Changing BLE services at runtime in NCS

RE: Changing BLE services at runtime in NCS

Hieu — Tue, 10 Sep 2024 12:28:06 GMT

That's right. It means you shouldn't need a reboot.

RE: Changing BLE services at runtime in NCS

Adarsh — Tue, 10 Sep 2024 12:12:19 GMT

Does that mean we dont need a reboot ?

RE: Changing BLE services at runtime in NCS

Hieu — Tue, 10 Sep 2024 12:09:50 GMT

Hi Adarsh,

Note that it also allows being called after settings_load(), just not between ble_init() and settings_load().

Regards,

Hieu

RE: Changing BLE services at runtime in NCS

Adarsh — Tue, 10 Sep 2024 11:51:28 GMT

Hallo Hieu,

In the Zepyhr API, its mentioned that the register/unregister of services should happen before ble_init(). Does that mean ,we need a reboot for changing the services dynamically ?

Regards

Adarsh

RE: Changing BLE services at runtime in NCS

Hieu — Tue, 10 Sep 2024 11:41:37 GMT

Hi Adarsh,

Yes, you can use the API you found to dynamically change the BLE GATT table. You will also need to enable CONFIG_BT_GATT_DYNAMIC_DB.

For the peer device to be aware of a change without rediscovering the services, you will also need to support the Service Changed Characteristic (CONFIG_BT_GATT_SERVICE_CHANGED).

Please examine carefully what the normal behavior for the built-in service is when dynamic GATT is enabled. I think most of them will register themselves by default.

Regards,

Hieu