HC05 User Manual

User Manual:

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HC-05
-Bluetooth to Serial Port Module

Overview

HC-05 module is an easy to use Bluetooth SPP (Serial Port Protocol) module, designed for
transparent wireless serial connection setup.
Serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps
Modulation with complete 2.4GHz radio transceiver and baseband. It uses CSR Bluecore
04-External single chip Bluetooth system with CMOS technology and with AFH(Adaptive
Frequency Hopping Feature). It has the footprint as small as 12.7mmx27mm. Hope it will simplify
your overall design/development cycle.

Specifications
Hardware features
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Typical -80dBm sensitivity
Up to +4dBm RF transmit power
Low Power 1.8V Operation ,1.8 to 3.6V I/O
PIO control
UART interface with programmable baud rate
With integrated antenna
With edge connector

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Software features
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Default Baud rate: 38400, Data bits:8, Stop bit:1,Parity:No parity, Data control: has.
Supported baud rate: 9600,19200,38400,57600,115200,230400,460800.
Given a rising pulse in PIO0, device will be disconnected.
Status instruction port PIO1: low-disconnected, high-connected;
PIO10 and PIO11 can be connected to red and blue led separately. When master and slave
are paired, red and blue led blinks 1time/2s in interval, while disconnected only blue led
blinks 2times/s.
Auto-connect to the last device on power as default.
Permit pairing device to connect as default.
Auto-pairing PINCODE:”0000” as default
Auto-reconnect in 30 min when disconnected as a result of beyond the range of connection.

Hardware

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HC-05 Bluetooth module

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06.18.2010

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HC-05 Bluetooth module

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AT command Default:
How to set the mode to server (master):
1. Connect PIO11 to high level.
2. Power on, module into command state.
3. Using baud rate 38400, sent the “AT+ROLE=1\r\n” to module, with “OK\r\n”
means setting successes.
4. Connect the PIO11 to low level, repower the module, the module work as server
(master).
AT commands: (all end with \r\n)
1. Test command:
Command

Respond

Parameter

AT

OK

-

Command

Respond

Parameter

AT+RESET

OK

-

Command

Respond

Parameter

AT+VERSION?

+VERSION:
OK

Param : firmware version

2. Reset

3. Get firmware version

Example:
AT+VERSION?\r\n
+VERSION:2.0-20100601
OK

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4. Restore default
Command

Respond

Parameter

AT+ORGL

OK

-

Default state:
Slave mode, pin code :1234, device name: H-C-2010-06-01 ,Baud 38400bits/s.
5. Get module address
Command

Respond

Parameter

AT+ADDR?

+ADDR:
OK

Param: address of Bluetooth
module

Bluetooth address: NAP: UAP : LAP
Example:
AT+ADDR?\r\n
+ADDR:1234:56:abcdef
OK
6. Set/Check module name:
Command

Respond

Parameter

AT+NAME=

OK

AT+NAME?

+NAME:
OK (/FAIL)

Param: Bluetooth
name
(Default :HC-05)

module

Example:
AT+NAME=HC-05\r\n
set the module name to “HC-05”
OK
AT+NAME=ITeadStudio\r\n
OK
AT+NAME?\r\n
+NAME: ITeadStudio
OK
7. Get the Bluetooth device name:
Command

Respond

Parameter

AT+RNAME?

1. +NAME:
OK
2. FAIL

Param1,Param 2 : the address
of Bluetooth device

Example: (Device address 00:02:72:od:22:24，name：ITead)
AT+RNAME? 0002，72，od2224\r\n
+RNAME:ITead
OK
8. Set/Check module mode:
Command

Respond

Parameter

AT+ROLE=

OK

AT+ ROLE?

+ROLE:

Param:
0- Slave

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OK

1-Master
2-Slave-Loop

Command

Respond

Parameter

AT+CLASS=

OK

Param: Device Class

AT+ CLASS?

1. +CLASS:
OK
2. FAIL

9. Set/Check device class

10. Set/Check GIAC (General Inquire Access Code)
Command

Respond

Parameter

AT+IAC=

1.OK
2. FAIL

Param: GIAC
(Default : 9e8b33)

AT+IAC

+IAC:
OK

Example:
AT+IAC=9e8b3f\r\n
OK
AT+IAC?\r\n
+IAC: 9e8b3f
OK
11. Set/Check -- Query access patterns
Command

Respond

Parameter

AT+INQM=,,


1.OK
2. FAIL

AT+ INQM?

+INQM ： ,,

OK

Param:
0——inquiry_mode_standard
1——inquiry_mode_rssi
Param2: Maximum number of
Bluetooth devices to respond
to
Param3:
Timeout (1-48 : 1.28s to
61.44s)

Example:
AT+INQM=1,9,48\r\n
OK
AT+INQM\r\n
+INQM:1, 9, 48
OK

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12. Set/Check PIN code:
Command

Respond

Parameter

AT+PSWD=

OK

AT+ PSWD?

+ PSWD
OK

Param: PIN code
(Default 1234)

：

13. Set/Check serial parameter:
Command

Respond

Parameter

AT+UART=,,<
Param3>

OK

AT+ UART?

+UART=,,

OK

Param1: Baud
Param2: Stop bit
Param3: Parity

Example:
AT+UART=115200，1,2,\r\n
OK
AT+UART?
+UART:115200,1,2
OK
14. Set/Check connect mode:
Command

Respond

Parameter

AT+CMODE=

OK

AT+ CMODE?

+ CMODE:
OK

Param:
0 - connect fixed address
1 - connect any address
2 - slave-Loop

Command

Respond

Parameter

AT+BIND=

OK

AT+ BIND?

+ BIND:
OK

Param: Fixed address
(Default
00:00:00:00:00:00)

Command

Respond

Parameter

AT+POLAR=

OK

AT+ POLAR?

+ POLAR=,
OK

Param1:
0- PIO8 low drive LED
1- PIO8 high drive LED

15. Set/Check fixed address:

Example:
AT+BIND=1234，56，abcdef\r\n
OK
AT+BIND?\r\n
+BIND:1234:56:abcdef
OK
16. Set/Check LED I/O

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Param2:
0- PIO9 low drive LED
1- PIO9 high drive LED

17. Set PIO output
Command

Respond

Parameter

AT+PIO=,

OK

Param1: PIO number
Param2: PIO level
0- low
1- high

Example:
1. PIO10 output high level
AT+PI0=10，1\r\n
OK
18. Set/Check – scan parameter
Command

Respond

Parameter

AT+IPSCAN=,,,

OK

AT+IPSCAN?

+IPSCAN:,,
,
OK

Param1: Query time
interval
Param2：Query duration
Param3：Paging interval
Param4：Call duration

Example:
AT+IPSCAN =1234,500,1200,250\r\n
OK
AT+IPSCAN?
+IPSCAN:1234,500,1200,250

19. Set/Check – SHIFF parameter
Command

Respond

Parameter

AT+SNIFF=,,
,

OK

AT+ SNIFF?

+SNIFF:,,,
OK

Param1: Max time
Param2: Min time
Param3: Retry time
Param4: Time out

20. Set/Check security mode
Command

Respond

Parameter

AT+SENM=,

1. OK
2. FAIL

AT+ SENM?

+ SENM:,

Param1:
0——sec_mode0+off
1——sec_mode1+non_se

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OK

cure
2——sec_mode2_service
3——sec_mode3_link
4——sec_mode_unknow
n
Param2:
0——hci_enc_mode_off
1——hci_enc_mode_pt_t
o_pt
2——hci_enc_mode_pt_t
o_pt_and_bcast

21. Delete Authenticated Device
Command

Respond

Parameter

AT+PMSAD=

OK

Param:
Authenticated
Address

Device

Example:
AT+PMSAD =1234,56,abcdef\r\n
OK
22. Delete All Authenticated Device
Command

Respond

Parameter

AT+ RMAAD

OK

-

Command

Respond

Parameter

AT+FSAD=

1. OK
2. FAIL

Param: Device address

23. Search Authenticated Device

24. Get Authenticated Device Count
Command

Respond

Parameter

AT+ADCN?

+ADCN：
OK

Param: Device Count

25. Most Recently Used Authenticated Device
Command

Respond

Parameter

AT+MRAD?

+ MRAD：
OK

Param:
Authenticated
Address

Recently
Device

26. Get the module working state
Command
HC-05 Bluetooth module

Respond
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Parameter
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AT+ STATE?

+ STATE：
OK

Param:
“INITIALIZED”
“READY”
“PAIRABLE”
“PAIRED”
“INQUIRING”
“CONNECTING”
“CONNECTED”
“DISCONNECTED”
“NUKNOW”

Command

Respond

Parameter

AT+INIT

1. OK
2. FAIL

-

Command

Respond

Parameter

AT+INQ

+INQ:  ，  ，

….
OK

Param1：Address
Param2：Device Class
Param3 ： RSSI Signal
strength

27. Initialize the SPP profile lib

28. Inquiry Bluetooth Device

Example:
AT+INIT\r\n
OK
AT+IAC=9e8b33\r\n
OK
AT+CLASS=0\r\n
AT+INQM=1,9,48\r\n
At+INQ\r\n
+INQ:2:72:D2224,3E0104,FFBC
+INQ:1234:56:0,1F1F,FFC1
+INQ:1234:56:0,1F1F,FFC0
+INQ:1234:56:0,1F1F,FFC1
+INQ:2:72:D2224,3F0104,FFAD
+INQ:1234:56:0,1F1F,FFBE
+INQ:1234:56:0,1F1F,FFC2
+INQ:1234:56:0,1F1F,FFBE
+INQ:2:72:D2224,3F0104,FFBC
OK
28. Cancel Inquiring Bluetooth Device
Command

Respond

Parameter

AT+ INQC

OK

-

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29. Equipment Matching
Command

Respond

Parameter

AT+PAIR=,

1. OK
2. FAIL

Param1：Device Address
Param2：Time out

Command

Respond

Parameter

AT+LINK=

1. OK
2. FAIL

Param：Device Address

Command

Respond

Parameter

AT+DISC

1. +DISC:SUCCESS
OK
2. +DISC:LINK_LOSS
OK
3. +DISC:NO_SLC
OK
4. +DISC:TIMEOUT
OK
5. +DISC:ERROR
OK

Param：Device Address

Command

Respond

Parameter

AT+ENSNIFF=

OK

Param：Device Address

Command

Respond

Parameter

AT+ EXSNIFF =

OK

Param：Device Address

30. Connect Device

Example:
AT+FSAD=1234,56,abcdef\r\n
OK
AT+LINK=1234,56,abcdef\r\n
OK
31. Disconnect

32. Energy-saving mode

33. Exerts Energy-saving mode

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Revision History
Rev.

Description

Release date

v1.0

Initial version

7/18/2010

HC-05 Bluetooth module

iteadstudio.com

06.18.2010
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