RE: Characteristic values swapped on iOS

snoopy20 — Thu, 05 Mar 2026 12:13:43 GMT

Hi Simon,

I can't replicate it unfortunately, it's not occurring often and the users in production aren't tech savvy.

I'm aware of the service change indications but I'm not changing the services they're configured before softdevice is enabled. Even if iOS was using a previous cache (not sure why it would) the cache would match that after the peripheral had reset and reconnected.

Anyhow just a quick check I'm mostly confident the issue isn't on peripheral side.

RE: Characteristic values swapped on iOS

Simonr — Thu, 05 Mar 2026 12:01:49 GMT

Hi Andrew

With the SoftDevice v6.1.0 being very mature at this point (released 7 years ago), I doubt an issue like this would go under the radar for that long, and I can't find or recall any reports like this in the past.

I was going to recommend using the Service Changed indications, but since you are working on the nRF52810 I assume you're not using the S132 or S140 SoftDevices. I'm not sure, but does iOS maybe have something equivalent?

If you have an nRF52 DK/Dongle available, you can use the nRF Sniffer with Wireshark to get information on what's going on over-the-air that might point you in the right direction.

Best regards,

Simon