Writing to Characteristics based on UUID

[danbujak]

I have a central device that connects to a peripheral, which will have a custom service, with characteristics A through F that I want to write to each time on connection. I know the custom UUIDs for these charactersitics. What's the best way to handle this?

Should I do writes during discovery? Or should I wait till service discovery is complete and then look for the UUIDs in the list of services?

[Hung Bui]

@danbujak: You should use the ble_db_discovery module. The module will do service discovery and notify you if the 128 bit UUID service is found. We have an example of using that for our 128 bit UUID here.

[Hung Bui]

@danbujak: There won't be a stored database from the ble_db_discovery library, instead in your application you would need to save the handles of those characteristics when you receive the BLE_DB_DISCOVERY_COMPLETE event in the db_discover_evt_handler() you registered when you call ble_db_discovery_evt_register().