/* Based on: http://www.ardumotive.com/how-to-use-a-photoresistor-en.html

   Dev: Michalis Vasilakis // Date: 8/6/2015 // www.ardumotive.com

   Modified by Gleb, Lukasz*/

  

#include <SoftwareSerial.h>

 

//Constants

const int pResistor = A3; // Photoresistor pin

const int ledPin =  A2;// LED pin

 

//Variables

uint16_t value;          // Store value from photoresistor (0-1023)

int ledState = LOW;             // ledState used to set the LED

 

void setup(){

 

 unsigned long previousMillis = 0;        // will store last time LED was updated

pinMode(ledPin, OUTPUT);  // Set LEDPin - A2 pin as an output

pinMode(pResistor, INPUT);// Set pResistor - A3 pin as an input (optional)

}


void loop(){

  value = analogRead(pResistor);

 

  if (value > 500){   //You can change value "25"

    digitalWrite(ledPin, LOW);  //Turn led off

    delay(100);

    digitalWrite(ledPin, HIGH);  //Turn led on

  }

  else{

    digitalWrite(ledPin, HIGH); //Turn led on

  }

}