nRF Connect Desktop not showing BLE Notification but nRF Android does

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Wed, 26 Feb 2020 07:32:39 GMT

Ok good. So are you still encountering the problem where the FW seemingly gets into a bad state after having been connected to a non-Android device?

[quote user="yayis"][/quote]

PR -> PC -> Android = Not OK

PR -> iOS -> Android = Not OK

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Chab — Tue, 25 Feb 2020 15:16:59 GMT

Yes this follow the same issue from Yayis, we are working on the same project and I have access to the debug the FW.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Tue, 25 Feb 2020 14:18:04 GMT

Hi,

Is this a follow up to the same issue yayis reported here, and do you have access to debug the FW?

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Chab — Tue, 25 Feb 2020 10:32:15 GMT

Hi !

On the FW side, the Device recieve anything, until you disconnect the host dongle to the device OR you close the windows application.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Chab — Tue, 25 Feb 2020 10:29:57 GMT

Hi !

On the FW side, the Device recieve anything, until you disconnect the host dongle to the device OR you close the windows application.

But it is possible to change characteristics of the device, like enable notifications.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Tue, 07 Jan 2020 20:43:49 GMT

I agree with you. It seems like the FW is getting into a bad state. It's also interesting to see that this bad state seems to be carried over to the next connection with the Android phone in the last two sequences. Had you tested this on different Android phones? Maybe it happens to work with one particular phone. Either way, I think this something you need to reach out to the FW developers to get help with.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

yayis — Tue, 07 Jan 2020 15:12:18 GMT

Yes, there are several commands and already tried them. They all work in Android.

Something else I am noticing, once I try the PC or iPhone version and then I try with the Android, I won't get anything. I would have to power restart the device. As if the PC/iOS is sending the device into some strange mode.

So, some sequences:

Power Restart -> Android = OK

PR -> Android -> Android = OK

PR -> Android -> PC = Not OK

PR -> PC = Not OK

PR -> iOS = Not OK

PR -> PC -> Android = Not OK

PR -> iOS -> Android = Not OK

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Tue, 07 Jan 2020 15:05:00 GMT

Ok, it sounds like it might be something else that causes this discrepancy, and not that the write data is different. But I can't think of any explanations as to why it may work on Android, but not with the iPhone and PC app.

The command and response look to be some kind of TLV format so I assume there are more commands available. Do any of the other commands work?

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

yayis — Tue, 07 Jan 2020 14:48:56 GMT

I did select "Byte Array" for iOS, I also choose this option in Android.

I also tested with a cloned device on the phone and I see that notifications are shown in PC app. I just can't understand why it does not happen for the actual device. Are you aware of Android being any different?

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Tue, 07 Jan 2020 14:44:17 GMT

Hi,

So iOS has more options for sending the notification, at least for me here. Did you select the sends as 'byte array' option? I tried this with nRF connect ios v 2.1.1 and verified that I received the same data in the same order as I did when I used the PC app.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

yayis — Tue, 07 Jan 2020 14:23:55 GMT

Hi Vidar,

Thanks. I actually don't have the source and I am not able to debug. I did try your suggestion and reversed the bytes as little endian, but still no response. I also noticed the iOS version of the app does not show me the notifications.

RE: nRF Connect Desktop not showing BLE Notification but nRF Android does

Vidar Berg — Tue, 07 Jan 2020 13:24:25 GMT

Hi,

Please try to debug the FW running on the nRF device and see if there is any difference in the data received from the PC and the Android phone. Maybe the byte order is different? I wasn't able to replicate this here, but that may be because the nRF connect app on Android was only letting me send text strings for some reason.