const int VAL_PROBE = 0; //Analog pin 0 const int MOISTURE_LEVEL = 450; // the value after the LED goes on void setup() { Serial.begin(9600); pinMode(13, OUTPUT); pinMode(7, OUTPUT); } void LedState(int state) { digitalWrite(7,state); } void loop() { int moisture = analogRead(VAL_PROBE); Serial.print("Fugtighed = "); Serial.println(moisture); if(moisture > MOISTURE_LEVEL) { LedState(HIGH); digitalWrite(13,LOW); } else { LedState(LOW); digitalWrite(13,HIGH); } delay(500); }