banggood HC-05 User Manual

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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

ACL No traffic

Master

115.2

4.60

ACL With file transfer

Master

115.2

10.3

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

ACL 1.28s sniff

Slave

38.4

0.42

SCO HV3 30ms sniff

Master

38.4

19.8

SCO HV3 30ms sniff

Slave

38.4

19.0

Standby Host connection

38.4

µA

7. Functional block diagram:

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8. Application circuit diagram:

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NAME

TYPE

Function

UART-TX

CMOS output

Serial data output

UART-RX

CMOS input

Serial data input

UART-CTS

CMOS input

Serial port clear send

UART-RTS

CMOS output

Serial port request to send

PCM-CLK

Two way

PCM clock

PCM-OUT

CMOS output

PCM data output

PCM-IN

CMOS input

PCM data input

PCM-SYNC

Two way

PCM data synchronization

AIO(0)

Two way

Programmable analog input and output

AIO(1)

Two way

Programmable analog input and output

RESETB

CMOS input

Reset/reset button

3.3V

power input

+3.3V power supply

GND

Ground

Output

NC (please hang)

USB-DN

Two way

USB data negative

9. Pin function description:

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SPI-CSB

CMOS input

SPI chip select

SPI-MOSI

CMOS input

SPI data input

SPI-MISO

CMOS output

SPI data output

SPI-CLK

CMOS input

SPI clock port

USB-DP

Two way

USB data is positive

GND

Ground

GND

Ground

PIO(0)

Two way

Programmable input/output port (0)

PIO(1)

Two way

Programmable input/output port (1)

PIO(2)

Two way

Programmable input/output port (2)

PIO(3)

Two way

Programmable input/output port (3)

PIO(4)

Two way

Programmable input/output port (4)

PIO(5)

Two way

Programmable input/output port (5)

PIO(6)

Two way

Programmable input/output port (6)

PIO(7)

Two way

Programmable input/output port (7)

PIO(8)

Output

Status indicator LED port 1

PIO(9)

Output

Status indicator LED port 2

PIO(10)

Two way

Programmable input/output port (10)

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

Command

Response

Parameter

AT+VERSION?

+VERSION:<Param>

Param: Software version

number

Command

Response

Parameter

AT+ORGL

Command

Response

Parameter

AT+ADDR?

+ADDR:<Param>

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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Command

Response

Parameter

AT+RNAME? <Param1>

1. +NAME:<Param2>

OK——Success

2. FAIL——Failure

Param1: Remote Bluetooth

device address

Param2: Remote Bluetooth

device address

Command

Response

Parameter

AT+ROLE=<Param>

Param:Parameter takes the

following values:

AT+ ROLE?

+ ROLE:<Param>

Command

Response

Parameter

AT+NAME=<Param>

Param:Bluetooth device name

Default name:"HC-05"

AT+NAME?

1. +NAME:<Param>

OK——Success

2. FAIL——Failure

The module Bluetooth device address is: 12:34:56:ab:cd:ef At+addr?\r\n +ADDR:1234:56:abcdef OK

6. Set/query device name:

E.g: AT+NAME=HC-05\r\n ——Set the module device name: "HC-05" OK AT+NAME="HC-05"\r\n - Set the module device name to "HC-05" OK At+name=Beijin\r\n ——Set the module device name: "Beijin" OK At+name="Beijin"\r\n - Set the module device name to "Beijin" OK At+name?\r\n +NAME: Bei jin OK

7. Get the remote Bluetooth device name:

Bluetooth address representation method: NAP: UAP: LAP (hexadecimal) E.g: The module Bluetooth device address is: 00:02:72:od:22:24, the device name is: Bluetooth At+rname? 0002,72,od2224\r\n +RNAME: Bluetooth OK

8. Setup / Query - Module Role:

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0 - from the role (Slave)

1 - Master role (Master)

2 - Loopback role

(Slave-Loop)

Default: 0

Command

Response

Parameter

AT+CLASS=<Param>

Param:Parameter takes the

following values:

Param: Equipment class

The Bluetooth device class is

actually a 32 bit

Parameter, the Parameter is

used to indicate the device

class

Type, and the type of service

supported.

Default: 0

AT+ CLASS?

1. + CLASS:<Param>

OK——Success

2. FAIL——Failure

Command

Response

Parameter

AT+IAC=<Param>

1. OK——Success

2. FAIL——Failure

Param: Query access code

Default: 9e8b33

See Appendix 2 for specific

settings: Query Access Code

Description

AT+ IAC?

+IAC:<Param>

Module role description: Slave - passive connection; Slave-Loop - passive connection, receiving remote Bluetooth master data and returning the data to the remote Bluetooth master as it is; Master - Query the surrounding SPP Bluetooth slaves and initiate a connection to establish a transparent data transmission channel between the master and slave Bluetooth devices.

9. Settings / Query - Device Class:

In order to effectively filter the surrounding Bluetooth devices, quickly query or query the custom Bluetooth device, the user can set the module to a non-standard Bluetooth device class, such as: 0x1f1f (hexadecimal).

10. Device / Query - Query Access Code:

The access code is set to GIAC (General Inquire Access Code: 0x9e8b33) general query access code, which can be used Discovered or found all Bluetooth devices around; in order to efficiently query or be queried in many Bluetooth devices around Customize the Bluetooth device, the user can set the module query access code to a number other than GIAC and LIAC, such as: 9e8b3f. Example:

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Command

Response

Parameter

AT+INQM=<Param>,<Param2>,

1. OK——Success

2. FAIL——Failure

Param: Query mode

0—inquiry_mode_standard

1——inquiry_mode_rssi

Param2: Maximum number

of Bluetooth device

Responses

Param3: Maximum query

timeout

Timeout range: 1 to 48

(recombination time: 1.28

seconds to 61.44 seconds)

Default: 1, 1, 48

AT+ INQM?

+INQM:<Param>,<Param2>,

Command

Response

Parameter

AT+PSWD=<Param>

Param: Pairing code

Default name:"1234"

AT+ PSWD?

+ PSWD :<Param>

Command

Response

Parameter

AT+UART=<Param>,<Param2>,<Param3>

Param1: baud rate

(bits/s)

The values are as

follows (decimal):

4800

9600

19200

AT+ UART?

+UART=<Param>,<Param2>,

AT+IAC=9e8b3f\r\n OK AT+IAC?\r\n +IAC: 9e8b3f OK

11. Settings / Query - Query Access Mode:

Example: AT+INQM=1,9,48\r\n——Query mode setting: with RSSI signal strength indication, more than 9 Bluetooth devices Response To terminate the query, set the timeout to 48xl. 28=61.44 seconds. OK AT+INQM\r\n +INQM: 1, 9, 9, 48 OK

12. Settings / Query - Pairing Code:

13. Setup / Query - Serial Parameters:

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38400

57600

115200

23400

460800

921600

1382400

Param2: stop bit

0 - 1 bit

1 - 2 digits

Param3: check

digit

0——None

1 - Odd

2——Even

Default setting:

9600, 0, 0

Command

Response

Parameter

AT+CMODE=<Param>

Param:

0 - specify the Bluetooth

address connection mode

(Specify the Bluetooth address

set by the binding Command)

1——any Bluetooth address

connection mode

(not bound by the address set

by the bound Command)

2 - Loopback role

(Slave-Loop)

Default connection mode: 0

AT+ CMODE?

+ CMODE:<Param>

Command

Response

Parameter

AT+BIND=<Param>

Param - Bind Bluetooth

address

AT+ BIND?

+ BIND:<Param>

Example: Set the serial port baud rate: 115200, 2 stop bits, Even check AT+UART=115200,1,2,\r\n OK AT+UART? +UART: 115200, 1, 2 OK

14. Settings / Query - Connection Mode:

15. Set / Query - Bind Bluetooth Address: Bluetooth address representation method: NAP: UAP: LAP (hexadecimal)

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Default binding Bluetooth

address:

00:00:00:00:00:00

Command

Response

Parameter

AT+POLAR=<Param1>，

Param1: The value is as

follows

0——PI08 output low level

LED

1——PI08 output high level

LED

Param2: The value is as

follows

0——PI09 output low level

indicates connection Success

1——PI09 output high level

indicates connection Success

Default setting: 1,1

AT+ BIND?

+ POLAR=<Param1>，

Command

Response

Parameter

Bluetooth address representation method: NAP: UAP: LAP (hexadecimal) Binding Command is only valid when the Bluetooth address connection mode is specified! for example: In the specified Bluetooth address connection mode, bind the Bluetooth device address: 12:34:56:ab:cd:ef The command and Response are as follows: AT+BIND=1234,56,abcdef\r\n OK AT+BIND?\r\n +BIND:1234:56:abcdef OK

16. Setup / Query - LED indicates drive and connection status output polarity:

HC-05 Bluetooth module definition: PI08 output drive LED indicates working status; PI09 output indicates connection status. for example: PI08 output low level LED, PI09 output high level indicates connection Success. The command and Response are as follows: AT+POLAR=0,1\r\n OK AT+POLAR?\r\n +POLAR=0,1 OK

17. Set PIO single port output:

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AT+PIO=<Param1>，

Param1: PIO port number

(decimal number)

Param2: PIO port output status

0——low level

1 - high level

Command

Response

Parameter

AT+MPIO=<Param>

Param: PIO port serial number

mask combination (decimal

number)

The HC-05 Bluetooth module provides users with PIO port resources: PI00~PI07 and PI010, which users can use to expand the input. Output port. for example:

1. PI010 port output high level AT+PI0=10,1\r\n OK

2. PI010 port output high level AT+PI0=10,0\r\n OK

18. Set PIO multiport output:

The HC-05 Bluetooth module provides users with PIO port resources: PI00~PI07 and PI010, which can be used by the user to expand the input. Output port. PIO port number mask = (1<< port number) PIO port number mask combination = (PIO port number mask 1 | PIO port number mask 2 | ⋯ ⋯ ) Such as: PI02 port mask = (1<<2) =0x004 PI010 port mask = (1<<10)=0x400 PI02 and PI010 port mask combination = (0x004|0x400) = 0x404 for example:

1. PI010 and PI02 port output high level AT+MPI0=404\r\n OK

2. PI04 port output high level AT+PI0=004\r\n OK

3. PI010 port output high level AT+PI0=400\r\n OK

4. All ports output low level AT+MPI0=0\r\n OK

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Command

Response

Parameter

AT+IPSCAN=<Param1>，

<Param2>，

AT+IPSCAN?

+IPSCAN: <Param1>，

<Param2>，

Param1: Query interval

Param2: Query duration

Param3: paging interval

Param4: paging duration

The above Parameters are all

decimal numbers.

Default: 1024, 512, 1024, 512

Command

Response

Parameter

AT+SNIFF=<Param1>，

<Param2>，

Param1: maximum time

Param2: minimum time

Param3: Try time

Param4: Timeout

The above Parameters are all

decimal numbers.

Default: 0,0,0,0

AT+IPSCAN?

+SNIFF: <Param1> ，

<Param2> ，

Command

Response

Parameter

AT+SENM=<Param>,<Param2>,

1. OK——Success

2. FAIL——Failure

Param: Safe mode, the values are

as follows:

Command

Response

Parameter

AT+MPIO?

+MPIO:<Param>

Param - PIO port value

(16bits)

Param[0]=PI00

Param[1]=PI01

Param[2]=PI02

⋯ ⋯

Param[10]=PI010

Param[11]=PI011

19. Query PIO port input:

The HC-05 Bluetooth module provides users with PIO port resources: PI00~PI07 and

PI010~PI011, which can be used by the user to expand the input and output ports.

20. Settings / Query - Page Scan, Query Scan Parameters:

for example: At+ipscan=1234,500,1200,250\r\n OK At+ipscan? +IPSCAN: 1234, 500, 1200, 250

21. Settings / Query - SHIFF energy saving parameters:

22. Set/Query Security and Encryption Mode:

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0--sec_mode0+off

1--sec_mode1+non_secure

2--sec_mode2_service

3--sec_mode3_link

4--sec_mode_unknown

Param2 encryption mode, the

values are as follows:

0--hci_enc_mode_off

1--hci_enc_mode_pt_to_pt

2--hci_enc_mode_pt_to_pt_and_b

cast

Default: 0,0

AT+ SENM?

SENM:<Param>,<Para

m2>,

Command

Response

Parameter

AT+PMSAD=<Param>

Param: Bluetooth device

address

Command

Response

Parameter

AT+RMAAD

Command

Response

Parameter

AT+FSAD=<Param>

1. OK——Success

2. FAIL——Failure

Param: Bluetooth device

address

23. Remove the specified authentication device from the Bluetooth pairing list:

for example: Remove the device with the Bluetooth address: 12:34:56:ab:cd:ef from the pairing list At+rmsad=1234,56,abcdef\r\n OK - delete Success or At+rmsad=1234,56,abcdef\r\n FAIL - 12:34:56:ab:cd:ef Bluetooth device does not exist in the pairing list

24. Remove all Authenticated Devices from the Bluetooth pairing list:

for example: Remove all Bluetooth devices from the pairing list At+rmaad\r\n OK

25. Find the specified authentication device from the Bluetooth pairing list:

for example: Find Bluetooth devices from the pairing list: 12:34:56:ab:cd:ef At+fsad=1234,56,abcdef\r\n OK - There is a 12:34:56:ab:cd:ef Bluetooth device in the pairing list. At+fsad=1234,56,abcde0\r\n FAIL - There is no 12:34:56:ab:cd:e0 Bluetooth device in the pairing list.

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Command

Response

Parameter

AT+ADCN?

+ADCN:<Param>

Param: Number of Bluetooth

devices in the pairing list

Command

Response

Parameter

AT+MRAD?

+ MRAD :<Param>

Param: Recently used

Bluetooth device address

Command

Response

Parameter

AT+STATE?

+ STATE:<Param>

Param: module working status

The return value is as follows:

"INITIALIZED"--initial state

"READY" - ready state

"PAIRABLE" - pairable status

"PAIRED" - pairing status

"INQUIRING" - query status

"CONNECTING" - the

connection status

"CONNECTED" - connection

status

"DISCONNECTED" -

disconnected state

"NUKNOW" - unknown state

26. Obtain the number of authenticated devices in the Bluetooth pairing list:

for example: At+adcn? +ADCN: 0 - no Bluetooth device in the pairing trust list OK

27. Obtain the most recently used Authenticated Device:

for example: At+mrad? +MRAD: 0:0:0 - no trusted Bluetooth devices have been used recently OK

28. Get the working status of the Bluetooth module:

for example: At+state? +STATE:INITIALIZED - Initialization state

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Command

Response

Parameter

AT+INIT

1. OK——Success

2. FAIL——Failure

Command

Response

Parameter

AT+INQ

+INQ: <Param1>, <Param2>,

<Param3>,

⋯⋯

Param1: Bluetooth address

Param2: device class

Param3: RSSI signal strength

29. Initialize the SPP specification library:

30. Query Bluetooth devices:

Example 1: At+init\r\n - Initialize the SPP library (cannot be initialized repeatedly) OK At+iac=9e8b33\r\n - Query the Bluetooth device of any access code OK At+class=0\r\n - query various Bluetooth device classes At+inqm=1,9,48\r\n ——Query mode: with RSSI signal strength indication, more than 9 Bluetooth devices Response will terminate the query, set the super The time is 48x1.28=61.44 seconds. At+inq\r\n - Query peripheral Bluetooth devices +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

Example 2: At+iac=9e8b33\r\n - Query the Bluetooth device of any access code OK At+class=1f1f\r\n - Query the Bluetooth device with device class 0x1f1f OK At+inqm=1,9,48\r\n ——Query mode: with RSSI signal strength indication, more than 9 Bluetooth devices Response will terminate the query, set the super The time is 48x1.28=61.44 seconds. At+inq\r\n - Filter. Query peripheral Bluetooth devices +INQ: 1234:56:0,1F1F, FFC2

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Command

Response

Parameter

AT+INQC

Command

Response

Parameter

AT+PAIR=<Param1>,<Param2>

1. OK——Success

2. FAIL——Failure

Param1: Remote device

Bluetooth address

Param2: Connection timeout

(seconds)

Command

Response

Parameter

AT+LINK=<Param>

1. OK——Success

2. FAIL——Failure

Param: Remote device

Bluetooth address

+INQ: 1234:56:0,1F1F,FFC1 +INQ: 1234:56:0,1F1F,FFC1 +INQ: 1234:56:0,1F1F,FFC1 +INQ: 1234:56:0,1F1F, FFC2 +INQ: 1234:56:0,1F1F,FFC1 +INQ: 1234:56:0,1F1F,FFC1 +INQ:1234:56:0,1F1F,FFC0 +INQ: 1234:56:0,1F1F, FFC2 OK

Example 3: At+iac=9e8b3f\r\n ——Query the Bluetooth device with access code 0x9e8b3f OK At+class=1f1f\r\n - Query the Bluetooth device with device class 0x1f1f OK At+inqm=1,1,20\r\n ——Query mode: with RSSI signal strength indication, more than 1 Bluetooth device Response will terminate the query, set the super The time is 20x1.28=25.6 seconds. At+inq\r\n - Filter. Query peripheral Bluetooth devices +INQ:1234:56:ABCDEF,1F1F,FFC2 OK

31. Cancel the inquiry of Bluetooth devices:

32. Device pairing:

for example: Paired with a remote Bluetooth device: 12:34:56:ab:cd:ef, the maximum pairing timeout is 20 seconds. At+pai=1234,56,abcdef,20\r\n OK

33. Equipment connection:

for example: Establish a connection with the remote Bluetooth device: 12:34:56:ab:cd:ef

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Command

Response

Parameter

AT+DISC

1. +DISC:SUCCESS - Disconnect Success

2. +DISC: LINK_LOSS - connection lost

3. +DISC: NO_SLC - no SLC connection

4. +DISC: TIMEOUT - disconnect timeout

5. +DISC:ERROR - disconnect error

Command

Response

Parameter

AT+ENSNIFF=<Param>

Param: Device Bluetooth

address

Command

Response

Parameter

AT+EXSNIFF=<Param>

Param: Device Bluetooth

address

error_code (hexadecimal number)

Comment

AT command error

Command result is the default value

PSKEY write error

Device name is too long (more than 32 bytes)

Device name length is zero

Bluetooth address: NAP is too long

Bluetooth address: UAP is too long

Bluetooth address: LAP is too long

PIO sequence number mask length is zero

Countless PIO serial numbers

At+fsad=1234,56,abcdef\r\n——Query whether the Bluetooth device 12:34:56:ab:cd:ef is in the pairing list OK At+link=1234,56,abcdef\r\n——Query the Bluetooth device 12:34:56:ab:cd:ef in the pairing list, you can connect directly without query. OK

34. Disconnect:

35. Enter the energy saving mode:

36. Exit the energy saving mode:

Appendix 1: ATCommand Error Code Description

Error code return form - ERROR: (error_code)

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Device class length is zero

Device class number is too long

Query access code length is zero

The query access code number is too long

Invalid query access code

Pairing code length is zero

Pairing code is too long (more than 16 bytes)

Module role is invalid

Invalid baud rate

Invalid stop bit

Check digit is invalid

No authentication device exists in the pairing

list

SPP library is not initialized

SPP library repeated initialization

Invalid query mode

Query timeout too large

Bluetooth address is zero

Invalid security mode

Invalid encryption mode

Appendix 2: Device Class Description

The Class of Device/Service(COD)is a 32 bifs number that of 3 field specifies the service supported by the device. Another field spcifies the minor device class, which descrbes the device type in more detail The Class of Device /Service (CoD) field has a variable format. The format is indicated using the ’within the CoD .The length of the Format Type field is variable and ends with two bits different from’11’.The version field starts at the least significant bit of the CoD and may extend upwards. In the ’format#1’ of the CoD (format Type field =00), 11 bits are assigned as a bit –mask(mulfiple bits can be set) each bit corresponding to a high level generic category of service class. Currently 7 categories are defined. These are primarily of a’ public service’ nature. The remaining 11 bits are used to indicate device type category and other device-specific characteristics. Any reserved but otherwise unassigned bits, such as in the Major Service Class field, should be to 0. Figure 1.2: The Class of Device/Service field (format type). Please note the krder in which the octets are sent on the air and stored in memory. Bit number 0 is sent first on the air .

1. MAJOR SERVICE CLASSES Bit no Major Service Class 13 Limited Discoverable Mode [Ref #1] 14 (reserved) 15 (reserved) 16 Positioning(Location identification)

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17 Networking (LAN,Ad hoc, ⋯ ) 18 Rendering (Printing ,Speaker,⋯ 19 Capturing (Scanner,Misrophone,⋯ 20 0bject Transfer (v-Inbox, v-Folder,⋯ 21 Audio (Speaker,Microphone,Headset service,⋯ 22 Telephony (Cordless telephony, Modem, Headset service,⋯ 23 Imformation (WEB-server, WAP- server,⋯ TABLE 1.2:MAJOR SERVICE CLASSES [Ref #1 As defined in See Generic Access Profile,Bluetooth SIG]

2. MAJOR DEVICE CLASSES The Major Class segment is the highest level of granularity for defining a Bluetooth Device. The main function of a device is used to determine the major Class grouping. There are 32 different possible major classes. The assignment of this Major Class field is defined in Table1.3. 1 2 1 1 1 0 9 8 Major Device Class 0 0 0 0 0 Miscel laneous [Ref #2] 0 0 0 0 1 Computer (desktop, notebook,PDA, organizers,⋯ 0 0 0 1 0 Phone (cellular ,cordless ,payphone,modem,⋯ 0 0 0 1 1 LAN/Network Access point 0 0 1 0 0 Audio/Video (headset,speaker,stereo, video display, vcr ⋯ 0 0 1 0 1 Periphereal (mouse, joystick, keyboards.⋯ 0 0 1 1 0 Imaging (printing, scanner, camera, display,⋯ 1 1 1 1 1 Uncategorized, specific device code not specified X X X X All other values reserved TABLE 1.3: MAJOE DEVICE CLASSES [Ref #2:Used where a more specific Major Device Class is not suited (but only as specifiedas in this document) .Devices that do not have a major class assigned can use the all-1 code until’ classified’]

3. THE MINOR DEVICE CLASS FIELD The’ Minor Device Class field’ (bits 7 to 2 in the CoD ), are to be interpreted only in the context of the Major Device Class (but interpreted of the Service Class field). Thus the meaning of the bits may change, depending on the value of the ’ Major Device Class field’. When the Minor Device Class field indicates a device class ,then the primary decvice class should be reported, e. g . a cellular phone that can work as a cordless handset should

4. MINOR DEVICE CLASS FIELD–COMPUTER MAJOR CLASS Minor Device Class 7 6 5 4 3 2 bit no of CoD 0 0 0 0 0 0 Uncategorized,code for device nof assigned 0 0 0 0 0 1 Desktop workstation 0 0 0 0 1 0 Server-class computer 0 0 0 0 1 1 Laptop 0 0 0 1 0 0 Handheld PC/PDA(clam shell) 0 0 0 1 0 1 Palm sized PC/PDA

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0 0 0 1 1 0 Wearable computer (Watch sized) X X X X X X All other values reserved TABLE 1.4: SUB DEVICE CLASS FIELD FOR THE’ COMPUTER ’MAJOR CLASS

5. MINOR DEVICE CLASS FIELD – PHONE MAJOR CLASS Minor Device Class 7 6 5 4 3 2 bit no of CoD 0 0 0 0 0 0 Uncategorized,code for device not assigned 000001 Cellular 0 0 0 0 1 0 Cordless 0 0 0 0 1 1 Smart phone 0 0 0 1 0 0 Wired modem or voice gateway 0 0 0 1 0 1 Common ISDN Access 0 0 0 1 1 0 Sim Card Reader X X X X X X All other values reserved TABLE1.5: SUB DEVICE CLASSES FOR THE’PHONE’ MAJOR CLASS

6. MINOR DEVICE CLASS FIELD –LAN/NETWORK ACCESS POINE MAJOR CLASS Minor Device Class 7 6 5 bit no of CoD 0 0 0 Fully available 0 0 1 1 – 17% utilized 0 1 0 1 7 - 33% utilized 0 1 1 3 3 – 50% utilized 1 0 0 5 0 – 67% utilized 1 0 1 6 7 – 83% utilized 1 1 0 8 3 – 99% utilized 1 1 1 No service available [REF #3] XXX All other values reserved TABLE1.6: THE LAN/NETWORK ACCESS POINE LOAD FACTOR FIELD [Ref #3:"Device is fully utilized and cannot accept additional connections at this time, please retry later"] The exact loading formula is not standardized. It is up to each LAN/Network Access Point implementation to determine what internal conditions to report as a utilization of communication requirement is that the box .As a recommendation, a client that locates multiple LAN/Network Access Points should attempt to connect to the one reporting the lowest load. Minor Device Class 4 3 2 bit no of CoD 0 0 0 Uncategorized (use this value if no other apply ) XXX All other values reserved TABLE1.7:RESERVED SUB-FIELD FOR THE LAN/NETWORK ACCESS POINE

7. MINOR DEVICE CLASS FIELD – AUDIO/VIDEO MAJOR CLASS Minor Device Class 7 6 5 4 3 2 bit no of CoD 0 0 0 0 0 0 Uncategorized,code not assigned

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0 0 0 0 0 1 Device conforms to the Headset profile 000010 Hands-free 0 0 0 0 1 1 (Reserved ) 0 0 0 1 0 0 Microphone 0 0 0 1 0 1 Loudspeaker 0 0 0 1 1 0 Headphones 0 0 0 1 1 1 Portable Audio 0 0 1 0 0 0 Car audio 0 0 1 0 0 1 Set-top box 0 0 1 0 1 0 HiFi Audio Device 001011 VCR 0 0 1 1 0 1 Camcorder 0 0 1 1 1 0 Video Monitor 0 0 1 1 1 1 Video Display and Loudspeaker 0 1 0 0 0 0 Video Conferencing 0 1 0 0 0 1 (Reserved) 0 1 0 0 1 0 Gaming/Toy [Ref #4] X X X X X X All other values reserved [Ret #4: Only to be used with a Gaming/Toy device that makes audio/video capabilities available via Bluetooth] TABLE 1.8: SUB DEVICES FOR THE ’AUDIO/VIOEO’MAJOR CLASS

8. MINOR DEVICE CLASS FIELD – PERIPHERAL MAJOR CLASS Minor Device Class 7 6 bit no of CoD 0 1 Keyboard 1 0 Pointing device 1 1 Combo keyboard /pointing device X X X All other values reserved TABLE1.9: THE PERIPHERAL MAJOR CLASS KEYBOARD/POINTING DEVICE FIELD Bits 6 and 7 independantly specify mouse, keyboard or combo mouse/keyboard devices. These may be combined with the lower bits in a multifunctional decice. Minor Device Class 5 4 3 2 bit no of CoD 0 0 0 0 Uncategorized device 0 0 0 1 Gamepd 0 0 1 1 Remote control 0 1 0 0 Sensing device 0 1 0 1 Digitizer tablet X X X X All other values reserved TABLE1.10: RESERVED SUB-FIELD FOR THE DEVICE TYPE

9. MINOR DEVICE CLASS FIELD – IMAGING MAJOR CLASS Minor Device Class

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7 6 5 4 bit no of CoD X X X 1 Display X X 1 X Camera X 1 X X Scanner 1 X X X Printer X X X X All other values reserved TABLE 1.11: THE TMAGING MAJOR CLASS BITS 7 TO 7 Bits 4 to 7 independent ly specify bi splay, camera, scanner or printer. These may be combined in a multifunctional device. Minor Device Class 3 2 bit no of CoD 0 0 Uncategorized, default X X All other values reserved TABLE 1. 12: THE IMAGING MAJOR CLASS BITS 2 AND 3 Bits 2 and 3 are reserved

Appendix 3: The Inquiry Access Codes

The General-and Device-Specific Inquiry Access Codes (DIACs) The Inquiry Access Code is the first level of filtering when finding Bluetooth The main purpose of defining multiple IACs is to limit the number of Reply that are received when scanning devices within range.

0. 0x9E8B33 -- General/Unlimited Inquiry Access Code (GIAC)

1. 0x9E8B00 - Limited Dedicated Inquiry Access Code (LIAC)

2. 0x9E8B01 ~ 0x9E8B32 RESERVED FOR FUTURE USE

3. 0x9E8B34 ~ 0x9E8B3F RESERVED FOR FUTURE USE The Limited Inquiry Access Code(LIAC)is only intended to be used for limited time Periods in scenarios where both are have been explicitly caused to enter this state, Usually by user action. For further explanation of the use of the LIAC, please refer To the Generic Access Profile. In contrast it is allowed to be continuously scanning for the General Inquiry Access Code (GIAC) and respond whenever inquired.

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