Multitech MultiConnect BT MTS2BTA User manual

MultiConnect™BT
Serial-to-Bluetooth®Adapter
MTS2BTA
MTS2BTA-R
User Guide

Copyright and Technical Support
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 2
MultiConnect BT
Serial-to-Bluetooth Adapter
MTS2BTA and MTS2BTA-R
User Guide
S000370B Rev. B
Copyright
This publication may not be reproduced, in whole or in part, without prior expressed written permission
from Multi-Tech Systems, Inc. All rights reserved.
Copyright © 2005-2007 Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranty with respect to the contents hereof and
specifically disclaims any implied warranty of merchantability or fitness for any particular purpose.
Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes
from time to time in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person
or organization of such revisions or changes.
Revision Date Description
A03/31/05 Initial release.
B 12/10/07 Update for Bluetooth protocol version 2.0. Updated the Power
Specifications.
Trademarks
Multi-Tech and the Multi-Tech logo are registered trademarks of Multi-Tech Systems, Inc. MultiConnect
is a trademark of Multi-Tech Systems, Inc. Bluetooth is a registered trademark of Bluetooth SIG, Inc. All
other brand and product names mentioned in this publication are trademarks or registered trademarks of
their respective companies.
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112 U.S.A.
[phone] or [phone]
Fax [phone]
http://www.multitech.com
Technical Support
Country By Email By Phone
Europe, Middle East, Africa [email protected] (44) 118 959 7774
U.S., Canada, all others [e-mail] 800-972-2439 or 763-717-5863

Table of Contents
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 3
Contents
Chapter 1 – Description and Specifications.............................................................................................4
Product Description....................................................................................................................................4
General Safety...........................................................................................................................................4
Handling Precautions.................................................................................................................................4
Maintenance of the Serial-to-Bluetooth Adapter........................................................................................5
Product Build Options................................................................................................................................5
Shipping Package Contents ......................................................................................................................5
AT Commands and Setup Examples.........................................................................................................5
Technical Specifications ............................................................................................................................6
RF Interface...............................................................................................................................................7
Default Power Up Settings.........................................................................................................................7
LED Indicators ...........................................................................................................................................8
Chapter 2 – Installation and Cabling.........................................................................................................9
Attaching the MultiConnect Adapter to a Fixed Location...........................................................................9
Making the Connections ..........................................................................................................................10
Directions for the MTS2BTA (Externally Powered) .................................................................................10
Directions for the MTS2BTA-R (Powered through Pin 6 of an RS-232 Cable).......................................10
Optional – Direct DC Power Connection for Use with the MTS2BTA .....................................................11
Chapter 3 – AT Commands and Configuration Examples....................................................................12
AT Command Reference Guide ..............................................................................................................12
Using AT Commands...............................................................................................................................12
Test Procedures Using AT Commands...................................................................................................15
Disabling Flow Control Using AT Commands .........................................................................................16
Configuring to Use DTR for Resetting the MTS2BTA Using AT Commands..........................................16
Chapter 4 – Peripheral Devices ...............................................................................................................17
Antenna System.......................................................................................................................................17
Pin Assignments for the Serial Port.........................................................................................................18
Appendix A – Regulatory Compliance Statements ...............................................................................19
Waste Electrical and Electronic Equipment Statement ...........................................................................19
Information on HS/TS Substances According to Chinese Standards .....................................................20
Information on HS/TS Substances According to Chinese Standards (in Chinese).................................21
Appendix B – Warranty and Repairs Policy...........................................................................................22
Multi-Tech Warranty Statement...............................................................................................................22
Index...........................................................................................................................................................24

Chapter 1 – Description and Specifications
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 4
Chapter 1 – Description and
Specifications
Product Description
The MultiConnect BT Serial-to-Bluetooth adapter utilizes Bluetooth technology to provide a secure,
standards-based wireless connection between a host and a peripheral device. Providing wireless data
transfer up to 100 meters, it completely eliminates the need for serial cable connections.
General Safety
The adapter is designed and intended to be used in either fixed or mobile applications. In the “Fixed”
application, the device is physically secured at one location and not easily moved to another location. In
the “Mobile” application, the device may be regularly moved to different locations.
Caution! Maintain a separation distance of at least 20 cm (8 inches) between the transmitter’s antenna
and the body of the user or nearby persons. The adapter is not designed for, nor intended to be, used in
applications within 20 cm (8 inches) of the body of the user. Such uses are strictly prohibited.
Radio Frequency Interference
Avoid possible radio frequency (RF) interference by carefully following the safety guidelines below.
•Switch OFF the Adapter when in an aircraft. The use of cellular telephones in aircraft is illegal. It
may endanger the operation of the aircraft and/or disrupt the cellular network. Failure to observe
this instruction may lead to suspension or denial of cellular telephone services to the offender,
legal action, or both.
•Switch OFF the Adapter in the vicinity of gasoline or diesel-fuel pumps or before filling a vehicle
with fuel.
•Switch OFF the Adapter in hospitals and any other place where medical equipment may be in use.
•Respect restrictions on the use of radio equipment in fuel depots, chemical plants, or where
blasting operations are in progress.
•There may be a hazard associated with the operation of your Adapter in the vicinity of
inadequately protected personal medical devices such as hearing aids and pacemakers. Consult
the manufacturers of the medical device to determine if it is adequately protected.
•Operation of the Adapter in the vicinity of other electronic equipment may cause interference if the
equipment is inadequately protected. Observe any warning signs and manufacturers’
recommendations.
Vehicle Safety
•Do not use your Adapter while driving.
•Respect national regulations on the use of cellular telephones in vehicles. Road safety always
comes first.
•If incorrectly installed in a vehicle, the operation of adapter could interfere with the correct
functioning of vehicle electronics. To avoid such problems, be sure that the installation has been
performed by qualified personnel. Verification of the protection of vehicle electronics should be
part of the installation.
•The use of an alert device to operate a vehicle’s lights or horn on public roads is not permitted.
Handling Precautions
All devices must be handled with certain precautions to avoid damage due to the accumulation of static
charge. Although input protection circuitry has been incorporated into the devices to minimize the effect of
this static buildup, proper precautions should be taken to avoid exposure to electrostatic discharge during
handing and operation.

Chapter 1 – Description and Specifications
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 5
Maintenance of the Serial-to-Bluetooth Adapter
Your adapter is the product of advanced engineering, design and craftsmanship and should be treated
with care. The suggestions below will help you to enjoy this product for many years.
•Do not expose the adapter to any extreme environment where the temperature or humidity is high.
•Do not attempt to disassemble the adapter. There are no user serviceable parts inside.
•Do not expose the adapter to water, rain or spilled beverages. It is not waterproof.
•Do not abuse your adapter by dropping, knocking, or violently shaking it. Rough handling can
damage it.
•Do not place the adapter alongside computer discs, credit or travel cards, or other magnetic
media. The information contained on discs or cards may be affected by the phone.
•The use of accessories not authorized by Multi-Tech or not compliant with Multi-Tech’s accessory
specifications may invalidate the warranty of the MultiConnect Adapter.
•In the unlikely event of a fault in the adapter, contact Multi-Tech Technical Support.
Product Build Options
Product Description Region
MTS2BTA Serial-to-Bluetooth Adapter (Externally Powered) Global
MTS2BTA-R Serial-to-Bluetooth Adapter (Powered through Pin 6 of an
RS-232 Cable) Global
Shipping Package Contents
MTS2BTA (Externally Powered)
•One Serial-to-Bluetooth Adapter
•One antenna
•One mounting bracket
•One power supply
•A set of four self-adhesive plastic feet
•One printed Quick Start Guide
•One MultiConnect CD containing the adapter drivers, User Guide, Quick Start Guide, AT
Commands Reference Guide, Global Wizard software, and a link to Adobe Acrobat Reader.
MTS2BTA-R (Powered by Pin 6 of an RS-232 Cable)
•One Serial-to-Bluetooth Adapter
•One antenna
•One mounting bracket
•A set of four self-adhesive plastic feet
•One printed Quick Start Guide
•One MultiConnect CD containing the adapter drivers, User Guide, Quick Start Guide, AT
Commands Reference Guide, Global Wizard software, and Acrobat Reader.
AT Commands and Setup Examples
AT commands for this Adapter are published in a separate Reference Guide included on the product CD
and posted on the Multi-Tech Web site.
This command guide includes setup examples and repeater examples.

Chapter 1 – Description and Specifications
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 6
Technical Specifications
Category Description
Standards Class 1 Bluetooth V2.0 compliant.
Notes:
Bluetooth protocol V2.0: circuit board I/O pin 7 now controls flow control.
Previously, in V1.2, the circuit board I/O pin 3 controlled flow control.
V2.0 now supports multi-point connections.
Serial Interface Supports speeds from 1200bps to 230Kbps
Data Format For Serial Interface - Asynchronous, 8-N-1, Default is 9600bps
Flow Control Hardware flow control
Modes of Operation Inquiry, Idle, Data, Fast Data, Park, Sniff, Command, Master, Slave
Device Profiles Serial Port (SPP), Dial-up Network (DUN)
Buffer Serial 50 bytes
RF 50-byte RX buffer
Dimensions 4.3" w x 2.4" h x 0.94" d (11 cm x 6.1 cm x 2.4 cm)
Weight 4.2 oz. (120 g)
Power Requirements MTS2BTA:
100mA typical/250mA maximum @ 9VDC
MTS2BTA-R:
86mA typical/200mA maximum @ 5VDC,
42mA typical/100mA maximum @ 10VDC,
29mA typical/68mA maximum @ 15VDC,
23mA typical/54mA maximum @ 20VDC,
19mA typical/45mA maximum @ 25VDC
Operating Temperature +32°to +120°F (0°to +50°C)
Humidity 25-85% noncondensing
Voltage 9VDC to 25VDC
Certifications CE Mark
EMC:
FCC Part 15 Class B
Canada (Class B)
FCC Part 15.247:2004 (Subpart C)
EN 55022
EN 55024
EN 300 328
EN 301 489-1 V1.4.1
EN 301 489-17
Safety:
cUL
UL 60950
EN 60950
Intelligent Features Supports multi-point connections
Operating System Independent
AT Command software interface
LED driver outputs for visual monitoring
Auto connect
Low power consumption
Secure and robust communication link.
•FHSS (Frequent Hopping Spread Spectrum)
•128-bit encryption; 10 alphanumeric Personal Identification Number
(PIN)
•Error correction schemes for guaranteed packet delivery
Warranty Two Years

Chapter 1 – Description and Specifications
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 7
RF Interface
Radio Characteristics
Frequency 2402 – 2480MHz
Modulation FHSS/GFSK
Channel Intervals 1MHz
Number of Channels 79CH
Transmission Rate 721Kbps
RF Receive Sensitivity -80dBm typical
RF Range Class 1 - 100 meters (330 feet)
Default Power Up Settings
AT Command Response Form = Long Form
Bluetooth Service Profile = Serial Port Profile {SPP}
Device Role = Slave
Baud Rate = 9600bps
Data Bits = 8 bits
Parity = None
Stop bits = 1 bit
Hardware Flow Control RTS/CTS = Enabled
Power Mode = Never go into deep sleep mode
Country Code = North America and Europe
Name of Device (local name) = Serial-to-Bluetooth Adapter
My Radio Status = 1,0 {slave, disconnected}
Service Name = COM0
Power up default ATSW24 settings = 0,0,0,0 {long response, no authentication, no auto SCO
connect, no minor}
Power up default ATSW25 settings = 0,1,0,0 {slave, data, allow data to pass, SPP}
Major & Minor Class Of Device (COD) = 00000000 {undefined}
Security PIN and Encryption = Disabled
Default PIN = “default” caps sensitive
Important Security PIN Note:
Do not forget your PIN. Write it down. If you forget it, there is no way it can be retrieved from
the device or the software. You will have to buy a new Bluetooth device and start over.
Page Scan Interval = 0x400 {2560msec.}
Page Scan Window = 0x200 {11msec.}
Inquiry Scan Interval = 0x400 {2560msec.}
Inquiry Scan Window = 0x200 {11msec.}
Timeout Connection Parameters
Inquiry = 60 seconds
Slave Connect = 60 seconds
Master Connect = 60 seconds
ATDM idle mode = 60 seconds
ATDM Master Mode = indefinitely (need to perform ATUCL to cancel last command)
Timeout for loss of Bluetooth connection = 4 seconds

Chapter 1 – Description and Specifications
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 8
LED Indicators
LED Description
TD Transmit Data. This LED is lit when adapter is transmitting data to another adapter.
RD Receive Data. This LED is lit when the adapter is receiving data from another adapter.
CD Carrier Detect. This LED is lit when the adapter detects a valid carrier signal from another
adapter.
It is on when the adapter is communicating with the other adapter and off when the link is
broken.
TR Terminal Ready. (Also called Data Terminal Ready.) This LED indicates the PC is turned
on and ready to communicate. This LED is lit when a data communications program
initializes the adapter. It goes off when the communications program disconnects the COM
port. When it goes off, a connected adapter will disconnect.
PWR Power. This LED Indicates the presence of DC power when lit.

Chapter 2 – Installation and Cabling
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 9
Chapter 2 – Installation and Cabling
Attaching the MultiConnect Adapter to a Fixed
Location
The Serial-to-Bluetooth Adapter is design to be used on the desktop or to be panel-mounted. To attach
the bracket for panel-mounting, following these steps:
1. Typically, the adapter is mounted against a flat surface with two mounting screws. Drill the
mounting holes at the desired location. The mounting holes must be separated by 4 -15/16
inches center-to-center.
2. To attach the mounting bracket, slide it into the corresponding slot on the back of the
MultiConnect chassis.
3. Attach the adapter to the surface with two screws.

Chapter 2 – Installation and Cabling
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 10
Making the Connections
Directions for the MTS2BTA (Externally Powered)
Turn off your PC. Place the adapter in a convenient location. Connect it to your PC’s serial port
and plug in the power.
Directions for the MTS2BTA-R (Powered through Pin 6
of an RS-232 Cable)
Turn off your PC. Place the adapter in a convenient location. Then connect it to your PC’s serial
port. The MTS2BT-R draws its power from the RS-232 cable's Pin 6.

Chapter 2 – Installation and Cabling
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 11
Optional – Direct DC Power Connection for Use with
the MTS2BTA
•Connect a fused DC power cable into the
power connector on the MultiModem.
•Then attach the two wires at the other end of
the fused cable to a DC fuse/terminal block on
a vehicle in which you are mounting the
MultiModem.
•Connect the red wire to the "+" positive and
the black wire to the "–" negative. Be sure the
GND connection is correct.
Note: For automotive application: according to
the type of application, you can use
permanent “+” or key-switched “+”.
Connect the power supply to its source
(for example, in a mobile situation, to the
vehicle’s DC fuse/terminal block).
Warning: Over-voltage protection is
provided on the device. To ensure
complete protection, you may want to
add additional filtering to the DC input.

Chapter 3 – AT Commands and Configuration Examples
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 12
Chapter 3 – AT Commands and
Configuration Examples
AT Command Reference Guide
AT commands for the Serial-to-Bluetooth Adapter are published in a separate Reference Guide included
on the product CD and posted on the Multi-Tech Web site.
Using AT Commands
Default Settings / Changing Configuration
Parameters, such as the Bluetooth Name, Service Name, Class of Device and Serial Port settings
can be viewed and configured. This can be done locally through the serial port UART or from a
remote Bluetooth RF link. To configure the MultiConnect Bluetooth Adapter, the device must be in
command mode by issuing +++. While in command mode, the adapter will accept ASCII bytes as
commands.
The communications settings should match the settings used when the adapter connects. For
example, the defaults are:
9600bps
8 bits
No Parity
1 stop bit
Hardware flow control enabled.
If you change these parameters, you have the option to store them permanently in the non-
volatile memory.
Run your favorite terminal emulator, HyperTerminal, or other program.
•Type AT on your screen and follow it with a carriage return <cr>. You should see "OK"
returned to you. This will verify that your cable and communications settings are correct.
When the adapter is not connected to another Bluetooth device, you can type the AT
commands directly into the UART; e.g., you do not have to type +++ to change from data
mode to command mode.
•Now you can enter any of the AT commands discussed in the following sections. Follow
these commands by <cr>. Valid commands will return an "OK"or a valid response. Invalid
commands will reply ERROR.
•To return to data mode, type ATMD. You can now pass or receive data from a remote
connected Bluetooth device.
Notes:
•If you change communications parameter settings, remember to change your terminal or
emulator communications settings to correspond to the newly created parameter settings.
•AT commands will not echo back to the terminal.

Chapter 3 – AT Commands and Configuration Examples
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 13
Setting Parameters
This section covers how to send AT commands at the PC connected to a Bluetooth Adapter to
query and set parameters for Bluetooth communication.
Example of a Master Discovery/Connection Sequence
From Power Up and No Connection
1. Verify local device is Master in Data Mode.
Sent: ATSi,7 <cr>
Reply: <cr_lf>1,1,0,0<cr_lf>
2. If not Master, set to Master and Data Mode.
Sent: ATSW25,1,1,0,0 <cr>
Reply: <cr_lf>OK<cr_lf>
3. Perform an Inquiry to obtain BT_Addresses (unless it is already known).
Sent: ATUCL // Clears radio state
Reply:<cr_lf>OK<cr_lf>
Sent: ATDI,1,00000000 {Class of Device}<cr> // Looks for only one Bluetooth device
Reply: <cr_lf>00A0961F2023,00000104,MTS2BTA<cr_lf>DONE<cr_lf>
CONNECT <cr_lf>
4. Perform a Master Connect over SPP using the BT_Address.
Sent: ATDM, 00A0961F2023,1101<cr> // SPP connection
Reply: <cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address radios is
in data mode
5. Place radio into Fast Data Mode.
Sent: +++<cr> // Places Radio in Command Mode
Reply: <cr_lf>OK<cr_lf>
Sent: ATMF<cr> // Places radio in Fast Data Mode
Reply: <cr_lf>OK<cr_lf>
6. Send Data.
Note: Sending Commands from the Slave When the Slave Connects in Fast Data Mode
(ATSW25/or issuing ATMF)
All valid AT commands sent through the Slave's UART will be interpreted and responded
by the Master as if it were the local Slave radio. Basically, in this configuration from the
Slave end, you can obtain status and configure the remote Master radio. This is a unique
feature that may be useful in some applications, but it can be confusing if you think you are
talking to the Slave.
To Get Out of Data Mode and Check Status
1. Delay at least 50 milliseconds; this could be less or more.
2. Perform a Set Command Mode.
Sent: +++<cr>
Reply: <cr_lf>OK<cr_lf>
3. Delay at least 50 milliseconds.
4. Check Status, perform a Disconnect …
Sent: AT<cr>
Reply: <cr_lf>OK<cr_lf>
Note about Being Connected in Fast Data Mode
If connected in Fast Data Mode, it is necessary to reset the master or slave to break the
connection.

Chapter 3 – AT Commands and Configuration Examples
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 14
Example of a Slave Command Sequence
From Power Up:
1. Check and verify Communication to Slave.
Sent: AT<cr>
Reply: <cr_lf>OK<cr_lf>
2. Get information on Slave Bluetooth address.
Sent: ATSI,1<cr>
Reply: 12-digit address
<cr_lf>OK<cr_lf>
3. Set Slave to automatically connect in Fast Data Mode and SPP on Bluetooth connection.
Sent : ATSW25,0,0,0,0 <cr>
Reply:<cr_lf>OK<cr_lf>
4. Either cycle power or send ATURST.
Note: This command sequence assumes the radio is set to factory defaults that allow it to
automatically come up and be ready to connect as a Slave from a Master request.

Chapter 3 – AT Commands and Configuration Examples
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 15
Test Procedures Using AT Commands
The following testing procedures can be used with the MTS2BTA and the MTS2BTA-R.
1. Connect serial cable from computer to DB9 connector of each MTS2BTA, then attach antenna
and power. Do this for both master and slave Bluetooth adapters.
2. Use terminal emulator like HyperTerminal or ZOC to communicate to Bluetooth socket modem
using AT command set. Set baud rate to 9600bps. If MTS2BTA has label with different baud
rate then set emulator to match with this baud rate.
3. If necessary, can retrieve address from Bluetooth module being tested.
Sent: ATSI,1<cr>
Reply: OK<cr_lf>
Reply: <cr_lf>12-digit address <cr_lf>OK<cr_lf>
4. Issue these AT commands at slave Bluetooth device to prepare for wireless connection and
transfer data between modules.
•How to set to Slave and Fast Data Mode.
Sent: ATSW25,0,0,0,0 <cr>
Reply: OK<cr_lf>
•How to set to DUN or SPP on channel 0.
Sent: ATSSNC,0,com0,1101 (for SPP)<cr> or
ATSSNC,0,com0,1103 (for DUN)<cr>
Reply: OK<cr_lf>
•Reset slave Bluetooth device.
Sent: ATURST <cr> // Resets radio, wait 5 seconds
Reply: OK<cr_lf>
5. Issue these AT commands at master Bluetooth device to generate a wireless connection and
transfer data between modules.
•How to set to Master and Fast Data Mode.
Sent: ATSW25,1,0,0,0 <cr>
Reply: OK<cr_lf>
•How to set to DUN or SPP on channel 0.
Sent: ATSSNC,0,com0,1101 (for SPP)<cr> or
ATSSNC,0,com0,1103 (for DUN)<cr>
Reply: OK<cr_lf>
•Perform an Inquiry to detect BT_Address (unless already known) of slave Bluetooth device.
Sent: ATURST <cr> // Resets radio, wait 5 seconds
Reply: OK<cr_lf>
Sent: ATDI,1,00000000 {Class of Device} <cr> // Looks for only one Bluetooth device
Reply: OK<cr_lf> // Search completed when DONE appears
Reply: <cr_lf>00A0961F2023,00000104,MTS2BTA<cr_lf>
Reply: <cr_lf>DONE<cr_lf>
•Perform a Master Connect over SPP using the BT_Address.
Sent: ATDM, 00A0961F2023,1101<cr> // SPP connection
Reply: OK<cr_lf>
Reply:<cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address; in data mode
•Or perform a Master Connect over DUN using the BT_Address.
Sent: ATDM, 00A0961F2023,1103<cr> // DUN connection
Reply: OK<cr_lf>
Reply:<cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address; in data mode
•Send and receive Data by transferring file or holding down key on keyboard.

Chapter 3 – AT Commands and Configuration Examples
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 16
Disabling Flow Control Using AT Commands
Protocol Change:
For Bluetooth protocol V2.0, the circuit board I/O pin 7 now controls flow control.
Previous Protocol V1.2 New Protocol V2.0
ATSW22,3,x,x ATSW22,7,x,x
ATSW23,3,x,x ATSW23,7,x,x
Disabling Flow Control Using Protocol V.2.0:
Using a terminal screen with flow control enabled, issue commands to turn off flow control.
Sent : ATSW22,7,1,0 <cr> // Set PIO7 as output and do not store in flash
Reply: OK<cr_lf>
Sent : ATSW23,7,1,0<cr> // Set PIO7 output high and do not store in flash
Reply: OK<cr_lf>
To store the setting in flash:
Sent : ATSW22,7,1,1 <cr> // Set PIO7 as output and store in flash
Reply: OK<cr_lf>
Sent : ATSW23,7,1,1<cr> // Set PIO7 output high and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth device with flow control turned off.
Configuring to Use DTR for Resetting the MTS2BTA
Using AT Commands
Using a terminal screen, issue commands so when DTR goes off the adapter is reset.
Sent : ATSW22,6,1,0 <cr> // Set PIO6 as output and do not store in flash
Reply: OK<cr_lf>
Sent : ATSW23,6,0,0<cr> // Set PIO6 output low and do not store in flash
Reply: OK<cr_lf>
To store the setting in flash:
Sent : ATSW22,6,1,1 <cr> // Set PIO6 as output and store in flash
Reply: OK<cr_lf>
Sent : ATSW23,6,0,1<cr> // Set PIO6 output low and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth device. When the serial connection is terminated (DTR
goes off), the Bluetooth adapter will reset.
Other Examples
See the Bluetooth AT Commands Reference Guide for other examples:
•Multipoint Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA –
One Slave and Four Master Devices.
•Multipoint Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA –
One Master and Four Slave Devices.
•Repeater Example Using the SocketWireless MTS2BTSMI or the Bluetooth Adapter MT2BTA.

Chapter 4 – Peripheral Devices
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 17
Chapter 4 – Peripheral Devices
Antenna System
Antenna Requirements
Frequency Range 2.4-2.5 GHz
Impedance 50 ohm nominal
VSWR <2.0:1
Gain 2 dBi
Radiation Omni
Polarization Vertical
Wave Dipole ½ Wave
Connector Reverse Polarity SMA Plug
Bluetooth Antenna Available from Multi-Tech:
Part Number Description
ANBT-1HRA Hinged Right Angle 2.5 GHz ½ Wave Reverse Polarity Antenna
Bluetooth antennas also can be ordered from the following manufacturers. For the
manufacturers listed without specific part numbers, be sure to select the antenna that
meets the requirements listed above.
http://nearson.com (part number S131AH-2450S)
http://www.ead-ltd.com
http://www.centurion.com
http://www.mobilemark.com
http://woken.com
Antenna Cable
An optional 6” antenna cable (SMA Jack to MMCX Plug) can be ordered from Multi-Tech
Systems, Inc.
Part Number Description
CARSMA-MMCX-1 Reverse SMA to MMCS COAX 6 inch cable (Single Pack)
MMCX Plug
SMA Jack
Antenna Cable – SMA Jack to MMCX Plug
Approved Antenna Cable Parts
GC Protronics 20930C
Samtec ASP-116785-01
Coax Cable RG-178/U

Chapter 4 – Peripheral Devices
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 18
Pin Assignments for the Serial Port
Female End of the Multi-Tech Adapter
The following tables explain the Multi-Tech Adapter pin functions.
External Power Powered
Through Pin 6
Signal IN/OUT Signal IN/OUT
Pin 1 CD O Pin 1 CD O
Pin 2 TX O Pin 2 TX O
Pin 3 RX I Pin 3 RX I
Pin 4 DTR I Pin 4 DTR I
Pin 5 GND -- Pin 5 GND --
Pin 6 DSR O Pin 6* Power
Pin 7 CTS I Pin 7 CTS I
Pin 8 RTS O Pin 8 RTS O
Pin 9 RI O
Multi-Tech
Adapter
Female Connector
Pin 9 RI O
Warning:
When supplying power to the RS-232 connector of the adapter,
make sure the power does not feed the DTE device.

Appendix A – Regulatory Compliance Statements
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 19
Appendix A – Regulatory Compliance
Statements
Waste Electrical and Electronic Equipment
Statement
Note to OEMs: The statement is included for your information and may be used in
the documentation of your final product applications.
WEEE Directive
The WEEE directive places an obligation on EU-based manufacturers, distributors, retailers, and
importers to take-back electronics products at the end of their useful life. A sister Directive, ROHS
(Restriction of Hazardous Substances) complements the WEEE Directive by banning the
presence of specific hazardous substances in the products at the design phase. The WEEE
Directive covers all Multi-Tech products imported into the EU as of August 13, 2005. EU-based
manufacturers, distributors, retailers and importers are obliged to finance the costs of recovery
from municipal collection points, reuse, and recycling of specified percentages per the WEEE
requirements.
Instructions for Disposal of WEEE by Users in the European Union
The symbol shown below is on the product or on its packaging, which indicates that this product
must not be disposed of with other waste. Instead, it is the user’s responsibility to dispose of their
waste equipment by handing it over to a designated collection point for the recycling of waste
electrical and electronic equipment. The separate collection and recycling of your waste
equipment at the time of disposal will help to conserve natural resources and ensure that it is
recycled in a manner that protects human health and the environment. For more information
about where you can drop off your waste equipment for recycling, please contact your local city
office, your household waste disposal service or where you purchased the product.
July, 2005

Appendix A – Regulatory Compliance Statements
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370B) 20
Information on HS/TS Substances According to
Chinese Standards
In accordance with China’s Administrative Measures on the Control of Pollution Caused by Electronic
Information Products (EIP) # 39, also known as China RoHS, the following information is provided
regarding the names and concentration levels of Toxic Substances (TS) or Hazardous Substances (HS)
which may be contained in Multi-Tech Systems Inc. products relative to the EIP standards set by China’s
Ministry of Information Industry (MII).
Hazardous/Toxic Substance/Elements
Name of the
Component Lead
(PB) Mercury (Hg) Cadmiu m (CD) Hexavalent Chromium
(CR6+)
Polybrominate
d Biphenyl
(PBB)
Polybrominate
d Diphenyl
Ether (PBDE)
Printed Circuit
Boards O O O O O O
Resistors X O O O O O
Capacitors X O O O O O
Ferrite Beads O O O O O O
Relays/Opticals O O O O+ O O
ICs O O O O O O
Diodes/ Transistors O O O O O O
Oscillators and
Crystals X O O O O O
Regulator O O O O O O
Voltage Sensor O O O O O O
Transformer O O O O O O
Speaker O O O O O O
Connectors O O O O O O
LEDs O O O O O O
Screws, Nuts, and
other Hardware X O O O O O
AC-DC Power
Supplies O O O O O O
Software /
Documentation CDs O O O O O O
Booklets and
Paperwork O O O O O O
Chassis O O O O O O
XRepresents that the concentration of such hazardous/toxic substance in all the units of
homogeneous material of such component is higher than the SJ/Txxx-2006 Requirements for
Concentration Limits.
ORepresents that no such substances are used or that the concentration is within the
aforementioned limits.