#include <IRremote.h>  // Library to receive IR signals from the remote
#include <ESP32Servo.h>  // Import ESP32Servo library to control the servo motor

Servo servo;
#define PIN_RECEIVER 15  // Define the pin where the IR sensor is connected

IRrecv receiver(PIN_RECEIVER); // Create a receiver object to receive signals from the IR remote
decode_results results;

int pos = 0;  // Variable to store the servo position

void setup() {
  Serial.begin(115200);  // Start serial communication with a baud rate of 115200
  receiver.enableIRIn();  // Start receiving IR signals
  servo.attach(18);  // Attach the servo to pin 18
}

void loop() {
  if (receiver.decode()) {  // If an IR signal is received
    int key_value = translateIR();  // Translate the IR signal into a number or button code

    receiver.resume();  // Clear the IR receiver buffer to receive new signals

    // Debugging: print key_value to see if the button codes are correct
    Serial.println("Key value: " + String(key_value));

    if (key_value == 99) {  // If the translated IR button is 2 "+" (button to increase)
      pos++;  // Increase the servo position
      if (pos >= 180)  // The maximum angle limit for the servo is 180 degrees
        pos = 180;
    }

    if (key_value == 88) {  // If the translated IR button is 152 "-" (button to decrease)
      pos--;  // Decrease the servo position
      if (pos <= 0)  // The minimum angle limit for the servo is 0 degrees
        pos = 0;
    }
    
    // Move the servo to the 'pos' position based on the value
    servo.write(pos);
    
    // Display the servo position on the serial monitor
    Serial.println("Servo angle: " + String(pos));
  }
}

// Translate the received IR code into a number or command
int translateIR() {
  switch (receiver.decodedIRData.command) {
    case 2: return 99;    // Code 2 from the remote is translated into the command "+"
    case 152: return 88;  // Code 152 from the remote is translated into the command "-"
    default: return -1;   // If the button is not recognized, return -1
  }
}