SystemBase BT-232 User Manual

RF/Serial(RS232) Converter

BT-232

User Manual

Version 1.1

(Software version 2.1)

1. Introduction

BT-232 converts RS-232 serial signals to Bluetooth RF signals.

■ Product box contains

- RS232 to RF Converter 2EA - User Manual

- A/C power supply(110/220V AC to DC) - USB cable

2. Specifications

Model Name BT-232 (Software version 2.1)
Type RS232 to RF Conveter
Distance 100 M
Voltage 5V ~ 12V/DC
Wireless interface Bluetooth Specification Version 1.1
Frequency bandwidth 2402 ~ 2480 MHz
Radio mode Frequency hopping
Channels 7
Modulation GFSK
Current Max 200 mA (5V DC)
Temperature -20 ~ 70 °C
Antenna Internal Chip Antenna
Antenna gain Max 1.5 dBi
Antenna directivity Non-directional
Antenna polarization
characteristics

None

Serial
communication

1200 BPS – 115200 BPS Full Duplex
8 Data bits/Odd, Even, No Parity/1,2 Stop bits

Flow Control RTS/CTS ON/Off possible,

DTR/DSR/DCD Loop back connected

3. Architecture

1) External View

2) Mode Switch
Setup Active : Active Mode
Setup Active : Setup Mode

3) LED

- LINK : Turns green when remotely linked with the other party

- TxD : Turns on when data is transmitting (turns on faintly only if
linked)

- RxD : Turns on when data is receiving

4) Connector

DB-9 Connector Pin-out

4. Installation Procedures

1) Connection
There is no need to install additional programs in your computer or
communication devices to use the BT-232.
Connect the BT-232 to a serial port at your computer or
communication device and supply it with power. Then you can easily
access it as if you were using the existing serial port.
BT-232 can be powered by the following methods: DC power supply,
PC USB port through USB cable or DB9 pin connector (available only if
special serial ports are used).
A Bluetooth connection between two devices using the BT-232 is
automatically established when both BT-232 are powered on. After
that, you are free to use the serial port.

2) Environment Setting
Since BT-232s are connected onto the serial port of your PC or
communication device, you should specify the serial por t enviro nment
information (Baud rate, data bits, parity bit, stop bit, flow control, etc.)
and the RF connection (device name, operating mode, target addr ess,
etc.) for mutual communication.
RF connection setting is required only if you communicate with other
manufacturer’s Bluetooth devices instead of the BT-232 or change the
initial setting.
For environment setting, please use “Hyper terminal” included in your
Windows’ operating system.

5. Operating Environment Setting

1) Procedures
BT-232 can set baud rate, parity, stop bit, device name, target
adapter and operating mode using Hyper Terminal.
①. Connect one BT-232 to the PC serial port and power it on.
②. Run Windows’ Hyper Terminal program.
③. Set baud rate, data bits, parity and stop bit to

9600-8-NONE-1 at Hyper Terminal.

④. Select setup mode at the BT-232 mode switch.

⑤. If you press <Enter>key after 5 seconds, software version
information will be displayed.

⑥. Set up serial port.
⑦. Setup RF connection.
⑧. After completing the setting, be sure to execute ‘X’ command and
save, and then the Mode Switch to ‘Active’.

■ Reference:
If you enter ‘?’, the list for all commands is displayed, and if
‘?<command>’, how to use the requested command is displayed. All
commands should be typed with capital letter. All commands and
setting values are case-sensitive.

2) Serial settings

■ Example of Baud Rate setting (9600 bps -> 19200 bps)
①.

First, enter ‘?B’ to display the way to use the requested command.

To set the baud rate at 19200bps, the input value shall be ‘4.’ (Refer to
the above figure)
②. Type ‘B’.

③. Type ‘4’.

④. The set value is shown on the screen again. (All the same in the
next procedures)

■ Example of Flow control setting (None -> Hardware)
①. First, enter ‘?F’ to display the way to use the requested command.
To set the flow control at Hardware, the input value shall be ‘1’.
② Type ‘F ’.

③. Type ‘1’.

■ Example of Stop bit setting (1 bit -> 2 bits)
①. First, enter ‘?S’ to display the way to use the requested command.
To set the stop bit at 2bit, the input value shall be ‘1’.
② Type ‘S’.

③. Type ‘1’.

■ Example of Parity bit setting (None -> Even)
①. First, enter ‘?P’ to display the way to use the requested command.
To set the parity bit at Even, the input value shall be ‘2’.
② Type ‘P’.

③. Type ‘2’.

3) RF Connection setting

This is necessary only if you communicate with other manufactur er’s
Bluetooth devices instead of the BT-232 or change the initia l settings.

■ Example of Target Address setting
(00:02:78:01:EF:BB -> 00:02:78:01:EF:BC)
①. Type ‘A’.

②. Type the target address to be changed. You have to enter the 12­digit hexadecimal address. After typing “00027801EFBC”, press ‘Enter’
key.

■ Example of connection mode setting (1:1 -> Wait)

Software version

Authentication

Adapter address

Factory default setting

Target adapter address

Device name

COM port setting

①. First, enter ‘?M’ to display the way to use the requested command.
To set the connection mode at Wait mode, the input value shall be ‘1.
② Type ‘M’.

③. Type ‘1’.

■ Example of device name setting
①. Type ‘N’.

②. Enter the desire device name and press ‘Enter’ key (however, up to
11 alphanumeric characters possible).

■ Example of setting PIN
①. Type ‘E’.

② Enter the desire PIN value and press ‘Enter’ key. (however, up to 11
alphanumeric characters possible)

■ Example of setting low power mode
①. Enter ‘K.’ If you want to set up a low power mode, enter ‘E’, or if
not, enter ‘D’.

■ Example of setting inquiry scan
①. Enter ‘J.’ If you want to activate the search response for an adapter,
enter ‘E’, or if not, enter ‘D’.

■ Display Device Information
①. Type ‘V’.

②. All current information is displayed. At this time, verify that the
values are identical to the ones you have once set.

■ BT-232 Pair Setting
BT-232 always perform 1:1 communication in pairs.
The following example shown how to set up the destination BT-232
address.
①. Set baud rate, data bits, parity and stop bit to 9600-8-NONE -1 at
Hyper Terminal.
②. Connect one of BT-232s to your PC serial port and put ‘Mode
Switch’ to Setup Mode. and Record displayed BD_ADDR.

③. Remove BT-232(Used at s tage ②) from your PC serial port, and
connect the target BT-232 and then set the registered BD_ADDR using
‘A’ command.

④. Save the setting using ‘X’ command and then put the ‘Mode
Switch’ to ‘Active’.
⑥. Apply stage ②~④ procedures to the target BT-232, and set the
opposite BD_ADDR of two BT-232 devices to TARGET_ADDR.
Appendix-A : Wait for user command mode
The Wait mode that waits for a command by a user performs search
and connection of accessories. The correspondent adapter shall be set
up in Wait mode.

■ Search
It searches Bluetooth devices connected and serviced in the same
coverage.

After execution of the command, the adapter address searched is
displayed

■ Connect
Connection to a specific device

After execution of the command, the Setup mode is ended and the
communication state is ready.
Appendix–B: Command

Items Commands Descriptions Remarks

1. Connection
Setting

A(addr) Setting for the address of

device to be connected
addr: 12 numbers in Hex

Effective in connection
mode 0 and 2.

2. Baud Rate
Setting

B(BR[D]) Setting for baud rate.

BR(Baudrate): 0 ~ 7
D: Factory default setting

0: 1200, 1: 2400
2: 4800, 3: 9600
4: 19200, 5: 38400
6: 57600, 7: 115200

3. COM Port
Assignment

C(COM port) Assigning the priority of a

COM port requested for the
connection.
COM port: 1 ~ 7

Effective in connection
mode 2.

4. PIN
Number
Setting

E(PIN

/Enter)

Setting for authentication /
ciphering.
PIN: 11 letters (max)
Enter: deactivated

After authentication and
ciphering, two adapters
are to be connected if
their PIN numbers are
the same.

5. Flow
Control
Setting

F(FC[D])

Setting for flow control

FC: 0 ~ 2
D: Factory default setting

0: None
1: Hardware
2: DTR/DSR

6. Search
Timeout
Setting

G(TO)

Setting for search timeout

TO(timeout): 0 ~ 999

Effective in connection
mode 3.
Default: 10 seconds

7. Maximum
Search
Setting

H(NO)

Setting for the maximum

number of devices to be
searched
NO(Respondents): 0 ~ 999

Effective in connection
mode 3.
Default: 10

8. Search
Execution

I(TO,NO) Search for Bluetooth devices

connected
TO(timeout): 0 ~ 999
NO(correspondents): 0 ~ 999

Effective in connection
mode 3.
Search will be
completed when it
reaches either timeout
or the maximum number
of correspondents.

9. Search
Response
Setting

J(E/D)

Setting whether to respond to

search request
E: Enabled
D: Disenabled

Effective in connection
mode 1.

10. Power
save setting

K(E/D) Setting for power save mode

E: Enabled
D: Disenabled

11.
Connection
Mode Setting

M(mode)

Setting for connection mode

The default setting for BT-232
is connection mode 0, and
connection modes 1,2,3 are
used for the connection with
other Bluetooth devices.
Mode: 0 ~ 3

0: 1:1 connection
1: connection waiting
2: automatic connection
after registration
3: wait for user
command

12. Name
Setting

N(name) Setting for friendly name.

Name: 11 letters (max.)

Along with the address,
it is available for ID.

13. Parity Bit
Setting

P(PA[D]) Setting for parity bit.

PA: 0 ~ 2
D: Factory default setting

0: None
1: Odd
2: Even

14.
Connection
Timeout
Setting

Q(TO)

Setting for timeout

connection.
TO(timeout): 0 ~ 999

Effective in connection
mode 3

15. Stop Bit
Setting

S(ST[D]) Setting for stop bit.

ST: 0 ~ 1
D: Factory default setting

0: 1 Stop
1: 2 Stop

16.
Connection
Execution

T(addr[,TO])

Connection to a specific

device.
addr: 12 numbers in Hex
[TO](timeout): 0 ~ 999

Effective in connection
mode 3

17. Execution
Cancellation

U Cancellation of device search

and connection command.

Effective in connection
mode 3

18. Setting
Confirmation

V Displays current setting. Software version

information included

19. CoD
Setting

W(CoD)

Setting for class of device.

CoD: 6 numbers in Hex

Default: “001F00”
Critical factor for search

20. Setting
Change Save

X Applies edited settings. After command, BT-232

shall be rebooted.

21. Status
Display

Z Displays the status of BT-232. S: Idle P: Pairing

C: Connecting
A: RF on
I: Inquiring

22. Help ?([command]) Displays command list and
help.

※ User should change hyper terminal setting value as like Baud rate,
Parity bit, Stop bit to assigned factory def ault value in the Set-up mode,
If user has changed factory default’s setting value.

Record BD_ADDR.

Enter BD_ADDR.

① Input ‘I’ command

② cf) Input ”10,10”

Device address found

Search completed

① Input ‘T’

② Input ”000278012FC2 ”