banggood HC-05 User Manual

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1

HC-05

1. Overview:

This module supports UART, USB, SPI, PCM, SPDIF and other interfaces, and supports
SPP Bluetooth serial port protocol, which has the advantages of low cost, small size,
low power consumption, high sensitivity of sending and receiving.

2. Feature

Bluetooth V2.0+EDR
Bluetooth Class 2
Built-in PCB RF antenna
Built-in 8Mbit Flash
Support SPI programming interface
Support UART, USB, SPI, PCM and other interfaces
Support master and slave
Support software control master-slave module

3.3V power supply
Passed REACH, ROHS certification

3. Application areas:

Bluetooth car handsfree
Bluetooth GPS
Bluetooth PCMCIA, USB Dongle
Bluetooth wireless data transmission;
Industrial remote control, telemetry;
POS system, wireless keyboard, mouse;
Traffic, underground positioning, alarm;
Automated data acquisition system;
Wireless data transmission; banking system;
Wireless data collection;
Building automation, security, wireless monitoring of equipment room, access
control system;

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Operating Frequency Band

2.4GHz ISM band

Bluetooth Specification

V2.0+EDR

Output Power Class

Class 2

Operating Voltage

3.3V

Host Interface

USB 1.1/2.0 or UART

Audio Interface

PCM interface

Flash Memory Size

8Mbit

Dimension

27mm (L) x 13 (W) mm x 2mm (H)

Absolute Maximum Ratings

Rating

Min

Max

Storage temperature

-40℃+150

℃

Supply voltage: VBAT

-0.4V

5.6V

Other terminal voltages

VSS-0.4V

VDD+0.4V

Operation Mode

Connection Type

UART Rate(kbps)

Average

Unit

Page scan-115.2

0.42

mA

ACL No traffic

Master

115.2

4.60

mA

ACL With file transfer

Master

115.2

10.3

mA

Recommended Operating Conditions

Operating Condition

Min

Max

Operating temperature range

-40℃

+150℃

Guaranteed RF performance range

(a)

-40℃

+150℃

Supply voltage: VBAT

2.2V

4.2V

(b)

Smart home, industrial control;
Vehicle inspection equipment;
Interactive program voting equipment for television stations;
Government street lamp energy saving equipment
Wireless LED display system
Bluetooth joystick, Bluetooth gamepad
Bluetooth printer
Bluetooth remote control toy

4. Physical characteristics:

5. Electrical characteristics:

6. Power consumption:

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ACL 1.28s sniff

Master

38.4

0.37

mA

ACL 1.28s sniff

Slave

38.4

0.42

mA

SCO HV3 30ms sniff

Master

38.4

19.8

mA

SCO HV3 30ms sniff

Slave

38.4

19.0

mA

Standby Host connection

-

38.4

40

µA

7. Functional block diagram:

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8. Application circuit diagram:

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PIN

NAME

TYPE

Function

1

UART-TX

CMOS output

Serial data output

2

UART-RX

CMOS input

Serial data input

3

UART-CTS

CMOS input

Serial port clear send

4

UART-RTS

CMOS output

Serial port request to send

5

PCM-CLK

Two way

PCM clock

6

PCM-OUT

CMOS output

PCM data output

7

PCM-IN

CMOS input

PCM data input

8

PCM-SYNC

Two way

PCM data synchronization

9

AIO(0)

Two way

Programmable analog input and output

10

AIO(1)

Two way

Programmable analog input and output

11

RESETB

CMOS input

Reset/reset button

12

3.3V

power input

+3.3V power supply

13

GND

Ground

Ground

14

NC

Output

NC (please hang)

15

USB-DN

Two way

USB data negative

9. Pin function description:

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16

SPI-CSB

CMOS input

SPI chip select

17

SPI-MOSI

CMOS input

SPI data input

18

SPI-MISO

CMOS output

SPI data output

19

SPI-CLK

CMOS input

SPI clock port

20

USB-DP

Two way

USB data is positive

21

GND

Ground

Ground

22

GND

Ground

Ground

23

PIO(0)

Two way

Programmable input/output port (0)

24

PIO(1)

Two way

Programmable input/output port (1)

25

PIO(2)

Two way

Programmable input/output port (2)

26

PIO(3)

Two way

Programmable input/output port (3)

27

PIO(4)

Two way

Programmable input/output port (4)

28

PIO(5)

Two way

Programmable input/output port (5)

29

PIO(6)

Two way

Programmable input/output port (6)

30

PIO(7)

Two way

Programmable input/output port (7)

31

PIO(8)

Output

Status indicator LED port 1

32

PIO(9)

Output

Status indicator LED port 2

33

PIO(10)

Two way

Programmable input/output port (10)

34

PIO(11)

Input

Module state switching pin,

High level -> AT command responds to working

status;

Low level or floating -> Bluetooth normal working

status.

10. Dimensions:

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11. Serial port module pin definition:

1. PIO(8) connects to the LED to indicate the working status of the module. The
module flashes after power-on, and the different states flash differently.

2. PIO (9) is connected to the LED to indicate that the module is successfully
connected. After the Bluetooth serial port is successfully connected, the LED is on.

3. PIO (11) module state switching pin, high level --> AT command response working
state, low level or floating --> Bluetooth normal working state.

4. The reset circuit is already on the module and reset when the power is turned
back on.

12. Steps to set the master mode:

1. PIO (11) is set high.

2. Upon power-on, the module enters the AT command response state.

3. HyperTerminal or other serial port tool, set baud rate 38400, data bit 8 bits, stop
bit 1 bit, no parity bit,
No flow control.

4. The serial port sends the character "AT+ROLE=1\r\n" and successfully returns
"OK\r\n", where \r\n is a carriage return line feed.

5. PIO (11) is de-asserted, re-powered, the module is the main module, and the slave
module is automatically searched to establish a connection.

13. LAYOUT considerations

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1. BLK-MD-HC-05 Bluetooth module serial port level needs 3.3V, if you connect with
5V level system, you need to add level conversion chip.

2. Bluetooth signals are greatly affected by the surrounding, such as trees, metal,
walls and other obstacles will absorb or shield the Bluetooth signal, so it is not
recommended to install in the metal casing.

3. Since the metal will weaken the antenna function, it is recommended that when
the module is given to the Lay board, the ground under the module antenna should
not be laid and routed. It is best to hollow out.

AT instruction set

The BLK-MD-HC-05 embedded Bluetooth serial communication module has two
working modes: command response working mode and automatic connection
working mode. In the automatic connection working mode, the module can be
divided into master, slave and loopback three working roles.
When the module is in the automatic connection working mode, it will automatically
transfer data according to the preset setting; when the module is in the command
response working mode, it can execute all the AT commands described below, and
the user can send various AT commands to the module as modules. Set control
parameters or issue control commands. The dynamic conversion of the module's
operating state can be achieved by controlling the input level of the module's
external pin (PIO11).

The pin definition used by the serial port module:

1. PIO8 is connected to the LED to indicate the working status of the module. The
module flashes after power-on, and the different states flash differently.

2. PIO9 is connected to the LED to indicate that the module is successfully connected.
After the Bluetooth serial port is successfully connected, the LED is on.

3. PIO11 module status switching pin, high level --> AT command response working
status, low level or floating --> Bluetooth routine
State.

4. The reset circuit is already on the module and reset when the power is turned
back on.

Steps to set up as the main module:

1. PIO11 is set high.

2. Upon power-on, the module enters the AT command response state.

3. HyperTerminal or other serial port tool, set baud rate 38400, data bit 8 bits, stop
bit 1 bit, no parity bit,
No flow control.

4. The serial port sends the character "AT+ROLE=1\r\n" and successfully returns
"OK\r\n", where \r\n is a carriage return line feed.

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Command

Response

Parameter

ATOK/

Command

Response

Parameter

AT+RESET

OK

/

Command

Response

Parameter

AT+VERSION?

+VERSION:<Param>

OK

Param: Software version

number

Command

Response

Parameter

AT+ORGL

OK

/

Command

Response

Parameter

AT+ADDR?

+ADDR:<Param>

OK

Param: Bluetooth address

5. PIO is set low, power is turned back on, the module is the main module, and the
slave module is automatically searched to establish a connection.

Detailed instructions

(AT commands are not case sensitive and end with carriage return, newline
characters: \r\n)

1. Test instructions:

2. Module reset (restart):

3. Obtain the software version number:

for example:
At+version?\r\n
+VERSION:2.0-20100601
OK

4. Restore default state:

Factory default state:

1. Equipment class: 0

2. Search code: 0x009e8b33

3. Module Job Role: Slave Mode

4. Connection mode: Specify the dedicated Bluetooth device connection mode

5. Serial Port Parameter: Baud Rate - 38400bits/s; Stop Bit: 1 bit; Check Digit: /

6. Pairing code: "1234"

7. Equipment name: "H-C-2010-06-01"

... ...

5. Get module Bluetooth address:

Bluetooth address representation method: NAP: UAP: LAP (hexadecimal)
for example:

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