// LDR + Arduino
// Sleep mode control based on light intensity

int ldrPin = A0;
int threshold = 500;

void setup() {
  Serial.begin(9600);
}

void loop() {

  int ldrValue = analogRead(ldrPin);

  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  if (ldrValue < threshold) {

    Serial.println("Sleep mode activated");

  } 
  else {

    Serial.println("Sleep mode deactivated");

  }

  Serial.println("----------------------");

  delay(1000);
}