int val; int i; void setup() { pinMode(3, OUTPUT); Serial.begin(115200); for(i = 1; i <= 20; i++) { val = analogRead(A4); //read value from thermistor Serial.println(val); //display if(val > 550) { digitalWrite(3, HIGH); // Turn ON buzzer } else { digitalWrite(3, LOW); // Turn OFF buzzer } delay(500); } digitalWrite(3, LOW); // Turn OFF buzzer } void loop() { }