Arduino, Light Sensor.

#include

IRsend irsend;

void setup()
{
     Serial.begin(115200);
     pinMode (A0, INPUT);
     pinMode (13, OUTPUT);
}

void loop()
{
     while (Serial.available() == 0);

     int pr = analogRead(A0);
     int val = Serial.read();

     if (val == 81) {
             irsend.sendNEC( 0x1067A857, 32 );
             Serial.println( "NeoSaid: Received Q." );

     } else if (val == 87) {
             irsend.sendNEC( 0x1067A857, 32 );
             Serial.println( "NeoSaid: Received W." );

     } else if (val == 69) {
             Serial.println(pr);

             if (pr > 700) {
                     Serial.println( "NeoSaid: Light Up." );
             } else {
                     Serial.println( "NeoSaid: Light Down." );
             }

             Serial.println( "NeoSaid: Received E." );
     } else {
             Serial.println( "NeoSaid: Nothing found!!!" );
     }

     //Serial.println(val);
}