// https://forum.arduino.cc/t/turn-on-peristaltic-pump-based-on-ph-reading/1143658
// https://wokwi.com/projects/379655181669026817

# define sampleRate 66   // sample every N milliseconds

// for the leaky integrator
const float alpha = 0.75;
float leakyAverage;



void setup()
{
  Serial.begin(115200);
  Serial.println("leaky integrator demo\n");
}

const int analogInPin = A0;

int temp;

unsigned long now;

void loop()
{
  now = millis();

  static unsigned long lastSampleTime;

// grab a sample only every sampleRate milliseconds
  if (now - lastSampleTime < sampleRate) return;

  lastSampleTime = now;

  int sensorValue = analogRead(analogInPin);
  float newReading = sensorValue * 5.0 / 1024;

  leakyAverage = alpha * leakyAverage + (1 - alpha) * newReading;

// goforsmoke

typedef float gfsType;
  int avgRead;
{
  const unsigned int averageOver = 10;
  static gfsType runningTotal;
  gfsType avgRead;



//  adcRead = analogRead( potPin[ potIdx ] );
  int adcRead = sensorValue;

  // subtract 1/averageOver of the total and add the read
  runningTotal -= runningTotal / averageOver + adcRead;
  avgRead = runningTotal / averageOver;
}


//  Serial.print(0.0);
  Serial.print(", ");
  Serial.print(newReading);
  Serial.print(", ");

//  Serial.print(leakyAverage);

//  Serial.print(", ");

  Serial.print(avgRead);

  Serial.print(", ");
//  Serial.print(5.0);

  Serial.println();
}

//   "serialMonitor": { "convertEol": false, "display": "plotter", "newline": "lf" },