// HVAC Controller Program R1.0
// By Marty Sockolov


// Set Variables
int LED = 38;      // The digital pin to which the LED is connected
                   // INPUTS
int lrh1Pin = 22;  //Living room heat, stage 1 is on pin 22
int lrh2Pin = 23;  //Living room heat, stage 2
int lrc1Pin = 24;  //Living room cooling, stage 1
int lrc2Pin = 25;  //Living room cooling, stage 2
int lrfnPin = 26;  //Living room fan

int oh1Pin = 27;  //Office Heat
int oc2Pin = 28;  //Office 2nd Stage Cooling

int mbrhPin = 29;  //Master Bedroom Heat
int mbrcPin = 30;  //Master Bedroom Cooling

int mbth1Pin = 31;  //Master Bathroom Heat Stage 1
int mbthcPin = 32;  //Master Bathroom Cooling

int bhhPin = 33;    //Basement Heat Stage 1 (Hydronic)
int bhePin = 34;    //Basement Heat Stage 2 (electric)
int bcPin = 35;     //Basement Cooling
int bfnPin = 36;    //Basement Fan
int onoffPin = 0;   //all off
int sumwinPin = 1;  //Hydronic Heat Pump Heat/Cool switchover

//  Outputs
int pmp1Pin = 42;  //Pump 1 is on pin 42
int pmp2Pin = 41;  //Pump 2
int pmp3Pin = 40;  //Pump 3
int pmpuPin = 5;   //Upstairs Pump
int ahuPin = 4;    //Upstairs air handler/AC

int valv1Pin = 3;   //Zone 1 valves   //Liv rm, dining, kitchen, entry
int valv2Pin = 2;   //Zone 2 valves -master bed room and closet
int valv3Pin = 49;  //Zone 3 valves -master bath
int valv4Pin = 48;  //Zone 4 valves -office
int valvbPin = 47;  //Basement heater valve
int valvuPin = 46;  //Upstairs air handler valve
int bshtelec = 43;  //Basement heater electric
int bshtfan = 44;   //Basement heater fan


void setup() {
  // setup pins
  pinMode(LED, OUTPUT);  //Declaring pin 13 (LED) as output pin
  pinMode(22, INPUT);    //sets pins as inputs
  pinMode(23, INPUT);
  pinMode(24, INPUT);
  pinMode(25, INPUT);
  pinMode(26, INPUT);
  pinMode(27, INPUT);
  pinMode(28, INPUT);
  pinMode(29, INPUT);
  pinMode(30, INPUT);
  pinMode(31, INPUT);
  pinMode(32, INPUT);
  pinMode(33, INPUT);
  pinMode(34, INPUT);
  pinMode(35, INPUT);
  pinMode(36, INPUT);
  pinMode(0, INPUT);  //set pin A0 as an input for on/off mode
  pinMode(1, INPUT);  //set pin A1 as an input for summer/winter mode

  pinMode(42, OUTPUT);    //sets pin as an output
  digitalWrite(42, LOW);  //sets default to off or “low” on startup
  pinMode(41, OUTPUT);
  digitalWrite(41, LOW);
  pinMode(40, OUTPUT);
  digitalWrite(40, LOW);
  pinMode(5, OUTPUT);
  digitalWrite(5, LOW);
  pinMode(4, OUTPUT);
  digitalWrite(4, LOW);
  pinMode(3, OUTPUT);
  digitalWrite(3, LOW);
  pinMode(2, OUTPUT);
  digitalWrite(2, LOW);
  pinMode(49, OUTPUT);
  digitalWrite(49, LOW);
  pinMode(48, OUTPUT);
  digitalWrite(48, LOW);
  pinMode(47, OUTPUT);  //basment heat valve
  digitalWrite(47, LOW);
  pinMode(46, OUTPUT);
  digitalWrite(46, LOW);
  pinMode(45, OUTPUT);  // set pin 45 as output to geothermal heat pump for on/off mode
  digitalWrite(45, LOW);
  pinMode(44, OUTPUT);  // set pin 44 as output for basement heater fan
  digitalWrite(44, LOW);
  pinMode(43, OUTPUT);  // set pin 43 as output for basment heater (electric)
  digitalWrite(43, LOW);
}

void loop()

// set up summer/winter and summer/winter changeover (controlled by dig input from Z-Wave controller)
//
//***Flash LED***
{
  {
    digitalWrite(LED, HIGH);  //Turn ON the LED
    delay(1000);              //Wait for 1sec
    digitalWrite(LED, LOW);   // Turn off the LED
    delay(1000);              // Wait for 1sec
  }

  // ***on-off***
  {
    if (onoffPin == HIGH) {
      digitalWrite(pmp1Pin, LOW);  // if low turn off pumps and valves
      // digitalWrite(pmp2Pin, LOW);
      // digitalWrite(pmp3Pin, LOW);
      // digitalWrite(valv1Pin, LOW);
      // digitalWrite(valv2Pin, LOW);
      // digitalWrite(valv4Pin, LOW);
      // digitalWrite(valv4Pin, LOW);
    }
  }
  //else {
  //Do nothing
  //}
  // ***LIVING ROOM***
  //If Living Room Heat 1 input is High, turn on Pumps 1,2,3 and zone valves 2,3,5,9,11 (zone 1), if low turn off

  {
    int lrh1result = digitalRead(22);

    //digitalRead(lrh1result)                       //Read LR heating stage 1 and declare a variable
    if (lrh1result == HIGH) {
      digitalWrite(pmp1Pin, HIGH);  // if high, turn on pumps and valves
      digitalWrite(pmp2Pin, HIGH);
      digitalWrite(pmp3Pin, HIGH);
      digitalWrite(valv1Pin, HIGH);
    }

    else {
      digitalWrite(pmp1Pin, LOW);  // if low turn off pumps and valves
      digitalWrite(pmp2Pin, LOW);
      digitalWrite(pmp3Pin, LOW);
      digitalWrite(valv1Pin, LOW);  // pumps 1,2,3 and valves 2,3,5,9,11,
    }
  }

  {
    digitalRead(lrh2Pin);  //LR heating stage 2 (upstairs unit)
    if (lrh2Pin == HIGH) {
      digitalWrite(pmpuPin, HIGH);
      digitalWrite(valvuPin, HIGH);
      digitalWrite(lrfnPin, HIGH);
    } else {
      digitalWrite(pmpuPin, LOW);
      digitalWrite(valvuPin, LOW);
      digitalWrite(lrfnPin, LOW);
    }
  }

  {
    digitalRead(lrc1Pin);  //LR cooling stage 1 (Upstairs unit)
    if (lrc1Pin == HIGH) {

      digitalWrite(ahuPin, HIGH);    //Upstairs air handler
      digitalWrite(valvuPin, HIGH);  //Upstairs Valve
      digitalWrite(pmpuPin, HIGH);   //Upstairs pump
    } else {
      digitalWrite(ahuPin, LOW);    //Upstairs air handler
      digitalWrite(valvuPin, LOW);  //Upstairs Valve
      digitalWrite(pmpuPin, LOW);   //Upstairs pump
    }
  }

  {
    digitalRead(lrc2Pin);  //LR cooling stage 2 (Hydronic)
    if (lrc2Pin == HIGH) {
      digitalWrite(pmp1Pin, HIGH);  // if high, turn on pump and valves
      digitalWrite(pmp2Pin, HIGH);
      digitalWrite(pmp3Pin, HIGH);
      digitalWrite(valv1Pin, HIGH);
    } else {
      digitalWrite(pmp1Pin, LOW);  // if low, turn off pump and valves
      digitalWrite(pmp2Pin, LOW);
      digitalWrite(pmp3Pin, LOW);
      digitalWrite(valv1Pin, LOW);
    }
  }

  {
    digitalRead(lrfnPin);  //LR fan
    if (lrfnPin == HIGH) {
      digitalWrite(lrfnPin, HIGH);
    } else {
      digitalWrite(lrfnPin, LOW);
    }
  }
  // ***OFFICE***
  // Note: since cooling is controlled by living room t-stat, 1st stage cooling is not used. If second stage cooling is called, turn on hydronic.
  {
    //digitalRead(oh1Pin);                          // if office thermostat calling for heat
    //digitalRead (sumwinPin);                      // and its winter

    if (digitalRead(oh1Pin == HIGH) && digitalRead(sumwinPin == HIGH)) {
      digitalWrite(pmp3Pin, HIGH);
      digitalWrite(valv4Pin, HIGH);  //turn on pump and valve
    } else {
      digitalWrite(pmp3Pin, LOW);  // Otherwise turn off
      digitalWrite(valv4Pin, LOW);
    }
  }

  {
    digitalRead(oc2Pin);     // if office thermostat calling for 2nd stage cooling
    digitalRead(sumwinPin);  // and its summer turn on hydronic pump 3 and valve 4
    if ((oc2Pin == HIGH) && (sumwinPin == LOW)) {
      digitalWrite(pmp3Pin, HIGH);
      digitalWrite(valv4Pin, HIGH);
    } else {
      digitalWrite(pmp3Pin, LOW);  //if not turn off pump and valve
      digitalWrite(valv4Pin, LOW);
    }

    //*****Basement******
    {
      digitalRead(bhhPin);  //Basement heat stage 1 (Electric)
      if (bhhPin == HIGH) {
        digitalWrite(bshtelec, HIGH);  //Basement heater on
      } else {
        digitalWrite(bshtelec, LOW);  //Basement heater off
      }
    }

    {
      digitalRead(bhhPin);  //Basement heat hydronic
      if (bhhPin == HIGH) {
        digitalWrite(valvbPin, HIGH);  //Basement Valve
        digitalWrite(pmp1Pin, HIGH);   // Basement Pump
        delay(90000);                  // delay fan until coil heats up for 90 seconds
        digitalWrite(bshtfan, HIGH);   //Basement fan
      } else {
        digitalWrite(pmp1Pin, LOW);   //Pump off
        digitalWrite(valvbPin, LOW);  // Valve off
        delay(20000);                 // continue fan for 20 seconds
        digitalWrite(bshtfan, LOW);   // Fan off
      }
    }
  }
}