Greetings!
I am using Wireshark along with an nRF52840 dongle to monitor BLE traffic between a mobile app and connected peripheral and periodically I see some "L2CAP Fragment" packets that don't appear to correlate to any (obvious) BLE transmissions my app is trying to send. I know this because I use Xcode's PacketLogger in parallel and there is nothing being sent (from Packet Logger's perspective) at the time these L2CAP fragments show up in Wireshark.
By periodically, I mean every few seconds to every few minutes. One or two here and there.
These fragment packets don't seem to break anything but it would be insightful to know what might be causing them. I always like to minimize noise whenever possible.
Attached is an illustration of one random L2CAP Fragment packet that just showed up in the middle of nowhere many seconds removed from any other packet either before or after (not counting Empty PDUs). The central and peripheral addresses shown are legitimate.
Any thoughts on what could be causing these?
