++
/*
 * This is the Arduino code for the Light module for Arduino (basic).
This video shows you how to turn an AC light ON during the night using a light sensor 
and turn it OFF during the day. This code is a basic version where 
the digital output of the module is used.
 // Written for Robojax.com video 

 * Watch the HC-SR505 Motion Sensor video for details https://youtu.be/qhThpxiXubI
 * Code is available at http://robojax.com/learn/arduino

 * 
 // Written by Ahmad S. for Robojax.com on 
// February 10, 2018 at 13:43 in Ajax, Ontario, Canada
*/
#define LIGHT 2 // define pin 2 for sensor
#define RELAY 9 // define pin 9 as for relay

/*
 * Permission granted to share this code given that this
 * note is kept with the code.
 * Disclaimer: this code is "AS IS" and for educational purposes only.
 * 
 */

void setup() {
  // Light LDR Sensor Code by Robojax.com 20180210
  Serial.begin(9600);// setup Serial Monitor to display information
  pinMode(LIGHT, INPUT_PULLUP);// define pin as Input  sensor
  pinMode(RELAY, OUTPUT);// define pin as OUTPUT for relay
}

void loop() {
  // Light LDR Sensor Code by Robojax.com 20180210
  int L =digitalRead(LIGHT);// read the sensor 
  
      if(L == 1){
    Serial.println(" light is ON");
    digitalWrite(RELAY,LOW);// turn the relay ON
  }else{

     Serial.println("  === light is OFF");
     digitalWrite(RELAY,HIGH);// turn the relay OFF
  }
  delay(500);
 // Light LDR Sensor Code by Robojax.com 20180210
}

/*
Light Sensor module for Arduino (Advanced: analog)
This video shows you how to turn an AC light ON during the night using 
a light sensor and turn it OFF during the day. 
This code is to control a light either digitally and control 
the sensitivity with the potentiometer on the module. 
You can control the light using an analog value from pin A0
and set your own sensitivity. Make sure you turn the 
potentiometer to the maximum value and set digital=false.
 // Written for Robojax.com video 

 * Watch Light Sensor video https://youtu.be/CyDAWcY8_5w
 * Code is available at http://robojax.com/learn/arduino
 * 
*/
#define LIGHT 2 // define pin 2 for sensor
#define RELAY 9 // define pin 9 as for relay

/*
 * 
// Written by Ahmad S. for Robojax.com on 
// February 10, 2018 at 13:43 in Ajax, Ontario, Canada
 * Permission granted to share this code given that this
 * note is kept with the code.
 * Disclaimer: this code is "AS IS" and for educational purposes only.
 * 
 */



// LDR, Light Dependant Resistor


boolean digital = false;// set true to use digital and control the sensitivity with potentiometer on the module
                  // set to false to control with A0 value on Arduino
unsigned int LightValue = 350;// LightValue to determine
                      // at what value the relay should be ON                      

void setup() {
  // Light LDR Sensor Code by Robojax.com 20180210
  Serial.begin(9600);// setup Serial Monitor to display information
  pinMode(LIGHT, INPUT_PULLUP);// define pin as Input  sensor
  pinMode(RELAY, OUTPUT);// define pin as OUTPUT for relay
}

void loop() {

  delay(500);
  relay();// call the relay() method
 // Light LDR Sensor Code by Robojax.com 20180210
}

void relay()
{
   if(digital == true)
   {
  // Light LDR Sensor Code by Robojax.com 20180210
  int L =digitalRead(LIGHT);// read the sensor 
  
      if(L == 1){
        Serial.println(" light is ON");
        digitalWrite(RELAY,LOW);// turn the relay ON
      }else{
         Serial.println("  === light is OFF");
         digitalWrite(RELAY,HIGH);// turn the relay OFF
      } // if   
   }// if digital end
   else
   {
    int a0Value = analogRead(A0);// read A0 value
    
      if( a0Value >= LightValue){
        Serial.print(analogRead(A0));
        Serial.println(" Light is ON");
        digitalWrite(RELAY,LOW);// turn the relay ON
      }else{
         Serial.print(analogRead(A0));
         Serial.println("  === light OFF");
         digitalWrite(RELAY,HIGH);// turn the relay OFF
      } // if      
   }
}