HC05 Bluetooth Module, Study Guides, Projects, Research of Embedded Systems

Download HC05 Bluetooth Module and more Study Guides, Projects, Research Embedded Systems in PDF only on Docsity!

“Your Robotic Solution”

www.mybotic.com.my

HC-05 Bluetooth Module

User’s Manual V1.

Contents

• 1. Introduction
• 2. Pin Definition
• 3. Sample Hardware Installation and Sample Source Code
• 4. Communication between Arduino UNO and PC via Bluetooth
• 5. Warranty

2. Pin Definition

Pin Description Function VCC +5V Connect to +5V

GND Ground Connect to Ground

TXD UART_TXD, Bluetooth serial signal sending PIN

Connect with the MCU’s (Microcontroller and etc) RXD PIN.

RXD UART_RXD,

Bluetooth serial signal receiving PIN

Connect with the MCU’s (Microcontroller and etc) TXD PIN.

KEY Mode switch input

If it is input low level or connect to the air, the module is at paired or communication mode. If it’s input high level, the module will enter to AT mode.

TXD

VCC

GND

RXD

KEY

3. Sample Hardware Installation and Sample Source Code

Below is the example of interfacing between Arduino UNO and PC via HC-05 Bluetooth Module. In this example, the communication mode is used.

*Note: For AT mode (use to change the default setting or etc), please refer to this link Modify The HC-05 Bluetooth Module Defaults Using AT Commands.

Diagram below shows the hardware connection between HC-05 Bluetooth Module and Arduino UNO. Besides Arduino, it may interface with any microcontroller such as PIC and etc.

 VCC  Arduino 5V  GND  Arduino GND  TXD  Arduino Pin RX  RXD  Arduino Pin TX  KEY  Connect to the air for communication mode

10k

In order to use Bluetooth device in PC site, Bluetooth Device Driver is needed to install in PC. If your USB Plug in Bluetooth device does not provides driver installation, you may download this PC Site Bluetooth Software and install it. Plug in your Bluetooth device to PC during installation and restart PC after installation.

After setting up the Arduino UNO and PC site, now we proceed to next session which will show communication between Arduino UNO and PC through Bluetooth devices via communication mode.

4. Communication between Arduino UNO and PC via Bluetooth

To communicate between Arduino UNO and PC through Bluetooth, please follow below steps.

Step 1

Turn on Arduino UNO which with completed installation of sample hardware and source code.

Step 2

Go to [desktop]  open [Bluetooth Places]

Step 5

Double Click [Center Ball of Bluetooth software] to search surrounding available Bluetooth device.

The HC-05 Bluetooth Module will be found and shown on the display.

Step 6

Select the HC-05 Bluetooth Module on the display and double click the Serial Port Icon to connect.

Step 7

Key in default passwords: 1234 on [Passkey] to connect HC-05 Bluetooth Module.

Step 9

1. Select the correct Serial Com (in this example, “COM8” is the correct Serial Com).
2. Select Baud Rate as 9600 (default in communication mode).
3. Click “Open”.

It will shows “COM open successfully” if open successful.

Step 10

Now you may send whatever you want to Arduino UNO by

1. Writing data on text box and then
2. Click write.

In Arduino site, the data was received and display on LCD.

5. Warranty

 Product warranty is valid for 3 months.  Warranty only applies to manufacturing defect.  Damaged caused by misuse is not covered under warranty.  Warranty does not cover shipping cost for both ways.

Prepared by Mybotic

4, Jalan Universiti 3, Taman Universiti, 86400, Parit Raja, Johor

Tel: +6016-7170703 / +6018-

URL : www.mybotic.com.my Email : support@mybotic.com.my sales@mybotic.com.my