Subscribing to multiple notifications not working

RE: Subscribing to multiple notifications not working

bluetoothmdw — Tue, 03 Feb 2026 15:49:53 GMT

Hi Vidar, I'm going to persist looking at this for a while longer before I burden you. I don't like the look of

if (!bt_uuid_cmp(discover_params.uuid, BT_UUID_HRS))

discover_params contains the parameters to be used when initiating discovery, I think as opposed to the properties of the attribute just discovered which is the attr struct in the parameters to the callback function. So this looks incorrect to me. I'll explore this when I have a bit more time.

All the best

RE: Subscribing to multiple notifications not working

Vidar Berg — Tue, 03 Feb 2026 12:32:05 GMT

Thank you for the update. Looking at the description again I think I may have misread the sniffer capture. With the battery characteristic declaration at handle 0x12 it seems correct to have the CCC handle at 0x16 (22). Please let me know if you are still experiencing the issue. If so, I will try to reproduce it here.

RE: Subscribing to multiple notifications not working

bluetoothmdw — Tue, 03 Feb 2026 07:50:52 GMT

Hi Vidar, thanks for your reply. I see what you mean about the handle value. And (great idea), the Bluetooth Low Energy app confirms that my code is not selecting the right handle for the Battery Level CCC.

It must be a bug in my code then. I'll keep staring at it until I can see the problem :-)

RE: Subscribing to multiple notifications not working

Vidar Berg — Mon, 02 Feb 2026 14:44:01 GMT

Hello,

The attribute handle for BAS in the log (22) does not seem to match what is shown in the sniffer capture (0x12), but I I'm not immediately able to spot anything wrong from the code snippets you posted. As a test, could you please try connecting to this peripheral from the Bluetooth Low energy app in nRF connect for desktop and check the log which attribute handle is being used when enabling notifications on this characteristic?

Best regards,

Vidar