AT Command Manual
v1.5
©2013 LM Technologies Ltd
www.lm-technologies.com
Page 20 of 26
0
Display Only
1
Display with Yes or No
2
Keyboard Only
3
No Display No Keyboard
4
Reject connection with remote
Bluetooth 2.1 devices
2.8.29.1.1
Response
<command_response>
2.8.29.2
AT+IOTYPE?<cr>
2.8.29.2.1
Response
<cr,lf>IOTYPEn<command_response> if the command is successful. Here, n- device
type. E.g. on default setup, the response will be
<cr,lf>IOTYPE3<command_response>
2.8.30
AT+MITM
This command is only available in v6.17 firmware running on LM780/LM400/LM072 modules. This
command enables/disables the MITM (man in the middle) protection used for connection security
with remote Bluetooth 2.1 device. By default, MITM is disabled which results in Automatic pairing
(also known as Just Works) on connection with remote Bluetooth 2.1 complaint device if remote
devices allows connection with no MITM protection. The current setting can be retrieved by sending
this command in query format.
2.8.30.1
AT+MITMc<cr>
Where parameter c is a character used to enable/disable the MITM security feature.
c
MITM security
‘+’
Enabled
‘-‘
Disabled
2.8.30.1.1
Response
<command_response>
2.8.30.2
AT+MITM?<cr>
2.8.30.2.1
Response
<cr,lf>MITMc<command_response> if the command is successful. Here, c- MITM
security setting. E.g. on default setup, the response will be <cr,lf>MITM-
<command_response>
2.8.31
AT+PASSCFM
This command is only available in v6.17 firmware running on LM780/LM400/LM072 modules. It must
be used during passkey security exchange before connection with remote Bluetooth 2.1 devices if
local device “IOTYPE” has been configured as “
Display with Yes or No
” and MITM protection has
been enabled.
2.8.31.1
AT+PASSCFM= XXXXXXXXXXXX,c<cr>
This command is used to send passkey confirmation during passkey security exchange before
connection with remote Bluetooth 2.1 devices. Here, the parameter c” is a either ‘Y’ or ‘N’
and “XXXXXXXXXXXX” is address of remote Bluetooth 2.1 device. This command must be
