Bluetooth RS232 Serial Adapter
Manual
Document Version: 1.3
Firmware Version: 6.5x
LM048 LM058
Document History
Revision Date Name Description
1.0
1.1
1.2
25-03-
2011
16-05-
2011
15-02-
2012
SV
PM
SV
Initial version
Add CE Certificates
1.3 14-05-
2013
SV
1. Add LM058 Hardware
Structure
2. Update LM149
Configuration Software screenshot
Added FCC Regulation
Statement
Table of contents
1
2
Introduction
Features
3
4
Package
General Specification
5 RS232 Interface
5.1 Pin-out
5.2 Signals
5.3 Factory Settings
6 Installation
6.1 LM048 Hardware Structure
6.2 LM058 Hardware Structure
6.3 Reset Button
6.4 Slide Switch
6.5 Power Supply
6.6 Antenna Connector (LM058 only)
9
10
6.7 LED Status
6.8 Installation Procedure
7 Usage
7.1 Hyperterminal Settings
7.2 Configuration Setup
7.3 Master Role Configuration
7.4 Configure Master Slave adapter pair
7.5 3 wire configuration
7.6 5 wire configuration
7.7 7 wire configuration
7.8 AT Command Set
7.9 Modem Signal Settings
8 Windows Configuration Software
Warranty and Disposal Notice
FCC Regulation Statement
LM048 CE Certificate
LM058 CE Certificate
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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)
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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 Specification
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
Connection
Signal
Up to 100 Meters
Point-to-Point (piconet)
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
Modulation
Tx. power
Rx. Sensitivity
1,600/sec, 1MHz channel space
GFSK-1 Mbps, DQPSK-2 Mbps, and 8-DPSK-3 Mbps
Max. 18 dBm (Class 1)
-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
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5
5.1
Dimensions
RS232 Interface
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)
Pin-out
Signals 5.2
Pin
DTE
Signal
DTE to DCE
Direction
DCE to DTE
Direction
Description
1
2
3
4
5
6
7
8
9
CD
RxD
TxD
DTR
GND
DSR
RTS
CTS
Vcc
Input
Input
Input
Input
Input
Output
Output
N/A
Output
Output Not connected
Output Received data
Input Transmitted data
Input Data Terminal Ready
N/A Signal ground
Output Data Set Ready
Input Request to Send
Output Clear to Send
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.
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6
6.1
Installation
LM048 Hardware Structure
The figure below is an outline of the adapter.
1. Link LED 2. Data LED 3. Power LED
6.2
5. RS232 connector
6. Slide Switch
LM058 Hardware Structure
7. Reset Button
4. Mini USB connector
1. Power LED
5. Slide
Switch
2. Data LED
6. Mini USB
Connector
3. Link LED 4. RS232 connector
7. Reset Button 8. Antenna
Connector
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6.3
6.4
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).
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
6.7
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.
LED Status
The following is LED status information.
Status Description
All LED on/off three times Device boot OK.
Data LED on
Link LED off
Link LED fast (0.1 sec) blinking
Transmitting/Receiving data.
No pairing established.
Pairing
Link LED fast (0.3 sec) blinking
Link LED slow (0.9 sec) blinking
Discoverable and waiting for a connection (slave mode)
Inquiring (master mode).
Link LED very slow (1.2 sec) blinking Connecting (master mode).
Link LED steadily on Connection established.
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6.8
7
7.1
7.2
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.
Usage
You can reprogram the adapter settings using HyperTerminal.
HyperTerminal Settings
Bits per second: 19200 bps (baud rate)
Data bit: 8
Parity: None
Stop bit: 1
Flow control: None
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.
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7.3
7.4
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.
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
7.8
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
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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+++
AT
AT+VER
AT+ENQ
Command
AT+ACON
ACON+ (default)
AT+CONN
ACON-
ACON?
AT+CONN
AT+CONN=xxxxxxxxxxxx
AT+CONNn (n=1-8)
AT+DROP
AT+ADDR
AT+ADDR?
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..
Check the serial port communication with the adapter
Inquire the current firmware version
Lists all the settings along with their brief description.
The settings include serial port, Bluetooth related and other misc settings
Enable/disable auto-connection feature in master role.
Note: This command will cause a reboot.
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.
Disable auto-connection feature. After it is executed, you need to execute “AT+CONN” to manually connect a remote device.
Inquire the current setting
Establish a connection. It is available only when the adapter is in the manual master role.
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.
Connect the adapter to a specified Bluetooth device.
“xxxxxxxxxxxx” is 12 hexadecimal digit string specifying
Remote device Bluetooth address
Connect the adapter to a device in the neighborhood found through “AT+FIND?”. N is the index of the discovered Bluetooth device during inquiry
Drop the connection when the device is in either master or slave role. It is only allowed when the device is in connected state
Inquire the Bluetooth address of the local adapter.
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AT+BOND
AT+BOND=xxxxxxxxxxxx
AT+BOND-
AT+BOND?
AT+FIND
AT+FIND?
AT+FIND-
AT+ROLE
AT+ROLEM
AT+ROLES (default)
AT+ROLE?
AT+NAME
AT+NAME=xxxxx
AT+NAME?
AT+PIN
AT+RCFG
AT+PIN=xxxx
AT+PIN-
AT+PIN?
AT+RCFG+
AT+RCFG- (default)
AT+RCFG?
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.
“xxxxxxxxxxxx” is a string of 12 hexadecimal digits specifying the slave Bluetooth Device address.
Restore the status in which the adapter can connect with any remote address.
Inquire the designated address that can be paired and connected.
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.
Start the inquiry
Cancel the ongoing inquiry
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.
Set the adapter to the master role.
Set the adapter to the slave role.
Inquire the current role of the adapter.
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”.
“xxxxx” is a character string with a maximal length of 16.
Inquire the name of the local adapter.
Specify a PIN. The default PIN is“1234”. Paired adapters should have a same PIN.
“xxxx” is a 4-8 digit string.
Cancel authentication by PIN.
Inquire the current PIN.
Enables/disable remote configuration from a remote device by executing the remote access handshaking protocol.
Disables remote configuration.
Inquire the current setting
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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-
AT+DCOV?
Device is non discoverable.
Inquire the current discoverability status.
Specify whether result messages are prompted when AT
AT+RESP
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-
AT+RESP?
Not prompt result messages.
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+
AT+FLOW?
Enable RTS/CTS flow control
Inquire the current setting
AT+BAUD
Specify the baud rate of COM port.
AT+BAUD10
AT+BAUD11
AT+BAUD12
1200 bps
2400 bps
4800 bps
AT+BAUD13 9600 bps
AT+BAUD14 (default) 19200 bps
AT+BAUD15
AT+BAUD16
38400 bps
57600 bps
AT+BAUD17
AT+BAUD18
115200 bps
230.4 Kbps
AT+BAUD19
AT+BAUD20
AT+BAUD?
460.8 Kbps
921.6 Kbps
Inquire the current baud rate.
AT+PAR
AT+PAR0(default)
AT+PAR1
AT+PAR2
AT+PAR?
Specify parity bit setting of COM port.
None parity bit.
Odd parity.
Even parity
Inquire the current setting.
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AT+SLEEP
AT+SLEEP- (default)
AT+SLEEP+
AT+SLEEP?
AT+STOP
AT+STOP1(default)
AT+STOP2
AT+STOP?
AT+ESC
AT+ESC-
AT+ESC+ (default)
AT+ESC?
AT+ECHO
AT+ECHO-
Enable/disable auto-power saving feature of adapter
Disable auto power saving
Enable auto power saving
Inquire the current setting.
Specify one or two stop bits of COM port.
One stop bit.
Two stop bits.
Inquire the current setting.
Disable/Enable escape sequence “+++” handling.
Disable escape sequence handling.
Enable escape sequence handling.
Inquire the current setting.
Enable/disable echo of command characters from bluetooth device.
Disable echo
AT+ECHO+ (default) Enable echo
AT+ECHO?
AT+RSSI
AT+MODEM
AT+MODEM- (default)
Inquire the current setting
Inquire the RSSI value for current bluetooth connection.
This command is only available when the device is in connected state.
Enable/disable RS232 modem signals. This command is used in conjunction with AT+FLOW command
Disable Modem Signals
AT+MODEML
AT+MODEMR
Enable Local loopback. RS232 signals are looped back with each other, depending on flow control setting
Enable Remote transfer. RS232 signals will be transferred over bluetooth link depending on flow control setting
AT+MODEM?
AT+RESET
Inquire the current setting
Restore the default settings and reboot.
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7.9
FLOW-
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)
FLOW-
FLOW+
MODEM SIGNAL
(AT+MODEM)
MODEM-
MODEM-
MODEML
RS232 SIGNALS Description
Tx, Rx, GND
Tx, Rx, GND,
RTS, CTS
Tx, Rx, GND,
RTS<->CTS,
DTR<->DSR
3 wire configuration
RTS CTS signals are used for data flow control between host and adapter, and NOT transferred to remote side wirelessly.
RTS looped back to CTS,
DTR looped back to DSR
FLOW+
Modem Signal Settings
MODEML Tx, Rx, GND,
RTS, CTS,
RTS CTS signals used for data flow control
DTR<->DSR 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.
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8.
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.
Windows configuration software
T he 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”.
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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.
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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.
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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.
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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.
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Copyright © LM Technologies Ltd - 2013
