "and isn't VCC for +5V?", I was just replying to that.

#

I'm using Arduino Uno

#

Hello, I'm trying to use my I2C LCD. I connected it from the following link https://www.makerguides.com/character-i2c-lcd-arduino-tutorial/ I then ran the address scanner code from the same link. I fortunately I keep getting:
Scanning...
No I2C devices found. Any suggestions?

Makerguides.com

Benne de Bakker

Character I2C LCD with Arduino Tutorial (8 Examples)

In this tutorial you will learn how to control a 16x2 or 20x4 I2C character LCD with Arduino. Wiring diagram and many example codes included!

#

📎 unknown.png

north stream Jul 4, 2020, 6:59 PM

#

can someone please help me?

odd fjord Jul 4, 2020, 7:10 PM

#

@north stream how did you make the connections -- can you post a picture showing the wiriing?

north stream Jul 4, 2020, 7:10 PM

#

@north stream how did you make the connections -- can you post a picture showing the wiriing?
@odd fjord can you call cause thats my only way to use camera?

odd fjord Jul 4, 2020, 7:11 PM

#

sorry -- I'm not interested in calling -- be happy to help via chat.

north stream Jul 4, 2020, 7:12 PM

#

were is that @odd fjord

odd fjord Jul 4, 2020, 7:12 PM

#

this channel, I meant

north stream Jul 4, 2020, 7:13 PM

#

and how am i supposed to show you the wiring?

odd fjord Jul 4, 2020, 7:13 PM

#

Sorry -- that is not my problem 😉 how did you make the connections?

north stream Jul 4, 2020, 7:14 PM

#

gnd = gnd

#

vcc = 5v

#

sda = a4

#

scl = a5

#

and that's all @odd fjord

odd fjord Jul 4, 2020, 7:16 PM

#

does the LCD board have header pins? did you use jumper cables?

north stream Jul 4, 2020, 7:16 PM

#

what do you mean?

odd fjord Jul 4, 2020, 7:17 PM

#

what did you use to connect them?

north stream Jul 4, 2020, 7:17 PM

#

wires

odd fjord Jul 4, 2020, 7:18 PM

#

so you stripped insulation from the wires and put them in the headers on the UNO? How are they connected to the LCD?

north stream Jul 4, 2020, 7:18 PM

#

📎 image0.jpg

#

📎 image0.jpg

#

so you stripped insulation from the wires and put them in the headers on the UNO? How are they connected to the LCD?
@odd fjord you can see the photos

odd fjord Jul 4, 2020, 7:19 PM

#

yes -- looking at them

north stream Jul 4, 2020, 7:19 PM

#

okay

odd fjord Jul 4, 2020, 7:21 PM

#

I don't see anything wrong

north stream Jul 4, 2020, 7:22 PM

#

Those pins at the far end of the daughterboard look like they might be touching each other (they probably shouldn't), and there's something sticking out from under the LCD board (meaning it might be physically damaged)

#

idk whats the problem

#

It's also possible that the daughterboard doesn't include I2C pull-up resistors.

#

okay

#

so whats the solution?

#

First, try bending those pins so they don't touch each other.

#

Okay

#

📎 image0.jpg

#

is this the thing you mean is sticking out @north stream?

#

First, try bending those pins so they don't touch each other.
@north stream which pins?

#

📎 image0.jpg

#

the yellow wires?

proper tree Jul 4, 2020, 7:27 PM

#

the 2 on the black board, furthest from the connectors?

north stream Jul 4, 2020, 7:28 PM

#

the 2 on the black board, furthest from the connectors?
@proper tree me?

#

i have no 2 black wires

proper tree Jul 4, 2020, 7:28 PM

#

the black board

north stream Jul 4, 2020, 7:28 PM

#

what board?

proper tree Jul 4, 2020, 7:30 PM

#

📎 image0.jpg

north stream Jul 4, 2020, 7:30 PM

#

okay

trail garden Jul 4, 2020, 7:56 PM

#

i started getting this kind of error












../Documents/Arduino/libraries/Adafruit_Keypad/Adafruit_Keypad_Ringbuffer.h:57:5: note: type 'struct Adafruit_Keypad_Ringbuffer' should match type 'struct Adafruit_Keypad_Ringbuffer'
     Adafruit_Keypad_Ringbuffer;
     ^
Sketch uses 7150 bytes (24%) of program storage space. Maximum is 28672 bytes.
Global variables use 338 bytes (13%) of dynamic memory, leaving 2222 bytes for local variables. Maximum is 2560 bytes.

am i missing something, using Adafruit_Keypad.h and Keyboard.h - at started having this error, does not even work with example keypad_test file

sonic plank Jul 4, 2020, 8:48 PM

#

Anyone know about a tutorial for making 10k potentiometer reading into custums values?

#

Onto a lcd, also need help to do a /if 2 values are equal make a light turn on in a if command type

north stream Jul 4, 2020, 8:56 PM

#

There's a nice tutorial here https://learn.adafruit.com/adafruit-arduino-lesson-8-analog-inputs/variable-resistors-pots

Adafruit Learning System

Arduino Lesson 8. Analog Inputs

Learn Arduino, Lesson 8. Analog Inputs

north stream Jul 4, 2020, 9:25 PM

#

anyone knows why my buzzer isnt working?

#

code

#

https://hatebin.com/bcwrerjfmn

#

Try having a single loop that alternates the pin between 1 and 0: the current code sets it to 1 a thousand times then sets it to 0 a thousand times. What you want to do is go back and forth.

#

yes

#

https://www.udemy.com/course/learn-arduino-making-projects/learn/lecture/17699228#overview

#

like this

#

Try having a single loop that alternates the pin between 1 and 0: the current code sets it to 1 a thousand times then sets it to 0 a thousand times. What you want to do is go back and forth.
@north stream what do you mean?

#

?

#

Anyone knows why my buzzer isn’t working?

#

Code

#

https://hatebin.com/bcwrerjfmn

sonic plank Jul 4, 2020, 9:41 PM

#

Have you testet if the buzzer works?

north stream Jul 4, 2020, 9:42 PM

#

@sonic plank no

#

should i test it?

sonic plank Jul 4, 2020, 9:44 PM

#

Yes, could be defect buzzer

#

Make an easy high low program

north stream Jul 4, 2020, 9:45 PM

#

sorry

sonic plank Jul 4, 2020, 9:45 PM

#

What?

north stream Jul 4, 2020, 9:46 PM

#

actually whatever

#

what do i do

fringe stag Jul 4, 2020, 11:01 PM

#

Hello I have an Adafruit Trinket M0 that I'd like to use as a keyboard, does anyone know which keyboard library works for this? Is the Adafruit Pro Trinket library the one? Thank you!

north stream Jul 5, 2020, 2:06 AM

#

@north stream something like ```arduino
void loop() {
digitalWrite(buzzerpin, HIGH);
delay(1);
digitalWrite(buzzerpin, LOW);
delay(1);
}

#

@north stream okau

#

and anyway it worked

#

but still, thanks

undone harbor Jul 5, 2020, 5:58 AM

#

By chance does anyone know if there exist a HAT or board which pairs the pins from the Feather to an Arduino HAT pins?

opal ivy Jul 5, 2020, 9:21 AM

#

If a new sensor/module comes in for arduino/raspberry pi how does one knows how to write code for it?

odd fjord Jul 5, 2020, 9:29 AM

#

@opal ivy There is usually an accompanying library with examples and a guide.

opal ivy Jul 5, 2020, 10:43 AM

#

@odd fjord where can I usually find that?

odd fjord Jul 5, 2020, 10:45 AM

#

for Adafruit products it would be in the Learning guides. https://learn.adafruit.com -- what sensor are looking for?

#

otherwise in Arduino, you can use the library manager to see if you can find a library for the sensor then after installing it, see if it has examples....

opal ivy Jul 5, 2020, 10:49 AM

#

Thank you @odd fjord

north stream Jul 5, 2020, 12:09 PM

#

@undone harbor yes https://hackaday.io/project/169154-feather-r3-adapter

undone harbor Jul 5, 2020, 2:50 PM

#

@undone harbor yes https://hackaday.io/project/169154-feather-r3-adapter
@north stream That is exactly what I am in search of, Much Thanks... so am I correct that I can download the 2 PCB files and have them made on my own or do I have to pay for the files?

north stream Jul 5, 2020, 2:52 PM

#

I think you can just download them and get them fabricated. Or check the usual PCB vendors and see if someone already offers it as a project you can buy.

undone harbor Jul 5, 2020, 3:10 PM

#

ok thanks again

thorn relic Jul 5, 2020, 6:14 PM

#

why is it people always use const int to define static things like pins instead of just using #define

#

ah I see, because define has global scope

lone ferry Jul 5, 2020, 6:23 PM

#

And const int is less error-prone, plus it makes things easier for the compiler to reason about.

thorn relic Jul 5, 2020, 6:23 PM

#

how is it less error prone?

lone ferry Jul 5, 2020, 6:26 PM

#

You can write wrong things in a #define . For example #define min(a, b) a < b ? a : b. This looks correct but it can break.

#

And this creates subtle errors in your code that can be hard to find.

#

Or something like #define X 123;

sturdy bobcat Jul 5, 2020, 8:39 PM

#

The #define dates back to the first version of C. const int happened much much later, when compilers didn't need to fit into 64k of RAM.

open wave Jul 5, 2020, 9:24 PM

#

hi guys. i have some problems with my relay. i am using the sample LED code just in case but the relay does not work here are some pics of my connections

#

📎 image0.jpg

#

if you need more pics pls just tell me

#

when i try and short those wires

#

📎 image0.jpg

#

my fan turns on

#

the fan that is connected to the relay

#

when i put an LED on pin 13 it turns on

#

i tried on another relay but still did not work

cedar mountain Jul 5, 2020, 9:28 PM

#

Relays generally require a decent amount of current to energize their coils, possibly more than the Arduino can supply with a GPIO pin. Do you have a spec for the relay you're using?

open wave Jul 5, 2020, 9:29 PM

#

one sec

#

📎 image0.jpg

#

there

cedar mountain Jul 5, 2020, 9:34 PM

#

That specifies a coil power of 0.36/0.45W, which at 5V would be 72/90mA. An Arduino pin is usually 40mA max, so it couldn't directly drive the relay. It looks like there may be some extra circuitry on the relay board, possibly some helper transistors or something, though, so I'm not sure whether it's designed for logic-level inputs.

open wave Jul 5, 2020, 9:34 PM

#

so wut should i do

#

connect an external power source for the 5v pin??

#

from a year i think i used my other relay

#

tried connecting that today but still did not work

#

lemme see specs for other relay

cedar mountain Jul 5, 2020, 9:37 PM

#

Personally my next step would be to consult the documentation for the relay board you have to see what it expects as input. But that's my sort of approach... you may be more of a "try something and see" person, heh heh.

open wave Jul 5, 2020, 9:37 PM

#

yeah lol

#

i do not know how to find it lol

#

the documentation

#

and the relay is from a year

#

so

#

yeah

#

lol

rancid zinc Jul 5, 2020, 10:12 PM

#

I have a 3.3v compatible arduino, and i need to shift the digital outputs to 5 volt, but also shift the inputs down to 3.3v, im gonna use it for controlling synthesizers so there could be long cables, would this schematic work?

#

📎 isgood_.png

north stream Jul 6, 2020, 3:14 AM

#

The diodes will have a lot of drop, and won't let the 5V signal drive the inputs low, nor let the 3.3V signals drive the 5V signals low.

rancid zinc Jul 6, 2020, 12:39 PM

#

Ok, thx, any suggestions how to do it?

north stream Jul 6, 2020, 1:27 PM

#

I think you only need one converter, but you'll have to figure out when you're sending and when you're receiving, and use that to control the DIR pin.

pine bramble Jul 6, 2020, 8:40 PM

#

anyone avail to help me make a circuit to switch 7 diffrent steppers frmo one button push. ?(so i can use one stepper chip to chose which motor to run ?

#

anyone on here good with circut design ? i need a circut that when you press a button for a period of time that it selects one of 7 sets of plugs ( 4 wires only 2 need switched as a pair on the plug.. one input 7 possible outputs. for each 1 second button pressed it selects each plug ( first one is one second second one is 2 seconds etc ( adjustable would be nice for speed later) button is just a momentary swittch like an endstop
and an led on each position to show which is being selected and also one to light while button is pressed.. .... whats teh easiest way to make this. .? i knwo how to make a rotary switch to do this but i want a little pcb board to do this in the end..... its for a 3d printing project for a printer mod

strange grove Jul 6, 2020, 10:45 PM

#

I have a 3V UART signal from my Oxygen sensor.

I tried hooking up to an available UART pin (Serial 1/2/3) on the Adafruit Grand Central Beta board but I am not getting the right message on my serial monitor (Serial 0).

What’s interesting is that, it worked when I used the same code for Arduino MEGA2560 but level shifting the 3V output of the Oxygen sensor to 5V before connecting to the MEGA.

What’s wrong with Adafruit Grand Central not reading the serial data?

robust flint Jul 6, 2020, 11:22 PM

#

um...i am new to coding

#

can i ask a question about my Arduino code here?

#

just would like some help fixing it

stuck coral Jul 6, 2020, 11:23 PM

#

Just post the question, no need to ask

robust flint Jul 6, 2020, 11:23 PM

#

can i post images of the code?

#

sorry i just joined the server and am not aware of the rules

#

is why

stuck coral Jul 6, 2020, 11:24 PM

#

Post either a pastebin or format it correctly in discord

#

As an example... use three `s

robust flint Jul 6, 2020, 11:32 PM

#

hi, the main idea of my code is to get the time duration taken for the robot to move from point A and get to an obstacle placed in point B( sensor input would prompt obstacle avoidance) and then to turn to another row of grass and move that same distance...the idea here is to make the time duration flexible so that it can be used on a variety of fields, i saw some code online where they used the "millis" command to do something slightly similar but i am not a coding expert(this is the first code i have ever written at all). i definitely did something wrong because i am getting error "duration was not declared in this scope" . i think i coded it so that the millis at the start in point A the millis at the end of when it reaches point B would be minused so that the time taken to make the journey would be recorded but i am getting errors so i would like for someone who knows how to code to help me out.

stuck coral Jul 6, 2020, 11:33 PM

#

Please either format it correctly, or create a pastebin https://paste.ubuntu.com/

#

I would delete that

robust flint Jul 6, 2020, 11:34 PM

#

sorry

stuck coral Jul 6, 2020, 11:35 PM

#

Its alright

robust flint Jul 6, 2020, 11:40 PM

#

so i should send a link right?

stuck coral Jul 6, 2020, 11:40 PM

#

Yes

robust flint Jul 6, 2020, 11:40 PM

#

ok then

#

https://paste.ubuntu.com/p/3jTQ7xyGw3/

#

is that good?

stuck coral Jul 6, 2020, 11:41 PM

#

Yes, so your duration issue is because you are trying to use duration, but it is not in the scope. If you declare it within setup(), then no function outside of setup() can use it

#

So you should make it a global variable in this case

#

That way loop() can access it

robust flint Jul 6, 2020, 11:42 PM

#

im sorry i dont understand

#

oh ok

#

how do i make it global?

stuck coral Jul 6, 2020, 11:43 PM

#

You did it with in1, in2, in3, and in4

robust flint Jul 6, 2020, 11:44 PM

#

thats the problem..i did that too but then it will ask for "timeend" and "timebegin" to be declared too i think

#

and if i do that will they have the millis values i want them to have?

stuck coral Jul 6, 2020, 11:45 PM

#

Those will also need to be global if you organize your code that way, and if you set a global value in one function, it will be that value from any other function

robust flint Jul 6, 2020, 11:47 PM

#

do you understand what i am trying to do though? with the duration and the millis thing

#

i wanted to ask if you know a better way to do it

stuck coral Jul 6, 2020, 11:48 PM

#

I think so, looks like you could learn some code organization

#

And I see you're not using timebegin and timeend in loop(), you dont need to make those global, and to save you a byte of memory or two you dont need to delcare timeend you can - unsigned long duration = millis() - timebegin;

robust flint Jul 6, 2020, 11:52 PM

#

forgive me if i am a bit slow to understand

#

ok but....if i change line 36 to your suggestion and remove line 35 and make duration a global variable ....is this "unsigned long duration = millis() - timebegin" what i should declare it to be?

stuck coral Jul 6, 2020, 11:56 PM

#

You would declare duration around your in variables outside of all the functions, then change 36 to be duration = millis() - timebegin;

robust flint Jul 7, 2020, 12:01 AM

#

ok please tell me exactly how you would declare duration globally...i mean what you would type

#

i just now reasoned that since there are no instructions before line 23 i could just make duration= millis() but i want the time value to be exactly at the end of line 33, with that being said i dont know if declaring duration to be millis() globally would alter this value

cedar mountain Jul 7, 2020, 12:10 AM

#

The value of the time will be captured at the point the line is reached and the millis() function is called.

stuck coral Jul 7, 2020, 12:11 AM

#

just unsigned long duration;, you can then set it anywhere in code.

#

Maybe give it a default value unsigned long duration = 0;

robust flint Jul 7, 2020, 12:17 AM

#

The value of the time will be captured at the point the line is reached and the millis() function is called.
@cedar mountain just to clarify...this means i am safe to declare duration = millis() globally right?

#

sorry for the tag

stuck coral Jul 7, 2020, 12:17 AM

#

No

robust flint Jul 7, 2020, 12:17 AM

#

@stuck coral thank you....sorry for the tag

cedar mountain Jul 7, 2020, 12:17 AM

#

If you do that, its value will be whatever millis() returns at the start of the program.

stuck coral Jul 7, 2020, 12:18 AM

#

Even then, wont the timer not be initalized yet @cedar mountain?

#

I thought you cant use millis() before the function before setup is called

cedar mountain Jul 7, 2020, 12:19 AM

#

That's a good point, thank you. Yeah, it's a bad idea for several reasons.

robust flint Jul 7, 2020, 12:19 AM

#

.....

stuck coral Jul 7, 2020, 12:20 AM

#

Just declare duration next to your in variables, and on line 36 set it to millis like how you are now just to get rid of the compiler error

robust flint Jul 7, 2020, 12:20 AM

#

i should declare it to 0?

#

unsigned long duration = 0;

#

next to my variables

stuck coral Jul 7, 2020, 12:31 AM

#

Sure, then you know its value from the start

obtuse spruce Jul 7, 2020, 5:01 AM

#

Long shot - but anyone here ever try to do what CircuitPython does, and present the onboard SPI flash as a USB drive, while at the same time reading files off of it?

stuck coral Jul 7, 2020, 5:24 AM

#

Well CP is interpreted @obtuse spruce , running a compiled applciation from flash would require overwriting progmem unless the issue with QSPI code execution was fixed

#

CP interpres the file from the flash, with the actual executable in progmem along with the UF2 bootloader.

#

Oh I misread that

#

I think

#

Do you mean to run code, or just file storage?

obtuse spruce Jul 7, 2020, 5:54 AM

#

I'm not being clear: I'm coding in C++ - and I'm trying to have my device do the same technique that CircuitPython does w.r.t. to files.

#

I want to allow the user to plug the Feather M0 Express into a computer and just drag files over to it. Then my app on the device will read those files and do something with them (so, for example, use those as input to a music generation program)

#

But I'm only asking about the interesting arrangement of using both the MSC support from TinyUSB and the SDFat support -- both at the same time using the Express' on-board SPI flash chip.

#

CircuitPython achieves this... and I have it somewhat working... but there are problems in my version.

stuck coral Jul 7, 2020, 5:58 AM

#

Ah, I have not seen that, I imagine the issue is the seperation of your code reading from storage to say make music vs the USB FS.

obtuse spruce Jul 7, 2020, 5:59 AM

#

Well, the issue is that if I write a file larger than 64k, then the file as stored in the on-board flash is corrupted.

stuck coral Jul 7, 2020, 5:59 AM

#

Well it should never be written to program memory, only a RAM buffer before being written to the QSPI flash

obtuse spruce Jul 7, 2020, 6:00 AM

#

I can't tell if this is a problem with SDFat's FAT12 support, or a race condition between MSC and SDFat...

#

yes - program memory isn't involved here at all

stuck coral Jul 7, 2020, 6:00 AM

#

I have had many issues with SDFat FAT12, but I couldnt really tell you without digging in and Im going to sleep soon

obtuse spruce Jul 7, 2020, 6:00 AM

#

on-board = on the Feather board, no the on-microncontroller

stuck coral Jul 7, 2020, 6:01 AM

#

Ah, got it.

#

How big are the pages on the flash?

obtuse spruce Jul 7, 2020, 6:01 AM

#

I think 256...

#

But, Adafruit_SPIFlash has support for SDFat - and handles the mis-match in page size

stuck coral Jul 7, 2020, 6:03 AM

#

I was thinking about the write operations, because 64K is ringing a bell in my head with those flash ICs

obtuse spruce Jul 7, 2020, 6:03 AM

#

Hmmmm... okay... good to know

stuck coral Jul 7, 2020, 6:05 AM

#

Blocks are 64K

obtuse spruce Jul 7, 2020, 6:05 AM

#

well, I'm heading to bed too - so if something pops into your brain... I'm generally logged in here.

stuck coral Jul 7, 2020, 6:07 AM

#

I gotta go to sleep, but I would read the datasheet for the IC concenring blocks, they are 64K long and when I was making a OTAU bootloader I remember something about not being able to write to two blocks at the same time in an operation, or they need to be erased before hand, something like that

#

I would find it quite a conquendense it picks 64K as a number for a race condition or memory issue

umbral wasp Jul 7, 2020, 8:43 AM

#

hi, I'm trying to display a logo (8px * 10px) as well as a centered text (30px) except that the text is only displayed on a plate (I have 5 plates of 8 * 8)

#

📎 image0.jpg

#

or sometime text no appear

north stream Jul 7, 2020, 12:47 PM

#

Seems like an addressing or timing problem, but we'd need to know more about your setup to offer specific advice.

sterile niche Jul 7, 2020, 2:09 PM

#

hey, do you think I buy a kit from the website?

open wave Jul 7, 2020, 5:08 PM

#

can i run a LED strip that has 60 leds with a 5v 4amp power brick

cedar mountain Jul 7, 2020, 5:12 PM

#

The typical NeoPixel is 60mA at full brightness, so 60 of them would be 3.6A maximum. You should be good if it's that kind of strip.

open wave Jul 7, 2020, 5:12 PM

#

ok
it is
thanks

obtuse spruce Jul 7, 2020, 6:34 PM

#

Well - this has been a very interesting few hours of debugging......

#

SO - I'm getting spurious data errors reading the flash chip on a Feather M0 Express

#

as in out of about 200k of data read, I see between 0 and 10 or so read errors - that is, the wrong data is read back.

#

I think it is always a 1 read back as a 0

#

resetting my program and reading the blocks a second time results in errors in different blocks - so I'm pretty sure that the data is written to the flash correctly - just not being read right all the time

stuck coral Jul 7, 2020, 6:41 PM

#

Are you using SDFat to do this read test or are you reading directly?

obtuse spruce Jul 7, 2020, 6:42 PM

#

reading directly using Adafruit_SPIFlash::readBuffer -- for this test I've cut out the SDFat code and the MSC code

#

and reading just 512 byte blocks

#

(which is what MSC would do - hence that size)

stuck coral Jul 7, 2020, 6:43 PM

#

Hm, sounds like you're about to find something quite interesting.

obtuse spruce Jul 7, 2020, 6:44 PM

#

Perhaps.... 😫

stuck coral Jul 7, 2020, 6:47 PM

#

I feel you're pain. So you're writing 200K of a specific byte then reading it back?

cedar mountain Jul 7, 2020, 6:55 PM

#

Any chance the SPI clock phase is wrong? You might be getting bits on the edge of a transition.

obtuse spruce Jul 7, 2020, 6:59 PM

#

well... this is just the SPI flash chip that is part of the Feather M0 Express board.... and using the standard Adafruit SPIFlash library.... so, er... assuming that SPI clock phase and other particulars is correct....

#

I'm writing 512 blocks with a fixed "magic" header and a pseudo random sequence - so that I can test that the data came back the same - and have a good "random" distribution of bits, and word patterns.....

#

The magic header just identifies these blocks from any other data on the flash chip

snow pier Jul 7, 2020, 7:00 PM

#

Someone made experiences with the at-09 ble module?

obtuse spruce Jul 7, 2020, 7:01 PM

#

I'm about to write a small self contained sketch to demonstrate the issue... and I'm off in search of some other M0 Expresses I might have lying around to see if it just this board (which I is like brand spanking new...)

stuck coral Jul 7, 2020, 7:04 PM

#

Yep, if you can recreate on another board, it is a library issue, and I have been having data corruption issues eevry once in a while with a M0 board + SPI flash w/ SDFat so Im interested if you figure it out.

#

Does changing the SPI clock phase do anything as ed recommended?

obtuse spruce Jul 7, 2020, 7:25 PM

#

Well - SPI clock phase is something deep in the library, no? I wasn't planning on diving in that far ... yet ....

stuck coral Jul 7, 2020, 7:26 PM

#

Okay, well in src/spi/Adafruit_FlashTransport_SPI.cpp you can set SPISettings in the top functions just to save you a tiny bit of digging

#

Line 46 you can set a phase

obtuse spruce Jul 7, 2020, 7:29 PM

#

okay - I'll do that after I have my "minimal" tester sketch written.... currently I have stuff splatted all over my main project's code with tons of things #if 0'd out

open wave Jul 7, 2020, 8:29 PM

#

i know i am stupid
i plugged in a 19v 6.3a power brick into my arduino uno and i saw a tiny flame somewhere and the arduino is dead

#

is that supposed to happen

thorn relic Jul 7, 2020, 8:31 PM

#

Its probably just the LDO regulator. It will probably still power off USB or 5V directly

#

Ive also done this 😁

open wave Jul 7, 2020, 8:31 PM

#

lul

#

ok

thorn relic Jul 7, 2020, 8:33 PM

#

makes a nice repair project if you grab some replacement AMS1117v5 which is probably whats got a nice hole in it

south pulsar Jul 7, 2020, 8:39 PM

#

when i plug my computer into my arduino nano (via usb) then COM3 (the port im using) only shows up in the device manager for a half second, and then disappears right after

open wave Jul 7, 2020, 8:44 PM

#

wut programmer for arduino uno

north stream Jul 7, 2020, 8:45 PM

#

Normally the Arduino Uno has its own bootloader to program it, so you don't usually need a separate programmer. Or are you asking about the development environment?

open wave Jul 7, 2020, 8:47 PM

#

in tools>programmer

#

do i do burn bootloader

obtuse spruce Jul 7, 2020, 8:57 PM

#

Okay - current status: Seems that this whole flash issue is just this one Feather M0 Express board... The other one I have verifies data perfectly every time.

north stream Jul 7, 2020, 8:59 PM

#

Normally the Arduino comes with a bootloader, so you don't need to burn one. If you do need to burn a bootloader, I think you'd need an "ISP" programmer, but there is a way to use a second Arduino to do that.

stuck coral Jul 7, 2020, 9:00 PM

#

Well ig thats good @obtuse spruce, do you still run into the first issue you were having?

open wave Jul 7, 2020, 9:00 PM

#

@north stream so wut do i do now

obtuse spruce Jul 7, 2020, 9:00 PM

#

No - everything is explained by this: reading from this flash chip gives a very low, but consistent set of bit errors - always a 1 read as a 0

south pulsar Jul 7, 2020, 9:01 PM

#

wire is just weird

#

i just had to bend it a certain way to get it to work

obtuse spruce Jul 7, 2020, 9:02 PM

#

@stuck coral --- you mean this line: _setting = SPISettings(clock_hz, MSBFIRST, SPI_MODE0);

#

I don't see a phase parameter there

stuck coral Jul 7, 2020, 9:03 PM

#

SPI_MODE0 sets a clock phase and another setting

obtuse spruce Jul 7, 2020, 9:05 PM

#

oh - I see MODE0, 1, 2, 3 (amusingly, set to values 2, 0, 3, and 1!!!)

#

but SPI.h gives no clue about phase

stuck coral Jul 7, 2020, 9:05 PM

#

https://en.wikipedia.org/wiki/Serial_Peripheral_Interface#Clock_polarity_and_phase

Serial Peripheral Interface

The Serial Peripheral Interface (SPI) is a synchronous serial communication interface specification used for short-distance communication, primarily in embedded systems. The interface was developed by Motorola in the mid-1980s and has become a de facto standard. Typical applic...

#

Too bad they dont explain in comments

obtuse spruce Jul 7, 2020, 9:12 PM

#

okay -but given that the library from Adafruit uses Mode0 - and that works on another board - and it mostly works on this board ---- is there a reason to expect that changing the phase will improve things?

#

I'd assume that if the phase was wrong - everything would be broken

stuck coral Jul 7, 2020, 9:14 PM

#

Not always, sometimes if you see a few rando bitflips then it can be. I had this issue with a high speed ADC last week.

#

But it seems to be a board issue in your case ig

proper tree Jul 7, 2020, 9:26 PM

#

Super Goku!!!!! The Smoke and Fire are what make electronics run!!!!! You cant just let them out!!!!

cedar flume Jul 7, 2020, 11:01 PM

#

I want to controll an LED Strip with Arduino.
I have seen 5V and 12V Strips.
Are the 12V have brighter light or what is the difference?

north stream Jul 7, 2020, 11:46 PM

#

Basically the 12V ones have more voltage headroom (so you don't need to work as hard to power long ones) but they're less efficient.

halcyon cloud Jul 8, 2020, 2:14 AM

#

how to use tiny go with arduino on mac and tutorials

stuck coral Jul 8, 2020, 2:16 AM

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If you are using tinygo you should look at their website https://tinygo.org/usage/basic/ although note this channel is more centered around the arduino framework which is not used with tinygo, however it obviosuly supports some arduino boards

Basic command examples :: TinyGo - Go on Microcontrollers and WASM

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Everything you need should be there, inclduing setup on a mac https://tinygo.org/getting-started/macos/

macOS :: TinyGo - Go on Microcontrollers and WASM

sterile niche Jul 8, 2020, 3:56 AM

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hey, do you think I buy a kit from the website?

snow pier Jul 8, 2020, 9:49 AM

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Ive got a problem with the AT-09 BLE module. (Its a HM-10 fake)

I dont get response when i send AT-commands over the serial monitor.
When i write the commands into the code, it works, more or less.
I can change the name and the role but i cant set a password.
Any suggestions?

obtuse spruce Jul 8, 2020, 4:04 PM

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@stuck coral - thought you'd want to know - reducing the SPI clock rate by a factor of 4 (from 48MHz to 12MHz) - results in zero errors. And this was reading data written to the flash at the original high rate.

stuck coral Jul 8, 2020, 4:06 PM

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Hm, does changing the phase do anything at all at the origonal speed to help? Becuase that would be another sign of a potential phase issue, as there is more time for rising and settling.

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But very interesting, thank you

obtuse spruce Jul 8, 2020, 4:13 PM

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I'd have to go modify the guts of the library to test that.... perhaps later I'll try that... but for now..... Onward!

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And now that my "multi-flash" flash station project works - I think I'll try to show that on show-n-tell tonight.... seems like a useful thing people might want.

stuck coral Jul 8, 2020, 10:13 PM

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Awesome! Lol, kinda fell asleep there 😬

slim cloak Jul 8, 2020, 10:48 PM

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Trying to download Arcadia library for the Clue and it says there are dependencies missing. I'm lost. Seems like its missing basic libraries. Have the lastest IDE. Is there anything that goes before this? Working off the guide. The clue itself is working and download the blink program successfully.

stuck coral Jul 8, 2020, 10:49 PM

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What is your compiler error?

slim cloak Jul 8, 2020, 10:50 PM

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No error just setting up the libraries as the guide say. Arcadia will not install.

stuck coral Jul 8, 2020, 10:51 PM

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Well without an error message of any kind its hard for me to help

slim cloak Jul 8, 2020, 10:54 PM

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Just the setup. it's a new laptop. Downloaded the IDE and loaded some drivers. It gave me list of dependencies that were not installed. It seems like a basic list of functional libraries.

stuck coral Jul 8, 2020, 10:55 PM

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When it gives you the list, what does it say? Could you give me that output? I assume you need Adafruit_GFX, Adafruit_SPITFT, and Adafruit_NeoPixel

slim cloak Jul 8, 2020, 10:55 PM

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Yes thats the list

stuck coral Jul 8, 2020, 10:57 PM

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Well go install those libraries from the library manager and report back

slim cloak Jul 8, 2020, 10:58 PM

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It's a huge list. That's why I wondered if I missed a basic download.

stuck coral Jul 8, 2020, 11:00 PM

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Again, if you could paste in the output that would be more helpful

slim cloak Jul 8, 2020, 11:12 PM

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Can't paste it. Runs off the screen. I am making headway. I see it will download other dependencies so it probably won't be so bad.

stuck coral Jul 8, 2020, 11:13 PM

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In cases like that, and when you want to place code, you can either format or make a pastebin just for future reference

slim cloak Jul 8, 2020, 11:57 PM

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Thanks IoTPanic. I was able to download what I needed and it works fine. It seems that a number of the libraries listed were already installed. The Arcadia warning went away so it must have them all. I was able to reload the sample program the Clue came with so all is good. Now to tackle circuit python.

twilit hare Jul 9, 2020, 4:03 AM

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has anyone ever successfully transferred an image to an M4+ESP32 combo over MQTT (using BASE64)? I can't find any examples.... not sure if it's possible. [Note: I can easily download images over HTTP, but really want to transfer the images over MQTT... even if that means breaking up the encoded message into parts and assembling before displaying the image]

candid topaz Jul 9, 2020, 9:41 AM

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you can send text to topic "begin" and concat base64 decoded parts to array till you get text "end"

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@twilit hare

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on "begin" clean array, on message - append to array, on "end" - display that array

stuck coral Jul 9, 2020, 11:09 AM

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@twilit hare Im not sure I agree, I would fragment the image in the M4, sending the data to the ESP32 in byte for over serial or SPI and use the ESP32 just as a network controller but thats just me.

pine bramble Jul 9, 2020, 11:45 AM

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Hi Everyone,
I got a little problem trying to make my new NeoTrellis working with Arduino. I followed step by step the guide on the website but i keep having this error popin up
Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++: no such file or directory
I updated / reinstalled / bords and librairies but nothing is changing.
Do you have any clue what to do?
Thanks 🙂

stuck coral Jul 9, 2020, 11:47 AM

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Have you installed Arduino SAMD support along with the Adafruit SAMD board package?

pine bramble Jul 9, 2020, 11:49 AM

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i did

stuck coral Jul 9, 2020, 11:50 AM

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Not sure then, maybe someone else has an idea because Im pretty sure thats the board support with the arm version of gcc

pine bramble Jul 9, 2020, 11:51 AM

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im sure as well. Maybe i can download that file and put it in the folder myself?

stuck coral Jul 9, 2020, 11:51 AM

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Would not recomend, no, unless someone here recommends it knowing something I dont

pine bramble Jul 9, 2020, 11:52 AM

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ok

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i will keep digging, thanks

candid topaz Jul 9, 2020, 12:06 PM

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@pine bramble https://github.com/eblot/homebrew-armeabi

pine bramble Jul 9, 2020, 12:07 PM

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@candid topaz i will install that and check. Thanks

candid topaz Jul 9, 2020, 12:08 PM

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or maybe this one https://github.com/ARMmbed/homebrew-formulae

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@pine bramble maybe 2nd link

pine bramble Jul 9, 2020, 12:20 PM

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ok

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it says it is already installed... i try to reinstall it in case

twilit hare Jul 9, 2020, 1:12 PM

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@candid topaz and @stuck coral Thanks for your comments. I'll play around with it more tonight (after work)

quaint dune Jul 9, 2020, 1:44 PM

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Hey there can anyone drop a link for best arduino uno beginner tutorial.I have already joined tinkerCAD

north stream Jul 9, 2020, 1:45 PM

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What's "best" depends on the person, but here's one possibility https://learn.adafruit.com/lesson-0-getting-started

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SparkFun also offers some like https://learn.sparkfun.com/tutorials/what-is-an-arduino

pine bramble Jul 9, 2020, 2:28 PM

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or maybe this one https://github.com/ARMmbed/homebrew-formulae
@candid topaz well its not working nether

GitHub

ARMmbed/homebrew-formulae

homebrew ("the missing package manager for OS X") formulae from the mbed team. - ARMmbed/homebrew-formulae

slim cloak Jul 9, 2020, 2:33 PM

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On the Clue can you load Arduino and Circuit Python setups just in case you want to switch. If I load an ardunio program for one project and decide to repurpose the clue for Circuit Python would I have to reconfigure the board. Are they mutually exclusive or can the be called as needed?

odd fjord Jul 9, 2020, 2:38 PM

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@slim cloak You can load either an Arduino sketch to the board or Circuitpython. When you load one, it replaces the other so you cant' have both at the same time but you can freely switch back and forth. Note. if you have files on the external Flash as part of CircutiPython (CIRCUITPY drive) they "should" not be impacted by load ing and Adruino sketch. If you go back to CP they should still be there. That said, I would not depend on it. Back them up first..

pine bramble Jul 9, 2020, 2:48 PM

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@candid topaz are you sure it does install on the right folder?

candid topaz Jul 9, 2020, 3:14 PM

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i installed it before yesterday i think

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for stm32

pine bramble Jul 9, 2020, 3:24 PM

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do i need to install these first? brew install arm-none-eabi-llvm
brew install armv7em-cortex-m4f

candid topaz Jul 9, 2020, 3:28 PM

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i checked my taps, i only used armmbed brew recipe

pine bramble Jul 9, 2020, 3:45 PM

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i'm confused 😟

candid topaz Jul 9, 2020, 3:49 PM

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yeah, sometimes get things working on mac is bit challenging 🙂

pine bramble Jul 9, 2020, 4:26 PM

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i guess i will delete and reinstlll all Arduino files...

north stream Jul 9, 2020, 4:58 PM

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At this point, I think that's a logical thing to try: the files you need should be part of those board sets.

upper rune Jul 9, 2020, 6:02 PM

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so i have an arduino pro mini and i am trying to control a ESC with it, i have figured out using pulseIn() that the ESC takes an input between 2000 and 4000 microseconds with the controller i have, but when using the arduino i am unable to replicate the results only getting 20% speed with 1800-2000 microseconds. does anyone know if there is a hard limit on the microseconds using the servo library and how i would overcome this?

north stream Jul 9, 2020, 6:33 PM

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I suspect the servo library is designed for ordinary RC servos that take a 1000-2000µs pulse. Presumably, you could either modify the servo library, or use PWM directly. The PWM approach gives you full control, you'd you have to set the repetition rate appropriately, and convert your pulse lengths to duty cycle.

upper rune Jul 9, 2020, 7:33 PM

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ok, ive been looking around however i cant find the cycle length of analogWrite() or the correlation between duty cycle % and microseconds?

north stream Jul 9, 2020, 7:45 PM

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The pulse width will be the repetition rate times the duty cycle. So if you have a repetition rate of 50Hz, which would be 20ms. A 10% duty cycle would be 10% of 20ms, or 2ms, which in turn is 2000µs.

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However, I think the default repetition rate for analogWrite() is much higher (a few hundred hertz, maybe?), and your ESC may not work with that. The servo library does some things to set a higher accuracy and a different repetition rate.

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It looks like you can tell the servo library to use a custom minimum and maximum pulse width: this may be an easier way to get the wider range you mentioned. https://github.com/arduino-libraries/Servo/blob/master/src/avr/Servo.cpp#L238

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I also see that the servo library interprets values less than 544 as degrees (they get multiplied out to get the microseconds), and larger values as microseconds directly.

cedar mountain Jul 9, 2020, 8:32 PM

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Ooof... I mean, I see why they do it, but invisibly overloading an API like that just sends a shiver up my spine.

upper rune Jul 9, 2020, 9:03 PM

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thanks, i got it to work with some trial and error, do you know if there is a analogWriteResolution() alternative for non due arduino's?

trim hatch Jul 9, 2020, 9:08 PM

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can someone send me the default arduiino theme

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i deleted mine by accident

upper rune Jul 9, 2020, 9:12 PM

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where are themes stored?

trim hatch Jul 9, 2020, 9:12 PM

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go to the default arduino folder

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or the folder where arduino is installed

upper rune Jul 9, 2020, 9:12 PM

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yh

trim hatch Jul 9, 2020, 9:12 PM

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then once you are there go to lib

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the lib folder

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then inside there there should be another folder called theme

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i need the theme folder

upper rune Jul 9, 2020, 9:13 PM

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📎 theme.zip

trim hatch Jul 9, 2020, 9:13 PM

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thank you

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thank you so much man

upper rune Jul 9, 2020, 9:15 PM

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dw

upper rune Jul 9, 2020, 9:41 PM

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as of right now i am using analogwrite to control an ESC but i am only using 17-33 of the 0-255 that analogwrite can do, is it possible to have 0-255 control 17-33 more precisely, since 16 steps is not very good for my usage?

cedar mountain Jul 9, 2020, 9:44 PM

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You'd probably want to use the Servo library instead, which should give more precise control.

upper rune Jul 9, 2020, 9:55 PM

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OMG, i am soo dumb! i set the proccessor in the IDE to 8MHZ instead of 16 which was messing with my pwm values.

cedar mountain Jul 9, 2020, 11:08 PM

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Ah, yeah, that'd explain it. I was wondering what kind of crazy ESC you had to want those pulse widths...

quaint dune Jul 10, 2020, 10:25 AM

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Are there any beginner projects for arduino ...... I have already done those on sensors like pir, Temperature, photoresistors etc

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📎 JPEG_20200710_155955.jpg

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Can some1 explain how does the led glow when 5V is not attached to the breadboard?

scarlet sky Jul 10, 2020, 10:51 AM

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@quaint dune When you digitalWrite "HIGH" the Arduino passes the +5v out via the pins you have connected

pine bramble Jul 10, 2020, 10:52 AM

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At this point, I think that's a logical thing to try: the files you need should be part of those board sets.
@north stream @candid topaz after a total reinstall it works. Thanks for your help 😉