Code.ino

    #include <Servo.h> // Including the servo header for using servo funtion codes
    Servo myservo; 
    int pos = 90;   // initial position
    int sens1 = A0; // LRD 1 pin
    int sens2 = A1; //LDR 2 pin
    int tolerance = 2;
    void setup() 
    { 
      myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
      pinMode(sens1, INPUT);
      pinMode(sens2, INPUT);
      myservo.write(pos);
      delay(2000); // A 2 seconds delay while we position the solar panel
    }  
    void loop() 
    { 
      int val1 = analogRead(sens1); // read the value of sensor 1
      int val2 = analogRead(sens2); // read the value of sensor 2
      if((abs(val1 - val2) <= tolerance) || (abs(val2 - val1) <= tolerance)) {
        //do nothing if the difference between values is within the tolerance limit
      } else {    
        if(val1 > val2) // Comparing the voltage difference across the two ldr
        {
          pos = --pos; // Postion of the solar panel is adjusted towards the sun
        }
        if(val1 < val2) 
        {
          pos = ++pos;
        }
      }
     
      if(pos > 180) { pos = 180; } // reset to 180 if it goes higher
      if(pos < 0) { pos = 0; } // reset to 0 if it goes lower
      
      myservo.write(pos); // write the position to servo
      delay(50);
    }