// Arduino + HC-05 Bluetooth Communication Example
#include 

// Define RX and TX pins for HC-05 module
const uint8_t BT_RX = 10; // Arduino receives from HC-05 on pin 10
const uint8_t BT_TX = 11; // Arduino transmits to HC-05 on pin 11

// Create SoftwareSerial object for Bluetooth
SoftwareSerial BTSerial(BT_RX, BT_TX);

void setup() {
  // Start serial communication with PC (Serial Monitor)
  Serial.begin(9600);
  
  // Start serial communication with HC-05 Bluetooth module
  BTSerial.begin(9600);

  Serial.println("🔵 HC-05 Bluetooth Module Ready. Waiting for data...");
}

void loop() {
  // If data is received from HC-05, forward it to Serial Monitor
  if (BTSerial.available()) {
    char receivedChar = BTSerial.read();
    Serial.print("🔹 From Bluetooth: ");
    Serial.println(receivedChar);
  }

  // If data is entered in Serial Monitor, send it to HC-05
  if (Serial.available()) {
    char inputChar = Serial.read();
    BTSerial.write(inputChar);
  }
}