* Bluetooth and the Bluetooth logos are trademarks owned by Bluetooth SIG, Inc., U.S.A. and licensed to LinTech
GmbH, Berlin Germany.
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In the previous sections of this handbook, it was described how the adapter operates in standard mode as a
Slave with all Bluetooth partner devices that support the serial port profile and how the Bluetooth Adapter can be
configured to automatically set up a connection to other Bluetooth equipment, in the so called Master mode.
The condition in all cases for operation Master mode was that the partner device is known.
However, now there is a special function available, with which the Bluetooth RS232 Mini Adapter can also
perform an active device search for other Bluetooth devices and to set up a connection to these.
The advantage of this special function is that it is controlled by use of AT commands ( in a manner similar to
modem control ). This means that, unlike other standard available Bluetooth adapters, the LinTech Bluetooth
RS232 Mini Adapter can be operated using equipment/PCs that run with a different operating system to Windows.
For instance, the LinTech RS232 Mini Adapter is able to initiate a device search, perform a coupling procedure
and connect to the device thus located.
All that you require on your PC or other equipment, to which the RS232 Mini Adapter is connected, is a terminal
programme ( e.g. Hyperterminal ), with the aid of which you can control the device search and connection setup,
using AT commands.
This special function must first be activated in Slave – Configuration mode either via the AT command
interpreter or using the BlueTool (AT+MCON=1).
To do this, the RS232 Mini Adapter must be in Master mode ( see section 4.4: Changing between Master and
Slave operating modes).
The RS232 Mini Adapter must be connected to the physical serial interface of a PC and the terminal programme
must be opened via its COM-Port. The connection parameters (baud rate, stop bit, etc. ...) correspond to the
settings in the RS232 Mini Adapter.
The available commands can be read out using the command <AT12>
For descriptions of the various AT commands, please sea the AT Command List in the separate document.
5.2 Using two RS232 Mini Adapters to replace a cable connection
If you have two RS232 Mini Adapters you can use them as a replacement for a cable connection.
5.2.1. Requirement
Configure your adapters as described in section 3 – 'Configuration'.
Please note that the PIN of your device and that of the external device must be the same. The PIN and that
of the external device for the Adapters must also be the same.
5.2.2 Coupling and setting up the connection
Both adapters must be switched off and disconnected from any device.
Press the key on the first adapter and plug the power supply into the corresponding socket of the adapter.
LED 2 should now light up red to indicate the adapter is now in cable replacement coupling mode. Now release
the key.
Repeat the procedure with the other adapter.
When the LEDs of both adapters have lit up in red, plug the two adapters together.
If you have two adapters with a plug or a socket, you will have to use a null modem cable.
