Compilation error: 'responsivePot' was not declared in this scope

dantallulah · March 13, 2024, 3:02pm

Hi! I am fairly new to Arduino. I am trying to control three potentiometers with an Arduino Micro that will output to MIDI, but I've run into a issue in the code that I can't seem to figure out. Any help would be very appreciated.

I keep getting an error message that reads, "Compilation error: 'responsivePot' was not declared in this scope".

Again, I'm new to this, but would love to learn. I've been researching the issue and can't find a solution so I figured I would reach out for pointers. Code included below:

#include "MIDIUSB.h"               // Include the MIDIUSB library for MIDI communication
#include <ResponsiveAnalogRead.h>  // Include the ResponsiveAnalogRead library from https://github.com/dxinteractive/ResponsiveAnalogRead

const int N_POTS = 3;

int potPin[N_POTS] = { A0, A1, A2};
int potCC[N_POTS] = { 4, 5, 6 };

int analogtRead[N_POTS] = { 0 };
int potState[N_POTS] = { 0 };
int potPState[N_POTS] = { 0 };

int midiState[N_POTS] = { 0 };
int midiPState[N_POTS] = { 0 };

byte potThreshold = 3;
const int POT_TIMEOUT = 300;
unsigned long pPotTime[N_POTS];
unsigned long potTimer[N_POTS];

float snapMultiplier = 0.01;
ResponsiveAnalogRead analog1(A1, true);
ResponsiveAnalogRead analog2(A2, true);
ResponsiveAnalogRead analog3(A3, true);

void setup() {

  Serial.begin(9600); // Initialize serial communication for debugging

  for (int i = 0; i < N_POTS; i++) {
    responsivePot[i] = ResonsiveAnalogRead(A0, true, snapMultiplier);
    responsivePot[i].setAnalogResolution(1023);
    responsivePot[i] = ResonsiveAnalogRead(A1, true, snapMultiplier);
    responsivePot[i].setAnalogResolution(1023);
    responsivePot[i] = ResonsiveAnalogRead(A2, true, snapMultiplier);
    responsivePot[i].setAnalogResolution(1023);
  }
}  

void loop() {

analog1.update();
analog2.update();
analaog3.update();

  for (int i =0; i < N_POTS; i++) {
    potState[i] = analogRead(potPin[i]);
    midiState[i] = map(potState[i], 0, 1023, 0, 128);
  
    int potVar = abs(potState[i] - potPState[i]);

    if (potVar > potThreshold) {
      pPotTime[i] = millis();
    }

    potTimer[i] = millis() - pPotTime[i];

   if (potTimer[i] < POT_TIMEOUT) {
      if(midiState[i] != midiPState[i]) {
        Serial.print(" Pot:");
        Serial.print(i);
        Serial.print(" | ");
        Serial.print(potState[i]);
        Serial.print(" ");
       Serial.print(" - MIDIState:");
        Serial.print(midiState[i]);
        midiPState[i] = midiState[i];
      }
      potPState[i] = potPState[i];   
   }
    Serial.print(analogOne.getValue());
    Serial.print(analogTwo.getValue());
 } 
}

UKHeliBob · March 13, 2024, 3:04pm

Welcome to the forum

The compiler is not lying. The responsivePot array is not declared in the sketch posted

Where did you get the code ?

invictus542515 · March 13, 2024, 3:23pm

Did you copy the code line by line from a tutorial? If so, you may have missed the line declaring responsivePot. Arduino IDE can't use variables that don't exist in the active sketch.

xfpd · March 13, 2024, 3:26pm

Spelling counts.

dantallulah · March 13, 2024, 3:27pm

Thank you for the fast response! Yes, I am working with a tutorial on YouTube: https://www.youtube.com/watch?v=hcm5H6f8MI8&t=599s

Example code can be found here: YouTube

I hate to ask stupid questions, but how would I declare it here? Again, very new to this.

xfpd · March 13, 2024, 3:29pm

Copy that example code... paste it here (and your IDE). If the source code is bad, do not trust the video.

Also, try an example from the ResponsiveAnalogRead library:

github.com

dxinteractive/ResponsiveAnalogRead/blob/master/examples/ResponsiveAnalogRead/ResponsiveAnalogRead.ino

// include the ResponsiveAnalogRead library
#include <ResponsiveAnalogRead.h>

// define the pin you want to use
const int ANALOG_PIN = A0;

// make a ResponsiveAnalogRead object, pass in the pin, and either true or false depending on if you want sleep enabled
// enabling sleep will cause values to take less time to stop changing and potentially stop changing more abruptly,
//   where as disabling sleep will cause values to ease into their correct position smoothly and more accurately
ResponsiveAnalogRead analog(ANALOG_PIN, true);

// the next optional argument is snapMultiplier, which is set to 0.01 by default
// you can pass it a value from 0 to 1 that controls the amount of easing
// increase this to lessen the amount of easing (such as 0.1) and make the responsive values more responsive
// but doing so may cause more noise to seep through if sleep is not enabled

void setup() {
  // begin serial so we can see analog read values through the serial monitor
  Serial.begin(9600);
}

This file has been truncated. show original

UKHeliBob · March 13, 2024, 3:31pm

The site you linked to that has the code is demanding that I enter my email address before letting me in. I will not be doing that

invictus542515 · March 13, 2024, 3:33pm

: enters email address :

4 hours later

(999999999) Inbox - email@gmail.com

alto777 · March 13, 2024, 3:34pm

I had to strip the MIDI stuff. Please peruse this (read in a thorough or careful way) to see how an array of responsive pots is declared and used:

UA Hacked your code.


#include <ResponsiveAnalogRead.h>  // Include the ResponsiveAnalogRead library from https://github.com/dxinteractive/ResponsiveAnalogRead

const int N_POTS = 3;

int potPin[N_POTS] = { A0, A1, A2};
int potCC[N_POTS] = { 4, 5, 6 };

int analogtRead[N_POTS] = { 0 };
int potState[N_POTS] = { 0 };
int potPState[N_POTS] = { 0 };

int midiState[N_POTS] = { 0 };
int midiPState[N_POTS] = { 0 };

byte potThreshold = 3;
const int POT_TIMEOUT = 300;
unsigned long pPotTime[N_POTS];
unsigned long potTimer[N_POTS];

float snapMultiplier = 0.01;

ResponsiveAnalogRead analog[3] = {
  {A1, true, snapMultiplier},
  {A2, true, snapMultiplier},
  {A3, true, snapMultiplier},
};

void setup() {

  Serial.begin(9600); // Initialize serial communication for debugging

  for (int i = 0; i < N_POTS; i++) {
    analog[i].setAnalogResolution(1023);
  }
}  

void loop() {

  for (int i = 0; i < N_POTS; i++) {
    analog[i].update();
  }

  for (int i = 0; i < N_POTS; i++) {
    potState[i] = analogRead(potPin[i]);
    midiState[i] = map(potState[i], 0, 1023, 0, 128);
  
    int potVar = abs(potState[i] - potPState[i]);

    if (potVar > potThreshold) {
      pPotTime[i] = millis();
    }

    potTimer[i] = millis() - pPotTime[i];

   if (potTimer[i] < POT_TIMEOUT) {
      if(midiState[i] != midiPState[i]) {
        Serial.print(" Pot:");
        Serial.print(i);
        Serial.print(" | ");
        Serial.print(potState[i]);
        Serial.print(" ");
        Serial.print(" - MIDIState:");
        Serial.print(midiState[i]);
        midiPState[i] = midiState[i];
      }
      potPState[i] = potPState[i];   
   }
//    Serial.print(analog[0].getValue());
//    Serial.print(analog[1].getValue());
//    Serial.print(analog[2].getValue());
 } 
}

a7

dantallulah · March 14, 2024, 12:29pm

Thank you! This really helped me move forward with my project! I appreciate your help!

alto777 · March 14, 2024, 12:48pm

Reading @alto777's code, it seems the only real use of the responsive pot thing is commented out

//    Serial.print(analog[0].getValue());
//    Serial.print(analog[1].getValue());
//    Serial.print(analog[2].getValue());

so while it does show how to declare and update the objects, it makes no direct use of whatever functionality they are meant to provide.

Also, analog was a bad name for the array, do better.

a7

dantallulah · March 14, 2024, 1:46pm

Thanks for the input. I'm learning and am trying to make the project as simple as I can, be kind.

alto777 · March 14, 2024, 1:59pm

Haha, I was criticizing myself… I said it showed how the object is used, it does not. I named the array analog, which is just a bad name.

I assume you copy/paste/edited the example code somehow, where that author called the object analog, and you made 1, 2 and 3 of it.

So I was also criticizing that person.

But kind is on my short list of things to be, cheerful another. Some days I do better than others. Thanks for the reminder.

a7

system · September 10, 2024, 2:00pm

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Compilation error: 'responsivePot' was not declared in this scope

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