/*
  Forum: https://forum.arduino.cc/t/simultaneous-while-loops/1157056/15
  Wokwi: https://wokwi.com/projects/372695449762438145 
  
*/

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 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() {
  pHVal = pHMath();
  pressureVal = pressureMath();
  temperatureVal = temperatureMath();

  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);
  }
}

float pHAverage() {
  float pail;
  float promedio;
  for (int h = 1; h <= n; h++) {
    pHReading[h] = analogRead(pHAnalogPin);
    delay(12);
  }
  pail = 0;
  for (int h = 1; h <= n; h++) {
    pail = pail + pHReading[h];
  }
  promedio = pail / n;
  return promedio;
}

float pressureAverage() {
  float pail;
  float promedio;
  for (int p = 1; p <= n; p++) {
    pressureReading[p] = analogRead(pressureAnalogPin);
    delay(12);
  }
  pail = 0;
  for (int p = 1; p <= n; p++) {
    pail = pail + pressureReading[p];
  }
  promedio = pail / n;
  return promedio;
}

float temperatureAverage() {
  float pail;
  float promedio;
  for (int t = 1; t <= n; t++) {
    temperatureReading[t] = analogRead(temperatureAnalogPin);
    delay(12);
  }
  pail = 0;
  for (int t = 1; t <= n; t++) {
    pail = pail + temperatureReading[t];
  }
  promedio = pail / n;
  return promedio;
}

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

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

float temperatureMath() {
  float voltcommTemperature = temperatureAverage();
  double tempK = log(10000.0 * ((1024.0 / voltcommTemperature - 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);
  }  
}