LM Technologies RS232 User manual

Bluetooth RS232 Serial A dapt er
Document Version: 1.2
Firmware Version: 4.52
LM058

Document History
Revision Date Name Description
1.0 13-03-
2008
MS Initial version
1.1 25-03-
2010
SV, KS 1.
Update the AT
Command Set
2. Update snapshot of
configuration software
1.2 05-05-
2010
SV Updated AT+BAUD
Command. Deleted
460.8 kbps and 921.6
kbps support

Table of contents
1. Intr
oduction Page 1
2. Features Page 1
3. Package Page 2
4. General Specific a tion Page 2
5. RS 232 Interface Page 3
5.1 Pin Out
Page 3
5.2
Signals
Page 3
5.3
Factory Se ttings
Page 3
6.
Installa tion
Page 4
6.1 Hardware Structure Page 4
6.2
Reset Butt on
Page 4
6.3
Slide Switch
Page 4
6.4
Power Supply
Page 5
6.5
LED Status
Page 5
6.6 Installation procedure Page 5
7. Usage
Page 5
7.1
Hyperterminal
Page 5
7.2 Configuration Start up Page 6
7.3 Master Role Configuration Page 6
7.4 Configure Master-Slave Adaptor pair Page 6
7.5 AT Command set Page 7-10
8. Windows configuration software Page 11
9. Warranty and disposal notice Page 12

1. Introducon
Welcome to the LM Technologies Bluetooth RS232 Serial adapter.
The LM058 adapter eliminates your convenonal RS232 serial
cables, providing an easy-to-use, invisible connecon with
superior freedom of movement. This adaptor allows any device
with a standard 9-pin serial port to communicate wirelessly.
You can communicate with another Bluetooth serial adaptor or
other Bluetooth enabled devices such as a laptop computer, PDA or
mobile phone.
2 Features
Supports Bluetooth Serial port profile and Generic Access profile
No need of external host and soware
Ease of installaon and use
Supports configuraon of the local device
Ease of maintenance
Supports External SMA Antenna
Supports up to 100 meters (open space)
Page 1

3. Package
Bluetooth serial adaptor
DB9 male to female converter
USB cable for power supply
DC adaptor
User manual
4. General Specific a tion
Specification
Description
Baud Rate
1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2/230.4 Kbps
Coverage
Up to 100 Meters
Connection
Point-to-Point (piconet)
Signal
TxD, RxD, GND, CTS, and RTS
RS-232 Interface D_SUB 9-pin female
Standard Bluetooth
Specification v2.0+EDR
Frequency 2.400 to 2.4835 GHz
Hopping
1,600/sec, 1MHz channel space
Modulation
GFSK-1 Mbps, DQPSK-2 Mbps, and 8-DPSK-3 Mbps
Tx. power
Max. 18 dBm (Class 1)
Rx. Sensitivity
-86 dBm typical
Antenna
External antenna
Antenna Gain Max. 1 to 2 dBi
Power Supply
+5 to +6 V DC
Current Consumption
Max. 90 mA
Operation Temperature
-20°C to +75°C
Dimensions
35 mm (W) x 65 mm (D) x 16 mm (H)
Page 2

5 RS232 Interface
5.1 Pin-out
5.2 Signals
Pin
DTE
Signal DTE to DCE Direction DCE to DTE Direction Description
1
CD
Input
Output
Not connected
2
RxD
Input
Output
Received data
3
TxD
Output
Input
Transmitted data
4
DTR
Output
Input
Not Connected
5
GND
N/A
N/A
Signal ground
6
DSR
Input
Output
Not Connected
7
RTS
Output
Input
Request to Send
8
CTS
Input
Output
Clear to Send
9
Vcc
Input
Input
Power supply
5.3. Factory Settings
The factory settings of COM port are as follows:
Baud rate: 19200 bps
Data bit: 8
Parity: none
Stop bit: 1
Flow control: H/W
Others: please refer to section 7.5 AT Command Set.
Page 3

6 Installation
6.1 Hardware Structure
The figure below is an outline of the adaptor.
1. Power LED
2. Data LED
3. Link LED
4. RS232
connector
5. Slide
Switch
6. Mini USB
Connector
7. Reset Button
8. Antenna
Connector
6.2 Reset Button
By pressing the Reset button, you can:
Disconnect and reconnect a wireless connection (after a short press).
Restore the factory settings (after over three seconds’ press).
6.3 Slide Switch
The slide switch can swap TXD/RXD and CTS/RTS signals.
By switching, you can set the adaptor either as a DTE (towards antenna
connector) or a DCE (towards RS232 connector).
Page 4

6.4 Power Supply
The adaptor can be powered via:
An AC/DC converter (output power: +5 to +6 V DC/300 mA)
A USB cable
Pin 9 of the DB 9-pin connector
6.5 LED Status
The following is LED status information.
Status Descrip
tion
All LED on/off three times
Device boot OK.
Power LED on
Transmitting data.
Link LED off
No pairing established.
Link LED fast (0.1 sec) blinking
Pairing
Link LED fast (0.3 sec) blinking
Discoverable and waiting for a
connection (slave mode)
Link LED slow (0.9 sec) blinking
Inquiring (master mode).
Link LED very slow (1.2 sec) blinking
Connecting (master mode).
Link LED steadily on
Connection established.
6.6 Installation Procedure
Step 1: If provided with an external antenna, assemble it to the
adaptor body.
Step 2: Plug the adaptor into the COM port of device.
Step 3: Adjust the slide switch, depending on whether the device
is a DCE or DTE.
Step 4: Power the adaptor on.
Step 5: Configure the adaptor if necessary.
7 Usage
You can reprogram the default settings on the adaptor using
HyperTerminal.
7.1 HyperTerminal Se
ttings
Bits per second: 19200 bps (baud rate)
Data bit: 8
Parity: None
Stop bit: 1
Flow control: H/W
Page 5

7.2 Configuration Start-up
Step 1: Plug the adaptor into a COM port of PC.
Step 2: Power the adaptor on.
Step 3: Create a HyperTerminal file.
Step 4: On the interface of the new Hyper Terminal file, click Properties
Button.
Step 5: Select the COM port where the adaptor is attached to your PC
and set the port properties as described in section 7.1 Hyper Terminal
Settings.
Step 6: Input “A” in the file.
If no echo, that is, nothing is displayed when you input “A”, it indicates
that the baud rate is incorrect. Ensure that the baud rate is 19200 bps.
Step 7: Input “AT”, and then press <Enter>. “OK” is displayed.
If necessary, reprogram the configuration of adaptor using AT
commands. For related commands, please refer to section 7.5 AT
Command Set.
7.3 Master Role Configuration
You can use “AT+ROLEM” to change the adaptor to the master role.
When the adaptor is in the master role, you can use “AT+ACON-” to
manually set up a connection and “AT+FIND?” to find the device you
want to connect.
7.4 Configure Master-Slave adaptor pair
Please refer to configuration utility software (Section 8) to configure a
master slave adaptor pair. Once the configuration is done, the pair will
connect to each other automatically.
7.5 AT Command Set
The following is the AT command set for the local adaptor in the
command mode (that is, the local adaptor is in the disconnection state).
All the commands and parameters are case insensitive.
Please note “AT+FIND” command is available only when the adaptor is
in the manual master role. In other words, you should send
“AT+ROLEM”, “AT+ACON-” before sending “AT+FIND command“
Page 6

Command
Descrip tion
+++
Switch the device from online Data mode to online
command mode while maintaining the connection t
o the
remote device. The characters should be send with 1000
ms guard time..
AT
Check the serial UART port settings of the adapter
.
AT+VER
Inquire the current firmware version
AT+ENQ
Lists all the settings along with their brief description.
The settings include serial port, Bluetooth related and
other misc settings
AT+ACON
Enable/disable auto-connection feature in master role.
Note, it will cause a reboot.
ACON+ (Default)
Automatically connect to the adapter specified in
AT+BOND=xxxxxxx. If no device is specified then connect
to any device which is ready to accept connection.
ACON-
Disable auto-connection feature. After it is executed,
you need to execute “AT+CONN” to manually connect a
remote device.
ACON?
Inquire the current setting.
AT+CONN
Establish a connection. It is available only when the
adapter is in the manual master role.
AT+CONN
Connect to the specified bonded device. It is available
only when AT+BOND=xxxxxxxxxx is executed where
“xxxxxxxxxxxx” is the 12 hex digit string specifying
remote device bluetooth address.
AT+CONN=xxxxxxxxxxxx
Connect the adaptor to a specified Bluetooth device.
“xxxxxxxxxxxx” is 12 hexadecimal digit string specifying
remote device bluetooth address.
AT+CONNn (n=1-8)
Connect the adapter to a device in the neighborhood
found through “AT+FIND?”
AT+DROP
Drop the connection when the device is in either master
or slave role. It is only allowed when the device is
in connected state
AT+ADDR
AT+ADDR?
Inquire the Bluetooth address of the local adapter.
AT+BOND
For security purpose, this command is used to specify a
unique remote Bluetooth serial adapter to be connected.
In the master role, the adaptor pairs and connects with
the designated remote slave address. In the slave mode,
this command is a filter condition to accept the inquiry of
the master device.
AT+BOND=xxxxxxxxxxxx
“xxxxxxxxxxxx” is a string of 12 hexadecimal digits
specifying the slave Bluetooth Device address.
AT+BOND-
Restore the status in which the adapter can connect with
any remote address.
AT+BOND?
Inquire the designated address that can be paired and
connected.
Page 7

Command
Description
AT+FIND
Search for any Bluetooth device in the neighborhood within
one minute. If any device is found, its name and address will
be listed. The search ends with a message “Inquiry ends. xx
device(s) found.”
This command is available only when the adaptor is in the
manual master role.
AT+FIND?
Start the inquiry
AT+FIND-
Cancel the ongoing inquiry
AT+ROLE
Specify whether the adaptor is in the master or slave role.
If the device role is changed, the adaptor will reboot and all
paired records will be cleared.
AT+ROLEM
Set the adaptor to the master role.
AT+ROLES (default)
Set the adaptor to the slave role.
AT+ROLE?
Inquire the current role of the adaptor.
AT+NAME
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”.
AT+NAME=xxxxx
“xxxxx” is a character string with a maximal length of 16.
AT+NAME?
Inquire the name of the local adaptor.
AT+PIN Specify a PIN. The default PIN is“1234”. Paired adaptors
should have a same PIN.
AT+PIN=xxxx
“xxxx” is a 4-8 digit string.
AT+PIN-
Cancel authentication by PIN.
AT+PIN?
Inquire the current PIN.
AT+RCFG
Enables/disable remote configuration from a remote device
by executing the remote access handshaking protocol.
AT+RCFG+ (Default)
Enables remote configuration.
AT+RCFG-
Enables remote configuration.
AT+RCFG?
Inquire the current setting
AT+DCOV
Specify whether the adapter can bediscovered by remote
device.
AT+DCOV+ (Default)
Device is in discoverable state.
AT+DCOV-
Device is non discoverable.
AT+DCOV?
Inquire the current discoverability status.
AT+RESP Specify whether result messages are prompted when AT
commands are executed.
The result messages are: OK/ERROR for command execution,
or CONNECT/DISCONNECT for connection status.
AT+RESP+ (default)
Prompt result messages.
AT+RESP-
Not prompt result messages.
AT+RESP?
Inquire the current setting.
Page 8

Command
Descrip tion
AT+FLOW
Enables or disables RTS/CTS signals handshaking of the UART
port. Note, the setting will cause a reboot
AT+FLOW-
Disable RTS/CTS flow control
AT+FLOW+ (Default)
Enable RTS/CTS flow control
AT+FLOW?
Inquire the current setting
AT+BAUD Specify the baud rate of COM port.
AT+BAUD10
1200 bps
AT+BAUD11
2400 bps
AT+BAUD12
4800 bps
AT+BAUD13
9600 bps
AT+BAUD14 (default)
19200 bps
AT+BAUD15
38400 bps
AT+BAUD16
57600 bps
AT+BAUD17
115200 bps
AT+BAUD18
230.4 Kbps
AT+BAUD?
Inquire the current baud rate.
AT+PAR
Specify parity bit setting of COM port.
AT+PAR0(default)
None parity bit.
AT+PAR1
Odd parity.
AT+PAR2
Even parity
AT+PAR?
Inquire the current setting.
AT+SLEEP
Enable/disable auto-power saving feature of RS232 driver
AT+SLEEP- (default)
Disable auto power saving
AT+SLEEP+
Enable auto power saving
AT+SLEEP?
Inquire the current setting.
AT+STOP
Specify one or two stop bits of COM port.
AT+STOP1(default)
One stop bit.
AT+STOP2
Two stop bits.
AT+STOP?
Inquire the current setting.
AT+ESC
Disable/Enable escape sequence “+++” handling.
AT+ESC-
Disable escape sequence handling.
AT+ESC+ (default)
Enable escape sequence handling.
AT+ESC?
Inquire the current setting.
Page 9

Command
Descrip tion
AT+ECHO
Enable/disable echo of command characters from
bluetooth device.
AT+ECHO-
Disable echo
AT+ECHO+ (default)
Enable echo
AT+ECHO?
Inquire the current setting
AT+RSSI
Inquire the RSSI value for current bluetooth connection.
This command is only available when the device is in
connected state.
AT+RESET
Restore the default settings and reboot.
Page 10

8. Windows configuration software
The LM149 Configuration Software allows easy setup of LM058
RS232 Bluetooth serial adapters.
To start the configuration software click “Get Device Info” in
order to view current settings of LM058 adapter.
Once you have setup the configuration that you require you will
then need to click “program Device”.
The LM058 can also be paired via the configuration program
using the “pair Device” button. It takes you to the page which
provides option for pairing/Unpairing adapters.
If you want to set the adapter back to the factory default settings
please click the “Reset Device” button.
Page 11

9. Warranty and Disposal Noce
One (1) Year Internaonal warranty
Your LM Technologies LM058 is warranted by your supplier for a
period of one (1) year from the original data of purchase under
the terms and condions of this warranty. This warranty covers
materials and manufacturing defects. Your supplier will require
proof of purchase before replacing the defecve product.
Important Noce
DISPOSAL OF OLD ELECTRICAL AND ELECTRONIC EQUIPMENT
The symbol indicates that this product shall not be mixed with
unsorted municipal waste when disposed of. There is separate
collecon system for waste electrical and electronic equipment.
Usually old electrical and electronic equipment can be returned
free of charge. For further informaon please contact the competent
municipal authories or shop where you purchased the product.
Correct disposal ensures that waste electrical and electronic
Equipment is recycled and reused appropriately. It helps avoid
potenal damage for the environment and human health and to
preserve natural resources.
Page 12

Copyright © LM Technologies Ltd - 2010