Hello,
Setup : M1 Macbook Pro 2021, WireShark Version 4.0.3, nRF52840 BlueTooth Sniffer : sniffer_nrf52840dongle_nrf52840_4.1.1.hex
I have a nRF52840 hooked up and successfully receiving data via WireShark on my M1 Macbook Pro. I'm writing a BlueTooth battery monitor for a new electric motorbike. We need to get basic battery information from the battery BMS (like the information returned from the Smart BMS app). I thought this would be a simple case of sniffing the right packets and then updating our Bluetooth code. Unfortunately, I can not get the Read and Write information from WireShark. I get a CONNECT_IND message and then nothing else. I actually sometimes don't see the CONNECT_IND message - I have to connect several times for it to appear.
Can the nRF52840 do this kind of sniffing - I read somewhere that the other messages might be on another channel and it can't change channel (that doesn't seem right to me).
Any help is greatly appreciated. I attach a screenshot of WireShark at the point where it got the CONNECT_IND message (this took several attemtps), you can see SmartBMS running on the Mac too. Then I request the battery data - the second screenshot - and you can see the SmartBMS has the data but I'm still stuck on the CONNECT_IND message - I get no further comms until I discount (and the broadcast restarts).
The filter is the ID for the battery and the ID for my machine:
btle.advertising_address == 96:69:08:02:04:fd || btle.initiator_address == f0:2f:4b:06:61:f0
Removing this and sifting through the resulting stream of messages shows the same result.
I'm connecting to a standard LIFEP04 battery bank to run my tests. I also attach the WireShark output file.
Thank you
Regards
Raj
