/*
 * Heat Recovery Experiment Valve Control
 */
 
int ValvePin = 10;        // set the DI/O pin to send the signal to the valve as pin 10
int ValveState = LOW;     // Valve state used to set the valve
unsigned long previousMillis = 0;    // will store last time valve was updated
long OnTime = 500;           // milliseconds of on-time
long OffTime = 500;          // milliseconds of off-time


// This sets the baud rate which is to do with displaying the values on the serial monitor
// Initiliase the valve pin (pin 10) as an output

void setup() {
  Serial.begin(9600);
  pinMode(ValvePin, OUTPUT);
}

// This is the loop which will be repeated. Everything above this can be given before the loop in the combined code.
// The code below needs to somehow be included in with the code for operating the valve

void loop() {

  // check to see if it's time to change the state of the valve
  unsigned long currentMillis = millis();
 
  if((ValveState == HIGH) && (currentMillis - previousMillis >= OnTime))
  {
    ValveState = LOW;  // Turn it off
    previousMillis = currentMillis;  // Remember the time
    digitalWrite(ValvePin, ValveState);  // Update the actual valve
  }
  else if ((ValveState == LOW) && (currentMillis - previousMillis >= OffTime))
  {
    ValveState = HIGH;  // turn it on
    previousMillis = currentMillis;   // Remember the time
    digitalWrite(ValvePin, ValveState);    // Update the actual LED
  }
}