Hi, I'm having problems negotiating DLE with a nRF52840.
I'm sending a LL_LENGTH_REQ (251 octets and 2120ms time) to nRF52840 from an ESP32.
According to the spec. those parameters are valid. For some reason the nRF52840 responds with LL_LENGTH_RSP (251, 2704ms)
2704ms only valid for 2mb phy, and not supported by ESP32, so the ESP32 responds with a LL_REJECT_IND.
Now the link just dies, according to the sniffer no device sends a disconnect, and after a few seconds I get a connection timout on the ESP32.
The disconnect event on the nRF52840 comes quickly after it receives the LL_REJECT_IND, while the disconnect event on the ESP32 takes a few seconds, I suspect that the nRF52840 just ignores the link after the LL_REJECT_IND and therefore it times out for the ESP32.
So there are one primary problem, which is why nRF52840 doesn't want to accept LL_LENGTH_REQ (252, 2120)
And the secondary issue is why the link is lost without someone making an active disconnect.
I have attached .cfg file with air traces (opened by Frontline Protocol Analyzer) and also a screenshot of valid LL_LENGTH_REQ parameters.
SDK: nRF5_SDK_15.0.0_a53641a
Softdevice: 6.1
Thank you
Jakob