Auto fill your kettle

ro-water.ino

void setup() {
  pinMode(A0, INPUT);
  digitalWrite(A0, HIGH);
  pinMode(A2, OUTPUT);
  digitalWrite(A2, LOW);
}

void loop() {
  delay(50);
  int waterLevel = digitalRead(A0); // Read sensor
  delay(50);
  int waterLevel1 = digitalRead(A0);
  if(waterLevel != waterLevel1) // debounce
    return;
  if(waterLevel == HIGH){ // EMPTY // In the last version should be HIGH
    digitalWrite(A2, HIGH); // TURN ON WATER
  } else { // FULL
    digitalWrite(A2, LOW); // TURN OFF WATER
    delay(300000); // Wait until the user no longer needs hot water
  }
}