LM Technologies LM048 User manual

Bluetooth RS232 Serial Adapter Manual
Document Version: 1.0
Firmware Version: 6.5x
LM048 LM058
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Document History
Revision Date Name Description
1.0 25-03-2011 SV Initial Version
1.1 16-05-2011 PM Add CE Certs
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Table of contents
1. Introduction Page 1
2. Features Page 1
3. Package Page 2
4. General Specication Page 2
5. RS 232 Interface Page 3
5.1 Pin Out Page 3
5.2 Signals Page 3
5.3 Factory Settings Page 4
6. Installation Page 4
6.1 Hardware Structure Page 4
6.2 Reset Button Page 4
6.3 Slide Switch Page 5
6.4 Power Supply Page 5
6.5 LED Status Page 5
6.6 Installation procedure Page 6
7. Usage Page 6
7.1 Hyperterminal Settings Page 6
7.2 Conguration Start up Page 6
7.3 Master Role Conguration Page 7
7.4 Congure Master-Slave Adapter pair Page 7
7.5 3 wire conguration Page 7
7.6 5 wire conguration Page 7
7.7 7 wire conguration Page 8
7.8 AT Command set Page 8-15
7.9 Modem Signals Page 15-17
8. Windows conguration software Page 18
9. Warranty, Help and Support Page 19
10. Disposal notice Page 20
11. LM048 and LM058 CE Declaration Page 21-22
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1. Introduction
Welcome to the LM Technologies Bluetooth RS232 Serial adapter user
manual. 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 ow 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 benecial 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 prole and Generic Access prole
• No need of external host and software
• Ease of installation, maintenance and use
• Supports conguration of local device
• Range up to 100 meters (open space)
• Support of RTS/CTS data ow 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
• Certied by leading Serial Printer Manufacturers like Casio, Star
Micronics and Casio
• Supports External SMA Antenna (LM058 only)
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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 Specication
Specication 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 Metres
Connection Point-to-Point (piconet)
Signal TxD, RxD, GND, RTS, CTS, DTR, DSR
RS-232 Interface D_SUB 9-pin female
Standard Bluetooth Specication v2.1+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 Chip antenna
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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
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
5GND 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
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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.
6. Installation
6.1 Hardware Structure
The gure 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 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).
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6.3 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).
6.4 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
6.5 LED Status
The following is LED status information.
Status Description
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 con-
nection (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.
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6.6 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: Congure the adapter 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 Settings
Bits per second: 19200 bps (baud rate)
Data bit: 8
Parity: None
Stop bit: 1
Flow control: None
7.2 Conguration Start-up
Step 1: Plug the adapter into a COM port of PC.
Step 2: Power the adapter on.
Step 3: Create a HyperTerminal le.
Step 4: On the interface of the new Hyper Terminal le, 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.
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Step 6: Input “A” in the le.
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 conguration of adapter using AT
commands. For related commands, please refer to section 7.8 AT
Command Set.
7.3 Master Role Conguration
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 nd the device you
want to connect.
7.4 Congure Master-Slave adapter pair
Please refer to conguration utility software (Section 8) to congure a
master slave adapter pair. Once the conguration is done, the pair will
connect to each other automatically.
7.5 3 wire conguration (Tx, Rx, GND)
The default conguration is the 3 wire conguration in which only Tx,
Rx and GND lines are used. Set the 3 wire conguration by sending
AT+FLOW- and AT+MODEM- command.
7.6 5 wire conguration (Tx, Rx, GND, RTS, CTS)
Set 5 wire conguration which uses RTS, CTS ow control signals by
sending AT+FLOW+ and AT+MODEM- command. RTS, CTS status is not
transferred wirelessly over Bluetooth link to the remote side.
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7.7 7 wire conguration (Tx, Rx, GND, RTS, CTS, DTR, DSR)
Set 7 wire conguration by sending AT+FLOW+ and AT+MODEMR
command. RTS, CTS lines are used for local ow 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“
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Command Description
+++ 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 UART port settings of the
adapter.
AT+VER Inquire the current rmware 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
specied in AT+BOND=xxxxxxx. If no
device is specied 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.
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AT+CONN Connect to the specied 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 specied
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 adapter pairs and
connects with the designated remote
slave address. In the slave mode,
this command is a lter 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.
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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 “rst space or -, last
space or – isn’t permitted”. The default
name is “Serial Adapter”.
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AT+NAME=xxxxx “xxxxx” is a character string with a maxi-
mal 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 conguration from
a remote device by executing the remote
access handshaking protocol.
AT+RCFG+ Enables remote conguration.
AT+RCFG- (default) Disables remote conguration.
AT+RCFG? Inquire the current setting
AT+DCOV Specify whether the adapter can be
discovered 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 execut-
ed. The result messages are: OK/ERROR
for command execution, or CONNECT/
DISCONNECT for connection status.
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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 ow control
AT+FLOW+ Enable RTS/CTS ow 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.
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AT+PAR1 Odd parity.
AT+PAR2 Even parity
AT+PAR? Inquire the current setting.
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
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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 ow control setting
AT+MODEMR Enable Remote transfer. RS232 signals
will be transferred over bluetooth link
depending on ow control setting
AT+MODEM? Inquire the current setting
AT+RESET Restore the default settings and reboot.
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 SIG-
NALS
Description
FLOW- MODEM- Tx, Rx, GND 3 wire
conguration
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FLOW+ MODEM- Tx, Rx, GND,
RTS, CTS
RTS CTS
signals are used
for data ow
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 ow control
between host
and adapter,
and NOT
transferred to
remote side
wirelessly. DTR
looped back
to DSR. This
conguration
is equivalent to
LM048 adapter
running v4.5x
rmware.
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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
conguration
is equivalent
to LM048
SPA Adapter
running v4.6X
rmware.
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