HC-06 Bluetooth Module

HC-06 Bluetooth Module Documentation

Overview

The HC-06 Bluetooth Module is a widely used Bluetooth Serial Port Protocol (SPP) module that allows microcontrollers to communicate with Bluetooth-enabled devices. It is a low-cost, compact module that operates at a frequency of 2.4 GHz and has a transmission range of up to 10 meters.

Pinout

The HC-06 Bluetooth Module has the following pins:

VCC: Power supply (3.3V - 5V)
 GND: Ground
 TXD: Transmitter data
 RXD: Receiver data
 STATE: State indicator (high when paired, low when not paired)
 EN: Enable pin (high to enable, low to disable)

Operation

The HC-06 Bluetooth Module operates in two modes:

Command mode: Allows the user to configure the module using AT commands.
 Data mode: Used for transmitting and receiving data.

Code Examples

### Example 1: Arduino Serial Communication with HC-06 Bluetooth Module

In this example, we will connect the HC-06 Bluetooth Module to an Arduino board and establish a serial communication between the two devices.

Hardware Requirements

Arduino Board (e.g., Arduino Uno)
 HC-06 Bluetooth Module
 Jumper Wires

Software Requirements

Arduino IDE

Code
```cpp
#include <SoftwareSerial.h>

// Define software serial pins for HC-06 Bluetooth Module
SoftwareSerial BTSerial(2, 3); // RX, TX

void setup() {
  Serial.begin(9600);
  BTSerial.begin(9600);
}

void loop() {
  if (BTSerial.available() > 0) {
    char c = BTSerial.read();
    Serial.print(c);
  }
  if (Serial.available() > 0) {
    char c = Serial.read();
    BTSerial.print(c);
  }
  delay(50);
}
```
In this code, we use the SoftwareSerial library to establish a serial communication between the Arduino board and the HC-06 Bluetooth Module. The `BTSerial` object is used to send and receive data with the Bluetooth module.

### Example 2: Android App Communication with HC-06 Bluetooth Module using Python

In this example, we will create a simple Android app that communicates with the HC-06 Bluetooth Module using Python.

Hardware Requirements

Android Device with Bluetooth capability
 HC-06 Bluetooth Module
 Microcontroller (e.g., Raspberry Pi) with Python installed

Software Requirements

Python 3.x
 PySerial library
 Android Studio

Code

Python Code (HC-06 Bluetooth Module side)
```python
import serial

# Open the serial port
ser = serial.Serial('/dev/ttyUSB0', 9600)

while True:
    # Read data from the serial port
    data = ser.readline().decode('utf-8').strip()
    print(data)
```
In this code, we use the PySerial library to open the serial port and read data from the HC-06 Bluetooth Module.

Android Code (Android App side)
```java
// Import necessary libraries
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

// Create a Bluetooth adapter
BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();

// Connect to the HC-06 Bluetooth Module
BluetoothDevice device = btAdapter.getRemoteDevice("HC-06_MAC_ADDRESS");
BluetoothSocket socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));

// Send data to the HC-06 Bluetooth Module
socket.getOutputStream().write("Hello, HC-06!".getBytes());

// Receive data from the HC-06 Bluetooth Module
byte[] buffer = new byte[1024];
int bytesRead = socket.getInputStream().read(buffer);
String data = new String(buffer, 0, bytesRead);
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(data);
```
In this code, we use the Android Bluetooth API to connect to the HC-06 Bluetooth Module and send and receive data.

Note: Replace "HC-06_MAC_ADDRESS" with the actual MAC address of your HC-06 Bluetooth Module.