Open-Acidification/Set_Chiller.ino at master · PlasmaIntec/Open-Acidification · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
// ************************************************
// Set chiller state
// ************************************************

void Set_Chiller()
{
  if (heat == 0) {
    unsigned long chiller_currentMillis = millis();
    if (chiller_currentMillis - chiller_previousMillis >= chiller_interval) { //pause 30 seconds between swtiching chiller on and off to prevent damage to chiller
      chiller_previousMillis = chiller_currentMillis;
      if (temp >= tempset + 0.05) {                                          //if the observed temperature is greater than or equal the temperature setpoint plus .05 degree
        Serial.println(F("chiller on"));                                     //print chiller state to serial
        digitalWrite(chiller, LOW);
      }
      if (temp <= tempset - 0.05) {                                          //see if temperature is lower than .05 below setpoint
        Serial.println(F("chiller off"));                                    //print chiller state to serial
        digitalWrite(chiller, HIGH);
      }
    }

  }
  if (heat == 1) {
    if (temp <= tempset + 0.05) {                                          //if the observed temperature is less than or equal the temperature setpoint plus .05 degree
      Serial.println(F("chiller on"));                                     //print chiller state to serial
      digitalWrite(chiller, LOW);
    }
    if (temp >= tempset - 0.05) {                                          //see if temperature is greater than or equal to .05 below setpoint
      Serial.println(F("chiller off"));                                    //print chiller state to serial
      digitalWrite(chiller, HIGH);
    }
  }
}