#include <SoftwareSerial.h>

SoftwareSerial bluetooth(2, 3); // RX, TX

void setup() {
  Serial.begin(9600);
  bluetooth.begin(9600);
  Serial.println("Bluetooth ready!");
}

void loop() {
  if (bluetooth.available()) {
    char data = bluetooth.read();
    Serial.print("Received: ");
    Serial.println(data);
  }
  
  if (Serial.available()) {
    char data = Serial.read();
    bluetooth.print(data);
  }
}