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Figure 12: Requesting pin input from user to complete pairing
If the server is running Linux, we must interact directly with the
Bluetooth subsystem to enable the pairing procedure without demanding any user interaction on the server. To establish this we programmed
our application to rewrite the bluez configuration file and update it with
the pin code that was included on the RFID chip. When we start the
pairing, the server will use this pin as a part of the pairing procedure
without prompting for additional input.
4. At the client side of the connection, the previous step will initiate a
request for pairing notification. For the user this will seem like a normal
pairing procedure as we can see from figure 12, and the user is presented
with a pin request. To complete the pairing, the user must issue his or
her pin code, the same pin that was written to the RFID chip at an
earlier stage.
The pairing procedure is now complete and we can proceed by choosing
one of the service examples explained in the next section.
6.2
Service Examples
With this in place, we can describe some service examples. The following
sections will give a short overview of some of the more typical usage scenarios
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