Bluetooth Module Master Slave HC-05

Description

Bluetooth HC05 Bare Module

HC05 Module is an easy to use Bluetooth SPP(Serial Port Protocol) module and it is designed for wireless serial communication applications. This module supports Bluetooth 2.0 and it provides a 10m communication range in open spaces and it communicates in 2.4GHz frequency. You can use it in hobby, robotic or academic projects.

Quick Specification :

• Supply voltage: 3.3V
• Signal voltage: 3.3V (use a level converter or a voltage divider on the RX signal of this module!)
• Range: 10m (in open air)
• LED indication present (indicates status Bluetooth connection)
• Possible baud rates in standard mode: 1200 – 115200bps
• Baud rate in standard mode: 9600 (adjustable)
• Baud rate in AT command mode: 38400
• Standard Bluetooth pin/password: 1234
• Bluetooth version: 2.0
• Dimensions: 28 x 13mm
• Net Weight: 2g

HC-05 Master Slave Bluetooth Module
Item No.: KR06112

1. Introduction
If you’ve ever looked into controlling an Arduino remotely, then you’ve probably come across these hc-05 Bluetooth modules. Setting up serial communication from the computer is a simple task.

2. Specification
1. Using mainstream CSR Bluetooth chip, Bluetooth V2.0 protocol standards
2. Serial module operating voltage 3.3V
3. The factory default baud rate 9600, the user can set
4. Working current: pairing for 30MA, pairing is complete communications for 8MA
5. Sleep Current: Do not Sleep
6. For GPS navigation systems, utility meter reading systems, industrial control systems mining site
7.You can add a Bluetooth laptop, computer Bluetooth adapter, PDA and other devices to connect seamlessly

Note: This module can be set to master or slave, the master and slave pair can communicate, can not communicate with the slave between the host and the host machine or from a Bluetooth function and computers, mobile phones and other communication pairing, the purchase of default from the machine

3. AT Command Application :
Step by step using Bluetooth HC-05 to controlling Arduino

1. Put the module to be used as master into AT command mode. If you have an Arduino handy, techbitar gave an excellent tutorial on how to do that here:

#include <SoftwareSerial.h>
SoftwareSerial BTSerial(10, 11); // RX | TX

void setup()
{
  pinMode(9, OUTPUT);  // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode
  digitalWrite(9, HIGH);
  Serial.begin(9600);
  Serial.println("Enter AT commands:");
  BTSerial.begin(38400);  // HC-05 default speed in AT command more
}

void loop()
{

  // Keep reading from HC-05 and send to Arduino Serial Monitor
  if (BTSerial.available())
    Serial.write(BTSerial.read());

  // Keep reading from Arduino Serial Monitor and send to HC-05
  if (Serial.available())
    BTSerial.write(Serial.read());
}

2. If you followed techbitars instructions, or already know how to do this, congrats! You’ll need to set up a serial connection with the module to be used as the master. What follows is just one method of accomplishing this.
3. If you bought two modules you’ll be able to use the slave module to program the master. Connect the RXD of the slave to the TXD of the master and vice versa.
4. PS : the module should indicate that it’s in AT Mode by blinking the LED in an interval of 2 seconds. You should get response in the Serial Monitor by typing the AT commands by switching from “No line ending” to “Both NL and CR”. That’s about it.

Berikut ini AT Command (List Instruction) untuk mengakses internal configurasi HC-05.