Firmtech FB100AS User manual

APPENDIX B
AT Command Language with Detailed Description and
Usage
Version 1.1
FIRMTECH Co., Ltd.
B-606, Ssangyong IT Twin Tower, Sangdaewon-dong, 442-5
Jungwon-gu, Seongnam-si, Gyeonggi-do, Korea 462-120
Tel : [phone]
Fax : [phone]
www.firmtech.co.kr

AT Command Language with Detailed Description and Usage Revision History
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Revision History
Revision Date Change Description
1.0 10-09-2007 Write a draft
1.1 15-12-2008
Add command
- AT+BTRSSI?
- AT+BTLQ?
- AT+BTFASTCH,n

AT Command Language with Detailed Description and Usage List of Contents
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List of Contents
1 Definition of Device ...........................................................................................................................................................5
1.1 HOST ............................................................................................................................................................................5
1.2 BT ...................................................................................................................................................................................5
1.3 Definition of SYMBOL ...........................................................................................................................................5
1.4 AT RESPONSE ...........................................................................................................................................................5
2 COMMAND CATEGORY ....................................................................................................................................................6
2.1 Classification depending on function.............................................................................................................6
3 Features of AT Commands ........................................................................................................................................... 10
3.1 AT ................................................................................................................................................................................ 10
3.2 ATZ ............................................................................................................................................................................. 10
3.3 AT&F .......................................................................................................................................................................... 10
3.4 AT+BTINFO? ........................................................................................................................................................... 10
3.5 AT+BTINFO?n ........................................................................................................................................................ 11
3.6 AT+BTINFODEV?n ................................................................................................................................................ 12
3.7 AT+BTCOUNT? ...................................................................................................................................................... 13
3.8 AT+BTRSSI? ............................................................................................................................................................. 13
3.9 AT+BTLQ? ................................................................................................................................................................ 14
3.10 +++ ......................................................................................................................................................................... 14
3.11 ATO .......................................................................................................................................................................... 14
3.12 ATOn ....................................................................................................................................................................... 14
3.13 AT+BTCANCEL ..................................................................................................................................................... 15
3.14 AT+BTSCAN ......................................................................................................................................................... 15
3.15 AT+BTSCAN,n,t0 ................................................................................................................................................. 16
3.16 AT+BTSCAN,123456789012,t0 ...................................................................................................................... 16
3.17 AT+BTINQ? ........................................................................................................................................................... 16
3.18 ATD .......................................................................................................................................................................... 17
3.19 ATD123456789012 ............................................................................................................................................ 17
3.20 ATH .......................................................................................................................................................................... 17
3.21 AT+BTLPM,n ......................................................................................................................................................... 18
3.22 AT+BTUART,b(baud rate),p(parity bit),s(stop bit) .................................................................................. 18
3.23 AT+BTSEC,n(Authentication),n(Encryption) ............................................................................................. 19
3.24 AT+BTMODE,n .................................................................................................................................................... 19
3.25 AT+BTOPMODE,n .............................................................................................................................................. 20
3.26 AT+BTMSG,n ........................................................................................................................................................ 20
3.27 AT+BTNAME=xxxxxxxxxxxx ............................................................................................................................ 21

AT Command Language with Detailed Description and Usage List of Contents
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3.28 AT+BTKEY=xxxxxxxxxxxx ................................................................................................................................. 21
3.29 AT+BTLT=nn ........................................................................................................................................................ 21
3.30 AT+BTSETGUI ....................................................................................................................................................... 22
3.31 AT+BTROLE=x ..................................................................................................................................................... 22
3.32 AT+BTDEV=n ....................................................................................................................................................... 22
3.33 AT+SETESC,nn ..................................................................................................................................................... 23
3.34 AT+SETDEBUG,nn .............................................................................................................................................. 23
3.35 AT+BTBUFF=nnn ................................................................................................................................................ 23
3.36 AT+BTADDR=123456789012 ........................................................................................................................ 24
3.37 AT+BTDUT ............................................................................................................................................................ 24
3.38 AT+BTDFU ............................................................................................................................................................ 24
3.39 AT+BTFASTCH,n .................................................................................................................................................. 25
4 Usage of AT Command Language ............................................................................................................................ 26
4.1 Setting Up 1 Slave ............................................................................................................................................... 28
4.2 Setting Up and Connecting Master ............................................................................................................. 29
4.3 How to Change PC Configuration through AT Command Language. .......................................... 31
4.4 How to Change PC Configuration through AT Command Language. .......................................... 32

AT Command Language with Detailed Description and Usage 1 Definition of Device
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Basically, the products of FIRMTECH Co., Ltd. supports AT command when the connection Mode is in MODE4.
However, for 1:N communication, AT command is used to control 1:N communication regardless of
Connection MODE.
1 Definition of Device
1.1 HOST
HOST refers to the devices which control the products of FIRMTECH Co., Ltd. through AT command.
1.2 BT
BT refers to the Bluetooth devices of FIRMTECH Co., Ltd.
1.3 Definition of SYMBOL
SYMBOL MEANING ASCII CODE
↵ Carriage Return 0x0D
∠ Carriage Return + Line Feed 0x0D + 0x0A
x Character
123456789012 Bluetooth Device Address
n One digit decimal number
t0 Timeout in second
<Table B-1 Symbol Table>
1.4 AT RESPONSE
BT will generate the response of “∠OK∠” when the AT command entered at the Host is executed normally
response of “∠ERROR∠” when it is not being executed normally, or in the status not executable or no
response may be generated in case of unreadable.
The basic response is processed in ASCII code and the response message depending on condition is as
followings.
Operation Status(AT+BTINFO?↵)
- ∠STANDBY∠ : AT command Stand-by Mode.
- ∠PENDING∠ : AT command some operation is being executed.
- ∠CONNECT∠ : Status being connected with Bluetooth device of the other party.
BT Status Message
- ∠BTWIN Slave mode start∠ : The state of power on BT
- ∠CONNECT 123456789012∠ : The state of connection of BT to other bluetooth device.
- ∠DISCONNECT∠ : The state of disconnection of BT from the other bluetooth device.

AT Command Language with Detailed Description and Usage 2 COMMAND CATEGORY
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2 COMMAND CATEGORY
2.1 Classification depending on function
Category No AT Command
Apply Products
1 2 3 4 5 6 7 8
1 AT↵ 1 2 3 4 5
RESET
2 ATZ↵ 1 2 3 4 5
3 AT&F↵ 1 2 3 4 5
INFORMATION
4 AT+BTINFO?↵ 1 2 3 4 5
5 AT+BTINFO?n↵ 1 2 3 4 5
6 AT+BTINFODEV?n↵ 123
7 AT+BTCOUNT?↵ 123
8 AT+BTRSSI?↵ 1 2 3 4
9 AT+BTLQ?↵ 1 2 3 4
CONNECTION
10 +++ 1 2 3 4
11 ATO↵ 1 2 3 4 5
12 ATOn↵ 123
13 AT+BTCANCEL↵ 1 2 3 4 5
14 AT+BTSCAN↵ 1 2 3 4 5
15 AT+BTSCAN,n,t0↵ 1 2 3 4 5
16 AT+BTSCAN,123456789012,t0↵ 1 2 3 4
17 AT+BTINQ?↵ 1 2 3 4 5
18 ATD↵ 1 2 3 4 5
19 ATD123456789012↵ 1 2 3 4 5
20 ATH↵ 1 2 3 4 5
SETTING
21 AT+BTLPM,n↵ 1 2 3 4 5
22 AT+BTUART,b(baud rate),p(parity bit),s(stop bit)↵ 1 2 3 4 5
23 AT+BTSEC,n(Authentication),n(Encryption)↵ 1 2 3 4 5
24 AT+BTMODE,n↵ 1 2 3 4

AT Command Language with Detailed Description and Usage 2 COMMAND CATEGORY
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25 AT+BTOPMODE,n↵ 123
26 AT+BTMSG,n↵ 1 2 3 4 5
27 AT+BTNAME=xxxxxxxxxxxx↵ 1 2 3 4 5
28 AT+BTKEY=xxxxxxxxxxxx↵ 1 2 3 4 5
29 AT+BTLT=nn↵ 1 2 3 4 5
30 AT+BTSETGUI↵ 1 2 3 4 5
31 AT+BTROLE=x↵ 1 2 3 4 5
32 AT+BTDEV=n↵ 123
33 AT+SETESC,nn↵ 1 2 3 4
34 AT+SETDEBUG,nn↵ 1 2 3 4
35 AT+BTBUFF=nnn↵ 123
36 AT+BTADDR=123456789012↵ 1 2 3 4
37 AT+BTDUT↵ 1 2 3 4 5
38 AT+BTDFU↵ 1 2 3 4 5
39 AT+BTFASTCH,n↵ 1 2 3 4
<Table B-2 AT Command Category>
1 - FB100AS
2 - FB200AS
3 - FB755AC, FB755AS
4 - FB155BC, FB155BS
5 - FB570AC, FB750AS
6 - RESERVED FOR FUTURE USE
7 - RESERVED FOR FUTURE USE
8 - RESERVED FOR FUTURE USE

AT Command Language with Detailed Description and Usage 2 COMMAND CATEGORY
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2.2 AT Command Language Usable by Status
No AT Command STANDBY PANDING 1:1
CONNECT
1:N
CONNECT BYPASS
1 AT↵ ⓐ ⓐ ⓐ ⓐ
2 ATZ↵ ⓐ ⓐ
3 AT&F↵ ⓐ
4 AT+BTINFO?↵ ⓐ ⓐ ⓐ ⓐ
5 AT+BTINFO?n↵ ⓐ ⓐ ⓐ ⓐ
6 AT+BTINFODEV?n↵ ⓝⓢ
7 AT+BTCOUNT?↵ ⓝⓢ
8 AT+BTRSSI?↵ ⓜ ⓐ
9 AT+BTLQ?↵ ⓜ ⓐ
10 +++ ⓐ
11 ATO↵ ⓜ
12 ATOn↵ ⓝⓢ
13 AT+BTCANCEL↵ ⓐ
14 AT+BTSCAN↵ ⓢ
15 AT+BTSCAN,n,t0↵ ⓢ
16 AT+BTSCAN,123456789012,t0↵ ⓢ
17 AT+BTINQ?↵ ⓜ
18 ATD↵ ⓜ
19 ATD123456789012↵ ⓜ
20 ATH↵ ⓜ
21 AT+BTLPM,n↵ ⓐ
22 AT+BTUART,b(baud
rate),p(parity bit),s(stop bit)↵ ⓐ
23 AT+BTSEC,n(Authentication),n(E
ncryption)↵ ⓐ
24 AT+BTMODE,n↵ ⓐ
25 AT+BTOPMODE,n↵ ⓐ

AT Command Language with Detailed Description and Usage 2 COMMAND CATEGORY
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26 AT+BTMSG,n↵ ⓐ
27 AT+BTNAME=xxxxxxxxxxxx↵ ⓐ
28 AT+BTKEY=xxxxxxxxxxxx↵ ⓐ
29 AT+BTLT=nn↵ ⓐ
30 AT+BTSETGUI↵ ⓐ
31 AT+BTROLE=x↵ ⓐ
32 AT+BTDEV=n↵ ⓐ
33 AT+SETESC,nn↵ ⓐ
34 AT+SETDEBUG,nn↵ ⓐ
35 AT+BTBUFF=nnn↵ ⓐ
36 AT+BTADDR=123456789012↵ ⓐ
37 AT+BTDUT↵ ⓐ
38 AT+BTDFU↵ ⓐ
39 AT+BTFASTCH,n↵ ⓐ
<Table B-3 AT Commands Usable By Status>
ⓐ : Common Command Language to both Master / Slave.
ⓜ : Command Language for Master only.
ⓢ : Command Language for Slave only
ⓝⓢ : Command Language usable for OPERATION MODE1 or OPERATION MODE2.

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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3 Features of AT Commands
3.1 AT
FEATURE To verify if the HOST is connected to BT properly.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
DESCRIPTION
If HOST and BT are connected properly, it will respond with “∠OK∠”.
If the connection is not made, no response is transmitted, or Abnormal text will be
transmitted.
EX HOST Æ BT : AT↵
BT Æ HOST : ∠OK∠
3.2 ATZ
FEATURE Have BT software reset.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE -
DESCRIPTION
The same effect as though the power of BT is re-authorized.
Other connection with other Bluetooth will be released, and all the jobs currently
performed will stop, including connection trial to Bluetooth or connection waiting to
Bluetooth.
Among the AT Command Languages, the Setting command language shall be
software reset by using this command after use.
3.3 AT&F
FEATURE To Reset the hardware.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
DESCRIPTION
This command language will give the same effects as the reset button is pressed in
the pc configuration mode.
After this command is used, all the values of PC Configuration shall change to
factory set value.
3.4 AT+BTINFO?
FEATURE To transmit the current status of BT to the Host.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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RESPONSE
∠STANDBY∠
∠PENDING∠
∠CONNECT∠
DESCRIPTION To transmit the current status of BT to the Host.
3.5 AT+BTINFO?n
FEATURE To transmit the PC Configuration values to Host required to operate the BT according
to the n value.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
0 ∠<DEVICE NAME>∠
1 ∠<PINCODE>,<AUTHENTICATION>,<ENCRYPTION>∠
2 ∠<REMOTE BD ADDRESS>∠
3 ∠<CONNECTION MODE>∠
4 ∠<STATUS MSG>,<POWER SAVE>,<LINK TIME>,<ESC CHAR>,<DEBUG CHAR>∠
5 ∠<BAUD RATE>,8,<PARITY BIT>,<STOP BIT>∠
6 ∠<ROLE>,<OPERATION MODE>∠
7 ∠<NUMBER OF DEVICE>,<BUFF SIZE>∠
8 ∠<LOCAL BD ADDRESS>∠
9 ∠<FIRMWARE VERSION>∠
10 ∠<BLUETOOTH VERSION>∠
11 ∠<IAC>,<CoD>∠
12 ∠<HARDWARE FLOW CONTROL>∠
13 ∠<CONNECTION DELAY TIME>∠
14 ∠<SUPPORT PROFILE>∠
15 ∠<SERVICE NAME>∠
16 ∠<STREAM SWITCHING FAST>∠
DESCRIPTION
The value transmitted to the Host depending on the n value is as follows.
n = 0 Transmit the name of device composed of letter code to the host.
n = 1
The set values related with security is printed out and the transmission
order is in priority of PINCODE, AUTHENTICATION, ENCRYPTION and the
value is classified with “,“ and the meaning of each value is as follows.
yPINCODE : The letter code under 12 digits
yAUTHENTICATION : 0 – DISABLED, 1 – ENABLED
yENCRYPTION : 0 – DISABLED, 1 - ENABLED
n = 2 The BT address of the most recently connected device is transmitted to
host.
n = 3 CONNECTION MODE: MODE1 ~ MODE4 is transmitted to the host.
n = 4 The set values related with other action is printed out and the
transmission order is in priority of TIMEOUT, ESCAPE CHARACTER,

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DEBUG CHARACTER and the value is classified with “,“ and the meaning
of each value is as follows.
ySTATUS MESSAGE : 0 – DISABLED, 1 – ENABLED
yPOWER SAVE : 0 – DISABLED, 1 – ENABLED
yLINK SUPERVISION TIMEOUT : 0 ~ 99 (sec)
yESCAPE CHARACTER : The set value of 16 decimal
yDEBUG CHARACTER : The set value of 16 decimal
n = 5
The set values related with UART is printed out and the transmission
order is in priority of BAUD RATE, DATA BIT, PARITY BIT, STOP BIT and the
value is classified with “,“ and the meaning of each value is as follows.
yBAUDRATE : 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200, 230400 (bps)
yDATA BIT : 8 bit Default
yPARITY BIT : n – none, o – odd, e – even
ySTOP BIT : 1 – one stop, 2 – two stop
n = 6
The transmission order to host is in priority of ROLE, OPERATION MODE
and the value is classified with “,“ and the meaning of each value is as
follows.
yROLE : MASTER or SLAVE
yOPERATION MODE : MODE0 ~ MODE2
n = 7
The transmission order to host is in priority of NUMBER OF
CONNECTION DEVICE, BUFF SIZE which are the 1:N set value and the
value is classified with “,“ and the meaning of each value is as follows.
yNUMBER OF CONNECTION DEVICE : 1 ~ 7
yBUFF SIZE : 0 ~ 999 (Byte)
n = 8 Transmit own BT Address to host.
n = 9 Transmit the firmware version to host.
n = 10 Transmit the BT Version to host.
EX HOST Æ BT : AT+BTINFO?0↵
BT Æ HOST : ∠BMx001v4.2.6∠
3.6 AT+BTINFODEV?n
FEATURE To transmit the BT address of MASTER connected to SLAVE to the Host during 1:N
communication.
APPLY PRODUCTS FB100AS, FB200AS, FB755
RESPONSE ∠123456789012∠
ESCRIPTION
It transmits the BT address of Master connected to Slave to the Host while 1:N
communication is being used.
The BT address will be transmitted in the order of connection represented by n value.

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The command language will be recognized properly when “LOW” signal is pressed at
MESSAGE CONTROL(CTS) RS-232 level and “HIGH” TTL level.
n = 1 BT address of Master connected as the first.
n = 2 BT address of Master connected as the second.
n = 3 BT address of Master connected as the third.
n = 4 BT address of Master connected as the fourth.
n = 5 BT address of Master connected as the fifth.
n = 6 BT address of Master connected as the sixth.
n = 7 BT address of Master connected as the seventh.
n = a BT address of all Masters connected to Slave
EX HOST Æ BT : AT+BTINFODEV?1↵
BT Æ HOST : ∠123456789012∠
3.7 AT+BTCOUNT?
FEATURE To transmit the number of Masters connected to Slave currently to the Host while
1:N communication is used.
APPLY PRODUCTS FB100AS, FB200AS, FB755
RESPONSE ∠1 ~ 7∠
DESCRIPTION
The command transmits the number of Masters connected to Slave currently to the
Host while 1:N communication is used.
The command language will be recognized properly when “LOW signal is pressed at
MESSAGE CONTROL(CTS) RS-232 level and “HIGH” TTL level.
3.8 AT+BTRSSI?
FEATURE The receiving sensitivity of communication with bluetooth which is currently
connected is transmitted to the host.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155
RESPONSE ∠-255 ~ 255∠
DESCRIPTION
The receiving sensitivity of communication with bluetooth which is currently
connected is transmitted to the host.
The RSSI value closer to 0 is a good condition of receiving sensitivity.
The current receiving sensitivity with master (N) can be checked by using the
“AT+BTRSSI? n” commands (n is the order of connection to the master) at Slave (1) in
case of 1:N communication.

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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3.9 AT+BTLQ?
FEATURE The link quality with the currently connected bluetooth is transmitted to host.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155
RESPONSE ∠-255 ~ 255∠
DESCRIPTION
The link quality between the currently connected bluetooth and BT is transmitted to
host.
The link quality closer to 255 is a good condition of link quality.
The current link quality with master (N) can be checked by using the “AT+BTLQ?n”
commands (n is the order of connection to the master) at Slave (1) in case of 1:N
communication.
3.10 +++
FEATURE To change the operation status from “BYPASS” to standby mode for command
language.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155
RESPONSE ∠OK∠
DESCRIPTION
After BT is connected to other Bluetooth, all the data sent to BT shall be transmitted
to the other party’s device of Bluetooth.
This status is called BYPASS status, where “+++” text row shall be switched into the
standby mode for command which will interpret and process the AT command
language.
The command language shall be supported by Master.
3.11 ATO
FEATURE To switch from standby mode for command language to BYPASS mode where data
can be transmitted/received.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
DESCRIPTION With the Bluetooth is connected, switch to standby mode for command language
with “+++” text row, then switch to BYPASS mode to transmit/receive data.
3.12 ATOn
FEATURE At 1:N communication, to switch BYPASS mode It is used for the Master to which the
Slave will send the data, and to switch to the BYPASS condition.
APPLY PRODUCTS FB100AS, FB200AS, FB755
RESPONSE RS232 level STREAM STATUS signal is “HIGH”.(when command language is

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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properly performed.)
TTL level STREAM STATUS signal is “LOW”.(when command language is
properly performed.)
DESCRIPTION
With 1:N communication, it is used to form area between Master and Stream
(BYPASS) where the data will be transmitted.
This command language is Slave regardless of CONNECTION MODE, and usable
when the OPERATION MODE is MODE1 or MODE2.
If the command language properly operates, the signal of STREAM STATUS(DTS) shall
be “HIGH” at RS-232 level, and “LOW” at TTL level. If the command language does
not properly operate, the signal of stream status will keep “LOW” at RS-232 level, and
“HIGH” at TTL level.
The command language will be recognized properly when “LOW signal is pressed at
STREAM CONTROL(DSR) RS-232 level and “HIGH” TTL level.
3.13 AT+BTCANCEL
FEATURE BT will have the jobs stopped in progress.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
DESCRIPTION
Used to stop the jobs being undertaken by BT coercively currently.
The kinds of works could be stopped coercively will including inquiry/page scan
(AT+BTSCAN), connection trial (ATD), and Bluetooth device inquiry (AT+BTINQ?).
BT will be switched to standby mode for command if the works properly completed.
3.14 AT+BTSCAN
FEATURE To have BT inquiry scan and page scan.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
∠OK∠
∠CONNECT 123456789012∠ (response if other device is connected.)
DESCRIPTION
Bluetooth device allows inquiry only for Bluetooth devices which were on inquiry
scan, and allows connection only to the devices on page scan.
This command allows other Bluetooth devices to search BT and can be connected
any time.
If connection is made to Bluetooth devices, message of “CONNECT 123456789012”
showed up, and resume inquiry scan and page scan upon disconnection. Therefore,
command of AT+BTCANCEL shall be used to switch to standby mode for command
language.

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3.15 AT+BTSCAN,n,t0
FEATURE Make BT in inquiry scan and page scan selectively.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
∠OK∠
∠CONNECT 123456789012∠
DESCRIPTION
Allow the inquiry and connection depending on the value of N.
n = 1
Make the BT process the inquiry scan only. (Inquiry Scan)
It is available for the other bluetooth device to search BT in bluetooth
device search, but the connection is not available.
n = 2
Make the BT process the page scan only. (Page Scan)
It is available for the other bluetooth device to search BT in bluetooth
device search, but the connection is not available.
n = 3
Make the BT process the inquiry scan only and page scan. (Inquiry
and Page Scan)
It is available for the other bluetooth device to search BT in bluetooth
device search, the connection is available also.
The BT process the inquiry scan or page scan from the other bluetooth device during
given t0 time. You have to wait indefinitely if the t0 is 0.
3.16 AT+BTSCAN,123456789012,t0
FEATURE The connection from the bluetooth device with bluetooth address of 123456789012
is waited only.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155
RESPONSE
∠OK∠
∠CONNECT 123456789012∠
DESCRIPTION
It is used in case for accepting the connection from a specific bluetooth
device. It does not perform the inquiry scan but page scan only. The
connection working process is performed in t0 (second). It is converted to
the original state of waiting for commands if the connection with bluetooth
is not available during t0 (second) or the connection is released after the
connection with bluetooth. However, it performs the waiting for connection
until success of connection from the corresponding bluetooth device
especially the value of t0 is 0. It performs the waiting for connection again
with converting to the original stand by state of command after the
disconnection with bluetooth.
3.17 AT+BTINQ?
FEATURE To inquiry for Bluetooth devices exists around.

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
∠OK∠
∠<BLUETOOTH Address>,<DEVICE NAME>,<CoD>∠
∠OK∠
DESCRIPTION
It searches for Bluetooth devices on inquiry scan to transmit the devices’ information
including address, name of devices, and class of device to the Host. Can search for
up to 9 Bluetooth devices in about 20 seconds, and “OK” message will be
transmitted upon completion of Bluetooth searching.
3.18 ATD
FEATURE To attempt again to connect with the latest recently connected Bluetooth device.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
∠OK∠
∠CONNECT 123456789012∠ (response when reconnection is made)
∠ERROR∠ (response in case of connection failure)
DESCRIPTION
BT remembers the address of Bluetooth device most recently connected. (can be
certified with AT+BTINFO?2.)
In this case, you can try to connect the Bluetooth device again by using this
command simply without specifying the address of the appropriate Bluetooth device.
It will generate “ERROR” message in case the address of the Bluetooth device has
not been connected at all. “0000000000000”
3.19 ATD123456789012
FEATURE Try to Connect to Bluetooth with the Bluetooth address of 123456789012
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE
∠OK∠
∠CONNECT 123456789012∠ (response when reconnection is made)
∠ERROR∠ (response in case of connection failure)
DESCRIPTION
Try to connect by specifying the address of target Bluetooth device.
For successful connection, the target Bluetooth device should be on page scan.
The connection attempt will last for 30 seconds, BT will take procedures of
authentication automatically, if required.
3.20 ATH
FEATURE To release the current connection.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570

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RESPONSE
∠OK∠
∠DISCONNECT∠
DESCRIPTION
It shall be used to release the connection of Bluetooth.
This command shall be operable by Master only when the OPERATION MODE is in
MODE0
3.21 AT+BTLPM,n
FEATURE To select if low power management feature of BT will be used or not.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
PARAMETERS
n = 0 the power save mode is not used.
n = 1 the power save mode is used.
DESCRIPTION
In general, the Bluetooth device connected to other Bluetooth device can save power
consumption of the device while there is no data transmission/receipt, by using low
power management feature.
This command is to select if low power management feature will be used or not.
With BT, it is set such that it shall not use as initial value.
If the value of n is 1, it will use low power management feature and n is 0, it shall
not use low power management feature.
In case the low power management feature will be utilized, there might be some
delay in data transmit/receipt.
EX HOST Æ BT : AT+BTLPM,1↵
BT Æ HOST : ∠OK∠
3.22 AT+BTUART,b(baud rate),p(parity bit),s(stop bit)
FEATURE To Change the set value of serial communication of BT.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
PARAMETERS
b(baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400
p(parity bit) N(NONE) / E(EVEN) / O(ODD)
s(stop bit) 1 / 2
DESCRIPTION The elements required for serial communication including number of bit per second
(baud rate), parity, and stop bit may be changeable.
EX HOST Æ BT : AT+BTUART,57600,N,1↵
BT Æ HOST : ∠OK∠

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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3.23 AT+BTSEC,n(Authentication),n(Encryption)
FEATURE To select the features of Authentication, and Encryption of Bluetooth.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
PARAMETERS
AUTHENTICATION n = 0 Not used
n = 1 Used
ENCRYPTION n = 0 Not used
n = 1 Used
DESCRIPTION To select if the authentication process and encryption feature of Bluetooth will be
used or not.
EX HOST Æ BT : AT+BTSEC,1,1↵
BT Æ HOST : ∠OK∠
3.24 AT+BTMODE,n
FEATURE To set CONNECTION MODE of BT.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155
RESPONSE ∠OK∠
PARAMETERS
n = 1
(MODE1)
MASTER
If there is information on the Slave most recently
connected, it shall try to connect with the Slave only
unless factory set value (AT&F) is requested.
If there is no information on the most recently connected
Slave, it will search for the Bluetooth around among
which it will request to connect to the first Slave has sent
the response.
SLAVE
If there is information of Master most recently connected,
it will allow only the Master to be connected.
If there is no information of Master most recently
connected, it will allow the first Master requesting
connection only for inquiry scan and page scan.
n = 2
(MODE2)
MASTER To provide connection with the Slave found out first
around the Bluetooth devices.
SLAVE
To allow the first Master requesting to be connected
among the around Bluetooth devices for on page scan,
and inquiry scan.
n = 3
(MODE3)
MASTER To perform the same functions as with MODE1.
SLAVE If there is the latest connected information of Master, it
will allow only page scan, which prevent other Masters to

AT Command Language with Detailed Description and Usage 3 Features of AT Commands
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find Slaves.
If there is no information of Masters connected, it shall
operate as with MODE2.
n = 4
(MODE4) AT command is in standby mode.
DESCRIPTION
BT supports four kinds of CONNECTION MODE.
The CONNECTION MODE is used to allow or limit the connection of other Bluetooth
devices, based on the GAP.
If the power is authorized the same operation will be executed as explained.
EX HOST Æ BT : AT+BTMODE,1↵
BT Æ HOST : ∠OK∠
3.25 AT+BTOPMODE,n
FEATURE To set 1:N communication use or not
APPLY PRODUCTS FB100AS, FB200AS, FB755
RESPONSE ∠OK∠
PARAMETERS
n = 0 MODE0
n = 1 MODE1
n = 2 MODE2
DESCRIPTION
As for the 1:N communication set up, MODE0 is based on 1:1 communication,
MODE1 is based on monitoring, and MODE2 is for selective large volume
transmit/receive.
Please refer to the User Manual 1:N data transmission/receipt for detailed
information. (Appendix C)
EX HOST Æ BT : AT+BTOPMODE,1↵
BT Æ HOST : ∠OK∠
3.26 AT+BTMSG,n
FEATURE To select status message output or not.
APPLY PRODUCTS FB100AS, FB200AS, FB755, FB155, FB570
RESPONSE ∠OK∠
PARAMETERS n = 0 Status message not used.
n = 1 Status message used.
DESCRIPTION
If power is authorized, with current status is connected as “BTWIN Master mode
start”, “BTWIN Slave mode start”, you may select output of status message such as
“CONNECT 123456789012” or not. If you don’t need message, you may disable it by
set to N=0.
EX HOST Æ BT : AT+BTMSG,1↵