Android-BLE-library Cannot find characteristics of custom service

RE: Android-BLE-library Cannot find characteristics of custom service

kerek — Mon, 15 Jun 2020 13:11:58 GMT

We have removed the bond request (making only pairing process instead), but changing the critical code (removed from here due to containing private information) so it will be in this stage in the initialization method made the difference, thanks!

RE: Android-BLE-library Cannot find characteristics of custom service

Aleksander Nowakowski — Fri, 12 Jun 2020 11:52:16 GMT

void initialize() {
    createBond()
        .done(device -> Log.i(logTag, "bond successful"))
        .fail((device, status) -> Log.w(logTag,"bond failed: " + status))
        .enqueue();
        
    // Continue with initialization here
    // [...]
}

RE: Android-BLE-library Cannot find characteristics of custom service

Aleksander Nowakowski — Fri, 12 Jun 2020 11:50:17 GMT

Also, for the next time you could share the logs from LogCat. This would help us, but I believe the above solution will work for you.

RE: Android-BLE-library Cannot find characteristics of custom service

Aleksander Nowakowski — Fri, 12 Jun 2020 11:48:50 GMT

Hello,

My recommendation would be to move the bonding request to initialization, as a first request.

onDeviceConnected is fired before service discovery and attributes are not ready. Looks like when bonding is complete the lib is trying to proceed with initialization, but services are not ready/were invalidated. Bonding after service discovery should work.

RE: Android-BLE-library Cannot find characteristics of custom service

Einar Thorsrud — Thu, 11 Jun 2020 16:07:27 GMT

Hi,

I do not have any immediate explanation or suggestions, but I will try to get feedback from the Android-BLE-library developers and get back to you.