/*
  Forum: https://forum.arduino.cc/t/simultaneous-while-loops/1157056/15
  Wokwi: https://wokwi.com/projects/372695498851525633
  
*/

int pHLowPin = 2;
int pHHighPin = 3;
int pressureLowPin = 4;
int pressureHighPin = 5;
int temperatureLowPin = 6;
int temperatureHighPin = 7;

int pHAnalogPin = A0;
int pressureAnalogPin = A1;
int temperatureAnalogPin = A2;

float pHVal;
float pressureVal;
float temperatureVal;
float pHAverage;
float pressureAverage;
float temperatureAverage;

float pHCalibration = 0.112;
float pressureCalibration = 0.00;
float temperatureCalibration = 0.00;

char n = 15;
float h;
float p;
float t;
float pHReading[15];
float pressureReading[15];
float temperatureReading[15];

void setup() {
  Serial.begin(9600);

  pinMode(pHAnalogPin, INPUT);
  pinMode(pressureAnalogPin, INPUT);
  pinMode(temperatureAnalogPin, INPUT);

  pinMode(pHLowPin, OUTPUT);
  pinMode(pHHighPin, OUTPUT);
  pinMode(pressureLowPin, OUTPUT);
  pinMode(pressureHighPin, OUTPUT);
  pinMode(temperatureLowPin, OUTPUT);
  pinMode(temperatureHighPin, OUTPUT);
}

void loop() {
  
  doMeasurements();

  imprimir();

  if (pHVal < 5) {
    digitalWrite(pHLowPin, HIGH);
  } else {
    digitalWrite(pHLowPin, LOW);
  }

  if (pHVal > 9) {
    digitalWrite(pHHighPin, HIGH);
  } else {
    digitalWrite(pHHighPin, LOW);
  }

  if (pressureVal < 30) {
    digitalWrite(pressureLowPin, HIGH);
  } else {
    digitalWrite(pressureLowPin, LOW);
  }

  if (pressureVal > 70) {
    digitalWrite(pressureHighPin, HIGH);
  } else {
    digitalWrite(pressureHighPin, LOW);
  }

  if (temperatureVal < 100) {
    digitalWrite(temperatureLowPin, HIGH);
  } else {
    digitalWrite(temperatureLowPin, LOW);
  }

  if (temperatureVal > 150) {
    digitalWrite(temperatureHighPin, HIGH);
  } else {
    digitalWrite(temperatureHighPin, LOW);
  }
}


void doMeasurements() {
  float pail;
  float promedio;
  for (int h = 1; h <= n; h++) {
    pHReading[h] = analogRead(pHAnalogPin);
    pressureReading[h] = analogRead(pressureAnalogPin);
    temperatureReading[h] = analogRead(temperatureAnalogPin);
    delay(12);
  }
  float pailpH = 0;
  float pailPr = 0;
  float pailTmp = 0;
  for (int h = 1; h <= n; h++) {
    pailpH  = pailpH + pHReading[h];
    pailPr  = pailPr + pressureReading[h];
    pailTmp = pailTmp + temperatureReading[h];
  }
  pHAverage = pailpH / n;
  pressureAverage = pailPr / n;
  temperatureAverage = pailTmp / n;
  pHVal = pHMath();
  pressureVal = pressureMath();
  temperatureVal = temperatureMath();
}



float pHMath() {
  float convertpH = ((14. / 1023.) * pHAverage);
  float pHMathd = convertpH + pHCalibration;
  return pHMathd;
}

float pressureMath() {
  float convertPressure = ((100. / 1023.) * pressureAverage);
  float pressureMathd = convertPressure + pressureCalibration;
  return pressureMathd;
}

float temperatureMath() {
  double tempK = log(10000.0 * ((1024.0 / temperatureAverage - 1)));
  tempK = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * tempK * tempK ))
               * tempK );
  float tempC = tempK - 273.15;
  float tempF = (tempC * 9.0) / 5.0 + 32.0;
  float convertTemperature = tempF;
  float temperatureMathd = convertTemperature + temperatureCalibration;
  return temperatureMathd;
}

void imprimir() {
  static unsigned long lastPrintTime = 0;
  if (millis() - lastPrintTime >= 250) {
    lastPrintTime = millis();
    Serial.print("pH = ");
    Serial.print(pHVal);
    Serial.print(".         Pressure = ");
    Serial.print(pressureVal);
    Serial.print(".         Temperature = ");
    Serial.println(temperatureVal);
  }
}