HC-05 Bluetooth

HC-05 Bluetooth

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HC-05 Bluetooth



module name

Bluetooth UART RS232 serial converter module

Operating Frequency Band

2.4GHz ISM band

Bluetooth specification


USB protocol

USB v1.1/2.0

Output power class


operating voltage


Host interface


Flash Memory size



GFSK(Gaussian Frequency Shift Keying)

Transmit power

not more than 4dBm


not more than -80Bm at 0.1% BER

Communication rate


Working temperature

–25°C to 75°C




1, use the CSR mainstream bluetooth chip, bluetooth V2.0 protocol standards

2, serial port module working voltage 3.3 V.

3, Baud rate is 9600,  user can be set up.

4, module size for: 28 mm x 15 mm x 2 mm.

5, working current: when in matching is 30-40 MA,  when in communicating is 8 MA

6, dormancy current: no dormancy

7, used for GPS navigation system, water and electricity gas meter reading system, thecontrol system of the mining industry.

8, can usr for bluetooth notebook computers, computer and bluetooth adapter, PDA, seamless connection equipment


The Bluetooth UART RS232 serial Converter Module can easily transfer the UART data through the wireless Bluetooth, without complex PCB layout or deep knowledge in the Bluetooth software stack, you can combine this bluetooth module with your system:

* MCU, ARM or DSP systems.
* SOC systems.
* Personal Digital Assistants (PDAs) 
* Computer Accessories 
* Other systems your want to use under bluetooth functions.



CSR solution, Bluetooth V2.0 protocol

support AT commander

support Master and Slave mode, modify by AT commander

support 1200-115200 baudrate

3.3V single supply

current: 30mA MAX

can be used with all MCU by UART port

2 indicator lights


AT Command Set:
 HC-05 embedded Bluetooth serial communication module (hereinafter referred to as modules) has two operating modes: command-response mode and automatically connect mode, can be divided into the mainmodule automatically connect mode (Master) (Slave) three job roles and loopback (Loopback). When the moduleis automatically connected mode of operation, automatically according to pre-set data transmission connection;when the module is in order to respond to the operating mode can perform all of the following AT command,users can a variety of AT commands sent to the module for the module control parameters or release control commands. Can be achieved through the control module the external pin (PIO11,) input level, the dynamictransformation of the module status.

Pin definitions used by the serial module:
1, PIO8 connection LED, to indicate the module state, module power on after flashing a different state flashinginterval.
2.PIO9 connection LED, indicates that the module connection is successful, match the Bluetooth serial portconnection is successful, the LED long bright.
3. PIO11 module state switching feet high -> AT command response to working condition, low or floating ->Bluetooth regular work status.
4, the module has been with the reset circuit, re-power on to complete the reset.
To set the main modules:
1.PIO11 set high.
2.power-on module to enter the AT command response status.
3.HyperTerminal or other serial tools, set the baud rate 38400, 8 data bits, 1 stop bit, no parity, no flow control.
4.the serial port to send character "AT + ROLE \ r \ n" successful return "OK \ r \ n", where \ r \ n carriage return line feed.
5.PIO is low on power, the module re module, automatically search from the module, to establish a connection.



Abbiamo disponibili datasheet di tutti i componenti, qualora non fosse presente nella scheda download del prodotto inviaci un messaggio dal modulo contattaci e lo pubblicheremo il prima possibile nel nostro sito.


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HC-05 Bluetooth

HC-05 Bluetooth

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