LM Technologies LM78X BLUETOOTH MODULE User Manual VVXLM78X FCCID UsersManual

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LM Technologies Ltd.
AT Command Manual
Applicable for Firmware version 4.5X, 4.6X, 6.5X, 6.1X
Revision
v1.0
v1.1
v1.2
v1.3
Date
21-07-2009
24-09-2009
15-06-2010
22-03-2011
Name
Kanwal
Kanwal
Kanwal
Sumeet
Description
Initial Draft version
New AT command added
Applicable to firmware v4.53, v4.61
Updates for firmware v6.51
This device complies with the following radio frequency and safety standards.
Important to OEM Manufacturer:
This following FCC Warning must be included in the HOST User Manual.
FCC Warning
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
NOTE 1: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-Consult the dealer or an experienced radio/TV technician for help.
NOTE 2: Any changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. End users must follow the specific operating instructions for satisfying RF exposure
compliance.
Note 1: This module certified that complies with RF exposure requirment under portable or
mobile or fixed condition, this module is to be installed only in portable or mobile or fixed
applications.
A portable device is defined as a transmitting device designed to be used so that the radiating
structure(s) of the device is/are within 20 centimeters of the body of the user
A mobile device is defined as a transmitting device designed to be used in other than fixed
locations and to generally be used in such a way that a separation distance of at least 20
centimeters is normally maintained between the transmitter's radiating structure(s) and the body of
the user or nearby persons. Transmitting devices designed to be used by consumers or workers
that can be easily re-located, such as wireless devices associated with a personal computer, are
considered to be mobile devices if they meet the 20 centimeter separation requirement.
A fixed device is defined as a device is physically secured at one location and is not able to be
easily moved to another location.
Note 2: Any modifications made to the module will void the Grant of Certification, this module is
limited to OEM installation only and must not be sold to end-users, end-user has no manual
instructions to remove or install the device, only software or operating procedure shall be placed
in the end-user operating manual of final products.
Note 3: The device must not transmit simultaneously with any other antenna or transmitter.
Note 4: To ensure compliance with all non-transmitter functions the host manufacturer is
responsible for ensuring compliance with the module(s) installed and fully operational. For
example, if a host was previously authorized as an unintentional radiator under the Declaration of
Conformity procedure without a transmitter certified module and a module is added, the host
manufacturer is responsible for ensuring that the after the module is installed and operational the
host continues to be compliant with the Part 15B unintentional radiator requirements. Since this
may depend on the details of how the module is integrated with the host, LM Technologies Ltd
shall provide guidance to the host manufacturer for compliance with the Part 15B requirements.
Note 5: FCC ID label on the final system must be labeled with “Contains FCC ID: VVXLM78X”
or “Contains transmitter module FCC ID: VVXLM78X”.
The transmitter module must be installed and used in strict accordance with the manufacturer's
instructions as described in the user documentation that comes with the host product. LM
Technologies Ltd is responsible for the compliance of the module in all final hosts.
AT Command Manual
v1.3
Contents
Introduction..................................................................................................................................... 4
AT command Set ............................................................................................................................. 4
2.1
History ..................................................................................................................................... 4
2.2
Terminology............................................................................................................................. 4
2.3
Command format .................................................................................................................... 4
2.4
Command Response................................................................................................................ 5
2.5
Host Events.............................................................................................................................. 5
2.6
Operation Mode...................................................................................................................... 5
2.7
Command Types...................................................................................................................... 6
2.8
Command Description............................................................................................................. 6
2.8.1
AT..................................................................................................................................... 6
2.8.2
AT+VER ............................................................................................................................ 7
2.8.3
AT+ENQ ........................................................................................................................... 7
2.8.4
AT+RESET......................................................................................................................... 7
2.8.5
AT+BAUD ......................................................................................................................... 7
2.8.6
AT+STOP .......................................................................................................................... 8
2.8.7
AT+PAR ............................................................................................................................ 8
2.8.8
AT+FLOW ......................................................................................................................... 9
2.8.9
AT+ECHO ......................................................................................................................... 9
2.8.10
AT+RESP.........................................................................................................................10
2.8.11
AT+MODEM...................................................................................................................10
2.8.12
AT+ROLE ........................................................................................................................12
2.8.13
AT+ADDR .......................................................................................................................12
2.8.14
AT+FIND.........................................................................................................................12
2.8.15
AT+RSSI..........................................................................................................................13
@2010 LM- Technologies Ltd
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AT Command Manual
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2.8.16
AT+NAME ......................................................................................................................13
2.8.17
AT+PIN ...........................................................................................................................13
2.8.18
AT+DCOV .......................................................................................................................14
2.8.19
AT+CONN.......................................................................................................................14
2.8.20
AT+DROP .......................................................................................................................15
2.8.21
AT+BOND.......................................................................................................................15
2.8.22
AT+ACON .......................................................................................................................15
2.8.23
AT+ESC...........................................................................................................................16
2.8.24
AT+AUTO .......................................................................................................................16
2.8.25
AT+RCFG ........................................................................................................................17
2.8.26
AT+SLEEP .......................................................................................................................17
2.9
Default Factory Settings ........................................................................................................18
@2010 LM- Technologies Ltd
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Page 3 of 18
AT Command Manual
v1.3
1 Introduction
This document describes the configuration commands to control the operation of following LM
Bluetooth devices:
1)
2)
3)
4)
5)
6)
7)
8)
9)
LM048 adapter
LM058 adapter
LM048 SPA adapter
LM400 module
LM780 module
LM071 module
LM072 module
LM048v2 adapter
LM058v2 adapter
2 AT command Set
2.1 History
The AT command set was developed by Hayes to control the operation of telephony modems. The
command set has been extended to control bluetooth device primary operation such as inquiry,
connection setup/ disconnection etc. Other AT commands are also available to control the serial port
setup and other user friendly features.
The Bluetooth device powers up in unconnected state and can be configured using UART interface
similar to telephony modems. The device will act as Bluetooth slave by default and can be
inquired/connect from other Bluetooth master device in neighborhood. The AT commands can be
used to change the default behavior and settings for the current as well as future power up cycles.
2.2 Terminology
Symbol
Description
ASCII value (Hex)



XXXXXXXXXXXX
Carriage Return
Line Feed
Carriage return and line feed
12 hexadecimal BD address
sequence
0x0D
0x0A
0x0D, 0x0A
2.3 Command format
All the AT commands except the “AT” test command use the below command structure:
< parameters> 
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AT Command Manual
v1.3
 - Each command will start with “AT+” character sequence except “AT” test command.
 - Command name as shown in below table listing all the available commands.
 - The parameters are required for most of the commands. The parameter may be
character, integer and character sequence (BD address, Pin code, Name etc) depending on the
command operation.
 - This character terminates the command packet and signals the device to proceed with
command execution.
2.4 Command Response
The AT commands will have the response in the below format:

 - This sequence will be part of response to the commands sent in query format.
e.g. STOP1 where STOP is the parameter related to serial port stop bits and 1 is the parameter value.
 - The command response can be any one of following types:
¾ OK - If the command has been sent to Bluetooth device in correct format and is
applicable in current device operating mode.
¾ ERROR - If the command has been sent in wrong format/command is invalid/
command is not applicable in current device operating mode.
¾  - If the command response has been disabled.
2.5 Host Events
Host device connected to Bluetooth device will receive an event sequence on occurrence of
Bluetooth related events.
Different  are:
¾ CONNECT “XXXXXXXXXXXX” - The event sequence will be received on a
successful connection attempt either by local device or from a remote bluetooth device.
¾ CONNECT Attempt Fail - When the attempted connection attempt from the
local Bluetooth device fails for some reason. The reason for connection failure will not be
listed.
¾ DISCONNECT “XXXXXXXXXXXX” - On the disconnection of the current active
connection, the sequence will be received.
¾ Inquiry Cancelled - When the inquiry operation from the local Bluetooth device
is pre terminated using the AT command, the event will be sent to host device.
2.6 Operation Mode
The device will always be in one of the below operating modes:
Online Data Mode
Command Mode
Online Command Mode
Data transfer mode when device is in connected state.
Accepts AT command for device configuration.
Accepts almost all AT commands for device configuration in connected
state.
@2010 LM- Technologies Ltd
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AT Command Manual
v1.3
2.7 Command Types
Command Type
Parameter
Device Information
Reset
Serial Port
Bluetooth
Type
Information
Settings
Connection
Misc
Test
Firmware Version
Settings
Restore Factory
Settings
Baud Rate
Stop Bits
Parity bits
Flow Control
Character Echo
Command Response
Modem Signal
Device Role
BD Address
Inquire devices
RSSI
Device Name
Security
Discoverability
Connect inquired
device
Drop connection
Bonding
Auto Connect
Escape Sequence
Escape Sequence
handling
Mode switch
Remote Configuration
Low power Mode
Command
AT
AT+VER
AT+ENQ
AT+RESET
AT+BAUD
AT+STOP
AT+PAR
AT+FLOW
AT+ECHO
AT+RESP
AT+MODEM
AT+ROLE
AT+ADDR
AT+FIND
AT+RSSI
AT+NAME
AT+PIN
AT+DCOV
AT+CONN
AT+DROP
AT+BOND
AT+ACON
+++
AT+ESC
AT+AUTO
AT+RCFG
AT+SLEEP
2.8 Command Description
2.8.1 AT
This command allows the connected host device to check the availability of the Bluetooth device.
The connected host device must have same serial port settings as configured for the Bluetooth
device.
2.8.1.1 Syntax
AT
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AT Command Manual
v1.3
2.8.1.2 Response

2.8.2 AT+VER
Returns the device firmware version
2.8.2.1 Syntax
AT+VER
2.8.2.2 Response
FW VERSION: vX.YZ
Where X: Major release of device firmware
YZ: Minor release/updates of device firmware
e.g. FW VERSION: v4.50
2.8.3 AT+ENQ
List all the device information and all the settings along with their brief description. The settings
include serial port, Bluetooth related and other misc settings.
2.8.3.1 Syntax
AT+ENQ
2.8.3.2 Response

 for each parameter.
e.g. device role setting will be listed as “ROLEM, MASTER ROLE ”. All other
settings and other device information is listed in similar manner.
2.8.4 AT+RESET
This command is used to restore the default factory settings and perform device reboot. The default
factory settings are listed in table [reference]
2.8.4.1 Syntax
AT+RESET
2.8.4.2 Response

2.8.5 AT+BAUD
The command allows setting the baud rate for the serial UART port. The current baud rate setting
can also be retrieved by sending this command in query format.
2.8.5.1 AT+BAUDb
where b – varies from 10 to 20 for different baud rates. The baud rate varies from 1200bps
to 921 Kbps. e.g. To set 19200 as UART baud rate, the command is AT+BAUD14
10
Baud rate (bps)
1200
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AT Command Manual
11
12
13
14
15
16
17
18
19
20
v1.3
2400
4800
9600
19200
38400
57600
115200
230400
460800
921600
2.8.5.1.1 Response

2.8.5.2 AT+BAUD?
2.8.5.2.1 Response
BAUDb if the command is successful. Here, b- current
baud rate setting. E.g on default setup, the response will be
BAUD14
2.8.6 AT+STOP
The command is used to specify one or two stop bits for serial port communication. The current
setting can also be retrieved sending this command in query format.
2.8.6.1 AT+STOPn
where n – can be 1 or 2 depending on no of stop bits used.
Stop bits (no)
2.8.6.2 Response

2.8.6.3 AT+STOP?
2.8.6.3.1 Response
STOPn if the command is successful. Here, n- no of
stop bits. E.g on default setup, the response will be
STOP1
2.8.7 AT+PAR
The command is used to specify the parity type of serial port. The current setting can also be
retrieved sending this command in query format.
2.8.7.1 AT+PARn
where n – varies from 0 to 2 depending on the type of parity used.
@2010 LM- Technologies Ltd
Parity Type
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AT Command Manual
v1.3
None
Odd
Even
2.8.7.1.1 Response

2.8.7.2 AT+PAR?
2.8.7.2.1 Response
PARn if the command is successful. Here, n- parity type.
E.g on default setup, the response will be PAR0
2.8.8 AT+FLOW
The command is used to enable/disable the RTS/CTS flow control for the serial port. The current
setting can also be retrieved by sending this command in query format.
2.8.8.1 AT+FLOWc
Where parameter c is a character used to enable/disable the flow control.
Flow Control
‘+’
Enable
‘-‘
Disable
Note, this command will cause the device to reboot.
2.8.8.1.1 Response

2.8.8.2 AT+FLOW?
2.8.8.2.1 Response
FLOWc if the command is successful. Here, c- current
flow control setting. E.g on default setup, the response will be
FLOW+
Note:
1. In LM048 SPA adapter with firmware series 4.6x, AT+FLOW refers to DTR/DSR flow control
and no RTS/CTS handling is supported. For all other products, AT+FLOW refers to RTS/CTS
flow control.
2. In LM048v2 and LM058v2 adapters running v6.5x firmware, this setting can be used in
conjunction with AT+MODEM command to choose different configurations of RS232 lines.
See Section 2.8.11
2.8.9 AT+ECHO
The command is used to enable/disable the echo back of command characters from the Bluetooth
device. The current setting can also be retrieved by sending this command in query format.
2.8.9.1 AT+ECHOc
Where parameter c is a character used to enable/disable the echo back feature.
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AT Command Manual
‘+’
‘-‘
v1.3
Echo back
Enable
Disable
2.8.9.1.1 Response

2.8.9.2 AT+ECHO?
2.8.9.2.1 Response
ECHOc if the command is successful. Here, c- current
echo back setting. E.g on default setup, the response will be
ECHO+
2.8.10 AT+RESP
The command is used to enable/disable the command response from the Bluetooth device. Different
types of command response may be received by Host device and are listed in Command Response.
The current setting can also be retrieved by sending this command in query format.
2.8.10.1 AT+RESPc
Where parameter c is a character used to enable/disable the command response.
‘+’
‘-‘
Command Response
Enable
Disable
2.8.10.1.1 Response

2.8.10.2 AT+RESP?
2.8.10.2.1 Response
RESPc if the command is successful. Here, c- current
command response setting. E.g on default setup, the response will be
RESP+
2.8.11 AT+MODEM
This command is available only for v6.5x firmware. This is the default firmware in LM048v2 and
LM058v2 adapters. This command is used in conjunction with AT+FLOW command to enable/disable
various RS232/Modem Signals. The current setting can also be retrieved by sending this command in
query format.
2.8.11.1 AT+MODEMc
Where parameter c is used to disable or configure Local Loopback or Remote Transfer
settings on the adapter
‘-’
‘L‘
‘R’
Modem Signals
Disable
Local Loopback
Remote Transfer
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AT Command Manual
v1.3
2.8.11.1.1 Response

The meaning of the modems signals is described in section 2.8.11.3
2.8.11.2 AT+MODEM?
2.8.11.2.1 Response
MODEMc if the command is successful. Here, c- current
modem signal setting. E.g on default setup, the response will be MODEM
2.8.11.3 Modem Signal Meaning
The modem signal setting is used in conjunction with AT+FLOW Settings to enable/disable
RS232 modem control signals as per the table below.
FLOW CONTROL
(AT+FLOW)
MODEM SIGNAL
(AT+MODEM)
RS232 SIGNALS
Description
FLOW-
MODEM-
Tx, Rx, GND
3 wire configuration
FLOW+
MODEM-
Tx, Rx, GND, RTS, CTS
RTS CTS signals are used for data
flow control between host and
adapter, and NOT transferred to
remote side wirelessly.
FLOW-
MODEML
Tx, Rx, GND, RTS<->CTS,
DTR<->DSR
RTS looped back to CTS, DTR looped
back to DSR
FLOW+
MODEML
Tx, Rx, GND, RTS, CTS,
DTR<->DSR
RTS CTS signals used for data flow
control between host and adapter,
and NOT transferred to remote side
wirelessly. DTR looped back to DSR.
This configuration is equivalent to
LM048 adapter running v4.5x
firmware
FLOW-
MODEMR
Tx, Rx, GND, RTS(R),
CTS(R), DTR(R), DSR(R)
All 7 signals used. All RS232 control
signals (DTR, DSR, RTS and CTS)
transferred wirelessly to remote
side.
FLOW+
MODEMR
Tx, Rx, GND, RTS, CTS,
DTR(R), DSR(R)
All 7 lines used. Only DTR, DSR
signals transferred wirelessly to
remote side. If RTS, CTS signals are
not used, then this configuration is
equivalent to LM048 SPA Adapter
running v4.6X firmware.
@2010 LM- Technologies Ltd
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AT Command Manual
v1.3
2.8.15 AT+RSSI
Inquire RSSI value for current bluetooth connection. This command is available in online command
mode when the device is in connected state.
2.8.15.1 AT+RSSI
2.8.15.1.1 Response

 - can be STRONG/AVERAGE/WEAK depending on the received radio signal
strength.
2.8.16 AT+NAME
This command is used to specify a name for the adaptor. You can specify a friendly name using 0 to
9, A to Z, a to z, space and –, which are all valid characters. Note that “first space or -, last space or –
isn’t permitted”. The default name is “Serial Adapter”. The current device name can be retrieved by
sending this command in query format.
2.8.16.1 AT+NAME=XXXX
Where the parameter ”XXXX” is a character string with a maximal length of 16.
2.8.16.1.1 Response

2.8.16.2 AT+NAME?
2.8.16.2.1 Response
 if the command is successful. Here,  is
the device name . E.g on default setup, the response will be Serial
Adapter
2.8.17 AT+PIN
This command is used to specify a PIN code for a secured bluetooth connection. The default PIN is
"1234". Paired Bluetooth devices should have a same PIN code. The current pin code setting can be
retrieved by sending this command in query format.
2.8.17.1 AT+PIN=XXXX
Where the parameter ”XXXX” is a 4-8 digit string.
2.8.17.1.1 Response

2.8.17.2 AT+PIN-
This command will cancel the pin code security for Bluetooth connections. The remote
Bluetooth device must also cancel pin code security in order to connect successfully with
local Bluetooth device. Some devices e.g. Mobile phone do not allow connection without pin
code security so disabling pin code security will prohibit successful connection with these
devices.
2.8.17.2.1 Response

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AT Command Manual
v1.3
2.8.17.3 AT+PIN?
2.8.17.3.1 Response
 if the command is successful. Here,  is the
pin code in use . E.g on default setup, the response will be
1234 .Incase, the pin code security is disabled the
response will be NULL
2.8.18 AT+DCOV
It is used to specify whether the adaptor can be discovered or connected by remote devices. The
current setting can also be retrieved by sending this command in query format.
2.8.18.1 AT+DCOVc
Where parameter c is a character used to enable/disable the discoverability status.
Status
‘+’
Discoverable
‘-‘
Non-discoverable
Note, this command will cause the device to reboot.
2.8.18.1.1 Response

2.8.18.2 AT+DCOV?
2.8.18.2.1 Response
DCOVc if the command is successful. Here, c- current
discoverability status setting. E.g on default setup, the response will be
DCOV+
2.8.19 AT+CONN
This command is used to establish a connection. It is available only when the local Bluetooth device
is in the manual master role.
2.8.19.1 AT+CONN
Connect the local bluetooth device to specified bonded bluetooth device. It is available only
when "AT+BOND=xxxxxxxxxxxx" is executed..
2.8.19.1.1 Response
 where  will be connection related
event and depends on the connection attempt result.
2.8.19.2 AT+CONN= XXXXXXXXXXXX
Connect the local bluetooth device to the bluetooth device address specified by
XXXXXXXXXXXX.
2.8.19.2.1 Response
 where  will be connection related
event and depends on the connection attempt result.
2.8.19.3 AT+CONNn
Where parameter n is list index of the remote device found through AT+FIND? command.
n- varies from 1 to 8.
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AT Command Manual
v1.3
2.8.19.3.1 Response
 where  will be connection related
event depending on the connection attempt result.
2.8.20 AT+DROP
This command is used to drop connection from master or slave device. It is only allowed in online
command mode when the device is in connected state.
2.8.20.1 AT+DROP
Drop current connection when the device in online command mode.
2.8.20.1.1 Response
 where  will be dis-connection
event.
2.8.21 AT+BOND
For security purpose, this command is used to specify a unique remote Bluetooth device to be
connected. In the master role, the local device pairs and connects with the designated remote slave
address. In the slave mode, this command is a filter condition to accept the connection request from
the master device. The current bonded device address can be retrieved by sending this command in
query format.
2.8.21.1 AT+BOND=XXXXXXXXXXXX
2.8.21.1.1 Response

2.8.21.2 AT+BOND-
Restore the status in which the local Bluetooth device can connect with any remote device.
There is no device bonded with local device.
2.8.21.2.1 Response

2.8.21.3 AT+BOND?
2.8.21.3.1 Response
 if the command is successful. Here,
XXXX-XX-XXXX is the Bluetooth address of bonded device. . E.g on default setup,
there will be no bonded device, hence the response will be 0000-000000
2.8.22 AT+ACON
This command is used to enable/disable auto-connection feature in the master role. The current
setting can also be retrieved by sending this command in query format.
2.8.22.1 AT+ACONc
Where parameter c is a character used to enable/disable the auto connection feature.
‘+’
‘-‘
Connect Type
Auto Connect
Manual
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AT Command Manual
v1.3
2.8.25 AT+RCFG
This command enables or disables configuration from the remote device by executing the remote
access hand shaking protocol. Please ask for separate document for remote configuration details.
The current setting can also be retrieved by sending this command in query format.
2.8.25.1 AT+RCFGc
Where parameter c is a character used to enable/disable the remote configuration.
‘+’
‘-‘
Status
Enable
Disable
2.8.25.1.1 Response

2.8.25.2 AT+RCFG?
2.8.25.2.1 Response
RCFGc if the command is successful. Here, c- current
setting. E.g on default setup, the response will be
RCFG+
2.8.26 AT+SLEEP
This command is used to enable/disable auto-power saving feature of RS232 driver as well as low
power modes of Bluetooth device. The current setting can also be retrieved by sending this
command in query format.
2.8.26.1 AT+SLEEPc
Where parameter c is a character used to enable/disable the auto power saving feature.
‘+’
‘-‘
Status
Enable
Disable
2.8.26.1.1 Response

2.8.26.2 AT+SLEEP?
2.8.26.2.1 Response
SLEEPc if the command is successful. Here, c- current
setting. E.g on default setup, the response will be SLEEP
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AT Command Manual
v1.3
2.9 Default Factory Settings
Parameter
Default Value
(v4.xx firmware)
Default Value
(v6.5x firmware)
Description
BAUD
STOP
PAR
FLOW
14
14
ECHO
RESP
MODEM
ROLE
NAME
Not supported
Serial Adapter
SerialAdapterXX
PIN
DCOV
BOND
ACON
ESC
RCFG
SLEEP
1234
0000-00-000000
1234
0000-00-000000
19200 bps
1 stop bit
None
+: Hardware,
- : Disabled
Enabled
Enabled
Disabled
Slave device
Device name. XX is last 2
digits of Bluetooth Address
Enabled
Discoverable
No Bonding
Auto-Connect
Enabled
Enabled
Disabled
@2010 LM- Technologies Ltd
www.lm-technologies.com
Page 18 of 18

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Company                         : LM Technologies Ltd
Create Date                     : 2012:02:07 14:45:38+08:00
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Title                           : VVXLM78X_FCCID_UsersManual.pdf
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