SWRU581 March 2021 CC2564C , CC2564MODA , CC2564MODN , WL1831

10 The BluetopiaPM Server – Pairing Mode

SS1BTPM is compiled to support secure simple pairing as the default configuration. If legacy pairing is needed instead, for example so that the user is forced to enter a fixed pin code, then it is possible to configure and recompile SS1BTPM to only support legacy pairing. To do this open <INSTALLATION_DIR>/BluetopiaPM/ss1btpm/server/BTPMSRVR.c in a text editor. Near the bottom of the file modify the assignment:

DefaultInitializationData.DefaultPairabilityModeSSP = TRUE;

and change TRUE to FALSE.

DefaultInitializationData.DefaultPairabilityModeSSP = FALSE;

After making this change next rebuild SS1BTPM.

SS1BTPM is now compiled to support only legacy pairing. You will notice that the next time a device pairs with the target that the demo application will prompt the user for a pin code response. When this occurs respond with the PINCodeResponse command, for example PINCodeResponse 0000. The pin code used, 0000 in this example, must be the same on both devices.

Note: Keep in mind that Legacy Pairing is generally not as secure as Secure Simple Pairing. If security is a concern for your application then legacy pairing is not recommended. For more details on the security of Bluetooth pairing modes refer to the core specification that can be found on the Bluetooth SIG's website. Also note that, in the default configuration where secure simple pairing is enabled, legacy pairing is still supported. If a remote device attempts to connect to the target and the remote device only supports legacy pairing, the target will fall back to legacy pairing.