deej-5-sliders-vanilla.ino

const int NUM_SLIDERS = 5;
const int analogInputs[NUM_SLIDERS] = {A0, A1, A2, A3, A4};

int analogSliderValues[NUM_SLIDERS];

const int JITTER = 3;
int oldSliderValues[NUM_SLIDERS];
bool changed = true; // send values first time

void setup() { 
  for (int i = 0; i < NUM_SLIDERS; i++) {
    pinMode(analogInputs[i], INPUT);
  }

  Serial.begin(9600);
}

void loop() {
  updateSliderValues();
  if (changed == true) {
    sendSliderValues(); // Actually send data (all the time)  

    //reset values
    for(int i = 0; i < NUM_SLIDERS; i++) {
      oldSliderValues[i] = analogSliderValues[i];
    }
    changed = false;
  }
  // printSliderValues(); // For debug
  delay(10);
}

void updateSliderValues() {
  for (int i = 0; i < NUM_SLIDERS; i++){
    analogSliderValues[i] = analogRead(analogInputs[i]);

    //compare for changes
    if (abs(analogSliderValues[i] - oldSliderValues[i]) > JITTER){
      changed = true;
    }
  }
}

void sendSliderValues() {
  String builtString = String("");

  for (int i = 0; i < NUM_SLIDERS; i++) {
    builtString += String((int)analogSliderValues[i]);

    if (i < NUM_SLIDERS - 1) {
      builtString += String("|");
    }
  }
  
  Serial.println(builtString);
}

void printSliderValues() {
  for (int i = 0; i < NUM_SLIDERS; i++) {
    String printedString = String("Slider #") + String(i + 1) + String(": ") + String(analogSliderValues[i]) + String(" mV");
    Serial.write(printedString.c_str());

    if (i < NUM_SLIDERS - 1) {
      Serial.write(" | ");
    } else {
      Serial.write("\n");
    }
  }
}