//Controlling relay state based on ambient light levels using LDR(Light Dependent Resistor) sensor.
int sensorPin = A0;
int sensorValue = 0;
int thresholdValue = 700;
int relayPin = 8;
void setup(){
  pinMode(relayPin, OUTPUT);
  Serial.begin(9600);
}
void loop(){
  sensorValue = analogRead(sensorPin);
  Serial.println(sensorValue);
  if(sensorValue > thresholdValue){
    digitalWrite(relayPin, HIGH);
  }else{
    digitalWrite(relayPin, LOW);
  }
  delay(100);
}