arduino/code/code.ino at master · RaspberryPiPlantMonitor/arduino · GitHub

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#define pumpPin 2
#define lightPin 3
#define humidityPin A0

float humidityValue = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600); // open the serial port at 9600 bps:
  pinMode(humidityPin, INPUT);
  pinMode(lightPin, OUTPUT);
  pinMode(pumpPin, OUTPUT);

  digitalWrite(lightPin, LOW);
  digitalWrite(pumpPin, HIGH);
}

void loop() {
  String data = Serial.readString();

  humidityValue = analogRead(humidityPin);
  Serial.print("{\"humidityValue\":"+String(humidityValue)+",\"lightValue\":"+data[0]+","+"\"pumpValue\":"+data[1]+"}\n");

  // Control IoT Relay
  if (data[0] == '1'){
    digitalWrite(lightPin, HIGH);
  } else if (data[0] == '0') {
    digitalWrite(lightPin, LOW);
  }

  // Control Pump - TODO
  if (data[1] == '1'){
    digitalWrite(pumpPin, LOW);
  } else if (data[1] == '0'){
    digitalWrite(pumpPin, HIGH);
  }
}