LM Technologies LM048 User manual

Bluetooth
RS232 Serial A dapt er
Manual
Document Version: 1.3
Firmware Version: 6.5x
LM048 LM058

Document History
Revision
Date
Name
Description
1.0
25-03-
2011
SV
Initial version
1.1
16-05-
2011
PM
Add CE Certificates
1.2
15-02-
2012
SV
1. Add LM058 Hardware
Structure
2. Update LM149
Configuration Software
screenshot
1.3
14-05-
2013
SV
Added FCC Regulation
Statement

Table of contents
1
Introduction
Page 1
2
Features
Page 1
3
Package
Page 2
4
General Specification
Page 2
5
RS232 Interface
Page 3
5.1
Pin-out
Page 3
5.2
Signals
Page 3
5.3
Factory Settings
Page 3
6
Installation
Page 4
6.1
LM048 Hardware Structure
Page 4
6.2
LM058 Hardware Structure
Page 4
6.3
Reset Button
Page 5
6.4
Slide Switch
Page 5
6.5
Power Supply
Page 5
6.6
Antenna Connector (LM058 only)
Page 5
6.7
LED Status
Page 5
6.8
Installation Procedure
Page 6
7
Usage
Page 6
7.1
Hyperterminal Settings
Page 6
7.2
Configuration Setup
Page 6
7.3
Master Role Configuration
Page 7
7.4
Configure Master Slave adapter pair
Page 7
7.5
3 wire configuration
Page 7
7.6
5 wire configuration
Page 7
7.7
7 wire configuration
Page 7
7.8
AT Command Set
Page 7
7.9
Modem Signal Settings
Page 12
8
Windows Configuration Software
Page 13
9
Warranty and Disposal Notice
Page 15
10
FCC Regulation Statement
Page 16
LM048 CE Certificate
Page 18
LM058 CE Certificate
Page 19

1. Introduction
Welcome to the LM Technologies Bluetooth RS232 Serial adapter. The
LM048/LM058 adapter eliminates your conventional RS232 serial
cables, providing an easy-to-use, invisible connection with superior
freedom of movement. This adapter allows any device with a
standard 9-pin serial port to communicate wirelessly.
This adapter can use both RTS/CTS flow control or DTR/DSR
handshaking. This adapter is capable emulating a serial cable in true
sense by transferring all the RS232 controls signals (RTS, CTS, DTR
and DSR) wirelessly to the remote side over a bluetooth link. This
capability is beneficial in case of Serial Printers which report error
conditions like “Out of Paper”, “Power failure” etc by de-asserting
the DTR or RTS lines.
This adapter is mostly used in pairs as serial cable replacement.
However, you can communicate with another Bluetooth serial
adapter 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 software
Ease of installation, maintenance and use
Supports configuration of local device
Supports up to 100 meters (open space)
Support of RTS/CTS data flow control
Support of DTR/DSR handshaking
Ability to transfer RTS, CTS, DTR and DSR signals wirelessly over
bluetooth link. This unique signal handling feature is used in
reporting messages such as “Out of Paper” or “Off Line” from a
Serial Printer back to the PC or Terminal equipment
Certified by leading Serial Printer Manufacturers like Casio, Star
Micronics and Casio
Supports External SMA Antenna (LM058 only)
Page 1

3. Package
Bluetooth serial adapter
DB9 male to female converter
USB cable for power supply
User manual
Warranty Card
2Dbi Antenna (LM058 only)
Optional:
9 pin to 25 pin converter
All in one power supply (UK, EU and US Plug)
4. General S pecific a tion
Specification
Description
Baud Rate
1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2/230.4/460.8/
921.6 Kbps
Coverage
Up to 100 Meters
Connection
Point-to-Point (piconet)
Signal
TxD, RxD, GND, RTS, CTS, DTR, DSR
RS-232 Interface
D_SUB 9-pin female
Standard Bluetooth
v2.0+EDR. v2.1 +EDR firmware also available
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
Chip antenna
Antenna Gain
Max. 1 to 2 dBi
Power Supply
+4 to +12 V DC
Current Consumption
Max. 90 mA
Operation Temperature
-20°C to +75°C
Page 2

Dimensions
LM048: 46.3 mm (W) x 34 mm (D) x 16 mm (H)
LM058: 35 mm (W) x 65 mm (D) x 16 mm (H)
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
Data Terminal Ready
5
GND
N/A
N/A
Signal ground
6
DSR
Input
Output
Data Set Ready
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: None
Others: please refer to section 7.8 AT Command Set.
Page 3

6 Installation
6.1 LM048 Hardware Structure
The figure below is an outline of the adapter.
1. Link LED
2. Data LED
3. Power LED
4. Mini USB
connector
5. RS232
connector
6. Slide Switch
7. Reset Button
6.2 LM058 Hardware Structure
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
Page 4

6.3 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).
6.4 Slide Switch
The slide switch can swap TXD/RXD, RTS/CTS and DTR/DSR signals.
Using this switch, you can set the adapter either as a DTE (towards
antenna connector) or a DCE (towards RS232 connector).
6.5 Power Supply
The adapter can be powered via:
An AC/DC converter (output power: +5 to +12 V DC/300 mA)
A mini- USB cable
Pin 9 of the RS232 DB9 connector
6.6 Antenna Connector (LM058 only)
The LM058 has a Reverse Polarity (RP) SMA Antenna Connector to
connect the 2dBi antenna provided with it. User can also connect a
high gain antenna instead of 2 dBi antenna to increase the range.
6.7 LED Status
The following is LED status information.
Status
Descrip tion
All LED on/off three times
Device boot OK.
Data LED on
Transmitting/Receiving 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.
Page 5

6.8 Installation Procedure
Step 1: Plug the adapter into the COM port of device.
Step 2: Adjust the slide switch, depending on whether the device
is a DCE or DTE.
Step 3: Power the adapter on.
Step 4: Configure the adapter using LM149 Software if necessary.
Note: The UART settings on adapter should match the COM Port
settings on the device.
7 Usage
You can reprogram the adapter settings using HyperTerminal.
7.1 HyperTerminal Se ttings
Bits per second: 19200 bps (baud rate)
Data bit: 8
Parity: None
Stop bit: 1
Flow control: None
7.2 Configuration Start-up
Step 1: Plug the adapter into a COM port of PC.
Step 2: Power the adapter 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 adapter 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 COM port settings are incorrect or slide switch is in the wrong
position.
Step 7: Input “AT”, and then press <Enter>. “OK” is displayed.
If necessary, reprogram the configuration of adapter using AT
commands. For related commands, please refer to section 7.8 AT
Command Set.
Page 6

7.3 Master Role Configuration
You can use “AT+ROLEM” to change the adapter to the master role.
When the adapter 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 adapter pair
Please refer to configuration utility software (Section 8) to configure a
master slave adapter pair. Once the configuration is done, the pair will
connect to each other automatically.
7.5 3 wire configuration
The default configuration is the 3 wire configuration in which only
Tx, Rx and GND lines are used. Set the 3 wire configuration by
sending AT+FLOW- and AT+MODEM- command.
7.6 5 wire configuration (Tx, Rx, GND, RTS, CTS)
Set 5 wire configuration which uses RTS, CTS flow control signals by
sending AT+FLOW+ and AT+MODEM- command. RTS, CTS status is
not transferred wirelessly over Bluetooth link to the remote side.
7.7 7 wire configuration (Tx, Rx, GND, RTS, CTS, DTR, DSR)
Set 7 wire configuration by sending AT+FLOW+ and AT+MODEMR
command. RTS, CTS lines are used for local flow control between
device and adapter. DTR, DSR lines are used for handshaking
between local device and remote connected device. The DTR, DSR
line status is transmitted wirelessly over bluetooth link
For all settings refer section 7.9
7.8 AT Command Set
The following is the AT command set for the local adapter in the
command mode (that is, the local adapter is in the disconnection state).
All the commands and parameters are case insensitive.
Please note “AT+FIND?” command is available only when the adapter is
in the manual master role. In other words, you should send
“AT+ROLEM”, “AT+ACON-” before sending “AT+FIND? command“
Page 7

Command
Descrip tion
+++
Switch the device from online Data mode to online
command mode while maintaining the connection to the
remote device. The characters should be send with 1000
ms guard time..
AT
Check the serial port communication with 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: This command 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 adapter 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?”. N is the index of the
discovered Bluetooth device during inquiry
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.
Page 8

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 adapter 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.
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 adapter is in the
manual master role.
AT+FIND?
Start the inquiry
AT+FIND-
Cancel the ongoing inquiry
AT+ROLE
Specify whether the adapter is in the master or slave
role.If the device role is changed, the adapter will reboot
and all paired records will be cleared.
AT+ROLEM
Set the adapter to the master role.
AT+ROLES (default)
Set the adapter to the slave role.
AT+ROLE?
Inquire the current role of the adapter.
AT+NAME
Specify a name for the adapter. 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 “SerialADT”.
AT+NAME=xxxxx
“xxxxx” is a character string with a maximal length of 16.
AT+NAME?
Inquire the name of the local adapter.
AT+PIN
Specify a PIN. The default PIN is“1234”. Paired adapters
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+
Enables remote configuration.
AT+RCFG- (default)
Disables remote configuration.
AT+RCFG?
Inquire the current setting
Page 9

AT+DCOV
Specify whether the adapter can be discovered by remote
device. Changing this value causes a reboot.
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.
AT+FLOW
Enables or disables RTS/CTS signals handshaking of the
UART port. Note, the setting will cause a reboot
AT+FLOW- (default)
Disable RTS/CTS flow control
AT+FLOW+
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+BAUD19
460.8 Kbps
AT+BAUD20
921.6 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.
Page 10

AT+SLEEP
Enable/disable auto-power saving feature of adapter
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.
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+MODEM
Enable/disable RS232 modem signals. This command is
used in conjunction with AT+FLOW command
AT+MODEM- (default)
Disable Modem Signals
AT+MODEML
Enable Local loopback. RS232 signals are looped back
with each other, depending on flow control setting
AT+MODEMR
Enable Remote transfer. RS232 signals will be transferred
over bluetooth link depending on flow control setting
AT+MODEM?
Inquire the current setting
AT+RESET
Restore the default settings and reboot.
Page 11

7.9 Modem Signal Settings
The modem signal setting is used in conjunction with AT+FLOW
setting to enable/disable RS232 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.
Page 12

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.
8. Windows configuration software
The LM149 Configuration Software allows easy setup of
LM048/LM058 RS232 Bluetooth serial adapters.
To start the configuration software click “Read Settings” or “Get
Device Info” in order to view current settings of LM048/LM058
adapter. Once you have setup the configuration that you require
you will then need to click “Save Settings”or “Program Device”.
Page 13

The LM048/LM058 can also be paired via the configuration
program using the “Pairing” 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 “Restore Factory Settings” button.
Page 14

9. Warranty and Disposal Notice
One (1) Year International warranty
Your LM Technologies LM048/LM058 is warranted by your supplier
for a period of one (1) year from the original data of purchase under
the terms and conditions of this warranty. This warranty covers
materials and manufacturing defects. Your supplier will require
proof of purchase before replacing the defective product.
Important Notice
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
collection system for waste electrical and electronic equipment.
Usually old electrical and electronic equipment can be returned
free of charge. For further information please contact the competent
municipal authorities or shop where you purchased the product.
Correct disposal ensures that waste electrical and electronic
Equipment is recycled and reused appropriately. It helps avoid
potential damage for the environment and human health and to
preserve natural resources.
Page 15

10. FCC Regulation Statement
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
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.
Installation and use of this device must be in strict accordance
with the instructions included in the user documentation provided
with the product. Any changes or modifications (including the
antennas) made to this device that are not expressly approved by
the manufacturer may void the user’s authority to operate the
equipment. The manufacturer is not responsible for any radio or
television interference caused by unauthorized modification of
this device, or the substitution of the connecting cables and
equipment other than manufacturer specified. It is the
responsibility of the user to correct any interference caused by
such unauthorized modification, substitution or attachment.
Page 16

Manufacturer and its authorized resellers or distributors will
assume no liability for any damage or violation of government
regulations arising from failing to comply with these guidelines.
This equipment complies with FCC radiation exposure limits set
forth for an uncontrolled environment. This transmitter must not
be co-located or operating in conjunction with any other antenna
or transmitter.
Page 17