Potential issue in GATT processing using Windows LE explorer

[lulf]

Using Windows LE explorer is with trouble + esp32 is reported to hang. See esp-rs/esp-hal#1971 (comment) for a packet capture. Attempt to reproduce with other HCI controllers as well to see if it's esp-specific.

[timokroeger]

I see the same problem trouble running on a nrf52 device.
Any tool using the WinRT bluetooth API gets stuck when trying to discover services (that includes the Web Bluetooth API in Edge browser).

Here are the defmt logs of my device:

[host] filter accept list size: 8
[host] setting txq to 1, fragmenting at 255
[host] configuring host buffers (8 packets of size 255)
[host] initialized
[host] enabling advertising
[ble] advertising, interval: Duration { ticks: 656 }
[host] connection with handle ConnHandle(0) established to BdAddr([58, 72, 9a, 70, 3b, 2c])
[link][poll_accept] connection handle ConnHandle(0) in role Peripheral accepted
[host] agreed att MTU of 251
... nothing happening anymore ...
[host] disconnection event on handle 0, reason: Remote User Terminated Connection

Using Web Bluetooth API with chrome on android everything works fine.

[timokroeger]

Windows:

Android: