How to save bonding data and reuse it at power-on

RE: How to save bonding data and reuse it at power-on

Hung Bui — Tue, 08 Dec 2015 14:30:08 GMT

Hi SumitS,

The ble_app_gls does use device_manager_peripheral.c and that use flash to store bond information. You can test by do bonding, disconnect, reset the board and connect again.

You can have a look at this example. It's simple example on how to use the pstorage.

RE: How to save bonding data and reuse it at power-on

SumitS — Tue, 08 Dec 2015 04:02:10 GMT

Thanks. I can use the device manager as it is. Currently i am using the sample ble_gls code. In that it is not storing the bond information. Is there any sample code or example which shows how to use the p_storage. Or what changes i need to make in the existing code.

RE: How to save bonding data and reuse it at power-on

Hung Bui — Mon, 07 Dec 2015 13:40:30 GMT

Hi SumitS,

Could you let me know why don't you want to store the bond information on the nRF51 flash ? instead of your external EEPROM ?

If you want to handle the data yourself, please have a look at the ble_app_template in nRF51 SDK v8.0 where we handle bonding without the device manager/peer manager. But in that example we don't store the data in flash though.

You should store p_sec_keyset, which is the keyset you provide when you call sd_ble_gap_sec_params_reply() in BLE_GAP_EVT_SEC_PARAMS_REQUEST.The p_sec_keyset will get the keys when the bonding process finished, BLE_GAP_EVT_AUTH_STATUS event. You should store the keys after you receive this event.

After your reboot, you should read the keys out from flash and feed the keys to sd_ble_gap_sec_info_reply() call when the previously bonded central re-connect and re-bond (BLE_GAP_EVT_SEC_INFO_REQUEST event).

RE: How to save bonding data and reuse it at power-on

SumitS — Sat, 05 Dec 2015 07:24:05 GMT

So do i need to replace the pstorage part by my EEPROM module or is the code doing all this by itself?

RE: How to save bonding data and reuse it at power-on

RK — Sat, 05 Dec 2015 05:24:36 GMT

Nordic has a whole device manager library which does exactly this, there's examples, they use the pstorage_manager to store bonding information and retrieve it again. You should start by checking out all these examples.