nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

Einar Thorsrud — Wed, 10 May 2023 10:20:45 GMT

Thanks for the info. From what I understand from our mobile app developer there is not much we can do about it, but at least they are aware of it now.

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

ken.oujingxue — Wed, 10 May 2023 09:23:26 GMT

Hi,
For the test video, the phone is Honor 7X.

And I tested two Samsung phones, which automatically re-searched Bluetooth when they turned on Bluetooth, and did not reproduce the issure.

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

Einar Thorsrud — Tue, 09 May 2023 13:02:20 GMT

Hi,

Thank you for the videos. Which exact phone are you using?

As mentioned I have not been able to reproduce this on my end, but I have forwarded it to our app developers so that they can have a look.

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

ken.oujingxue — Tue, 09 May 2023 11:35:41 GMT

The test video for the Apollo BLE
devzone.nordicsemi.com/.../VIDEO_5F00_20230509_5F00_193201333.mp4

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

ken.oujingxue — Tue, 09 May 2023 11:27:26 GMT

For the test video, the android version is 9, and the nRF Connect version is 4.26.0
devzone.nordicsemi.com/.../VIDEO_5F00_20230509_5F00_191242209.mp4

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

Einar Thorsrud — Tue, 09 May 2023 10:53:50 GMT

Hi,

I see. I did not have many Android phones to test with, but I was not able to reproduce this using nRF Connect on Android 9.

Can you elaborate on which nRF Connect version you are using, and which Android version? Also, in case I misunderstood something, perhaps you can share details or a video of how to reproduce?

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

ken.oujingxue — Tue, 09 May 2023 00:51:38 GMT

Thanks for your quick reply.

Only considering Android smartphones, nRF Connect APP.
For Apollo BLE platform, reopen the phone's BLE, and BLE reconnect is success.

And for nordic platform, I found the reconnect success only on Android version 13

RE: nRF Connect App reconnect the BLE fail, when reopen the BLE of the Phone

Einar Thorsrud — Mon, 08 May 2023 13:44:29 GMT

Hi,

Yes, that is how nRF Connect for mobile behaves on iOS. When Bluetooth is toggled off and on again, it will no longer show the device it was connected to before, and the device list will be empty, requiring a new scan.

(There are quite a few differences between nRF Connect for iOS and Android, and most of the functional differences are related to differences in the Bluetooth API's on iOS and Android, where the application has access to more information and operations on Android than on iOS).