#include <IRremote.h>
#include <Servo.h>

// Set up IR reciever pin
const byte IR_RECEIVE_PIN = 3;
// Create variable to store value recieved from the ir remote
int ir_command;
// Create Servo object
Servo myservo;
// Create servo angle variable, start at 90 degrees, can be any angle between 0 to 180 degrees
int servoangle = 90;
// Set an initial angle increment that the up/down arrows will move the servo by (in degrees)
int increment=10;

void setup()
{
   Serial.begin(9600);  // start serial monitor to visualize data
   IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK); // start IR receiver library
   Serial.println("IR Receiver Online");   // print initial message
   myservo.attach(9); // Servo signal wire on pin 9
   myservo.write(servoangle); // write the desired servo angle (servoangle) to the servo motor
   delay(20);  // every servoname.write(angle); function call needs a 20 ms delay or timer to update servo position
}

void loop()
{
      // Move servo to new position, just need to update servoangle variable inside IrReceiver().decode if statement below
      myservo.write(servoangle);  // write the desired servo angle (servoangle) to the servo motor
      delay(20);  // every servoname.write(angle); function call needs a 20 ms delay or timer to update servo position
      
   if (IrReceiver.decode()) // Only perform an action if an IR signal is read by the reciever from the remote
   {
      ir_command = IrReceiver.decodedIRData.command;   // Decode IR remote button press signal data
      //Serial.println(ir_command); // Print decoded IR remote button press signal signal received

      switch(ir_command) {
        case 162: servoangle = 90; break; //Power = 90 degrees
        case 224: servoangle = 0; break; //|<< = 0 degrees
        case 144: servoangle = 180; break; //>>| = 180 degrees
        case 194: servoangle += increment; break; //Up arrow = angle + increment
        case 34: servoangle -= increment; break; //Down arrow = angle - increment
        case 2: increment ++; break; //Vol + = increment + 1
        case 152: increment --; break; //Vol - = increment - 1
      }

      if (servoangle > 180) {servoangle = 180};
      else if (servoangle < 0) {servoangle = 0};
      else if (increment < 1) {increment = 1};

      /*   No changes needed below */

      // Prints the final values of 'increment' and servoangle - check these to make sure they don't exceed limits
      // and are responding correctly to button presses 
      Serial.print("***Increment = ");
      Serial.println(increment);
      Serial.print("***Servo Angle = ");
      Serial.println(servoangle);

      // must always have this line at the end of "if (IrReceiver.decode())"
      IrReceiver.resume();  // Resume waiting for the next IR remote button press
   }  // End IR receiver decode if statement after button pressed
} // End void loop, head back to the top of the void loop again