Greetings,
Our system consists of three BLE sensors using an nRF52840 to send data back to a central tablet or PC. We are receiving reports that the sensors take a long time to connect to PCs running Windows 11. Once connected, it does not seem the link is stable; sometimes the PC will list the sensor as paired, but there does not seem to be any communication.
This issue does not seem to present when the central receiver is an Android tablet or PC running iOS (very limited testing on the latter).
I used an SDK configured as a BLE sniffer and Wireshark to capture communication between a sensor and a (separate) PC running Windows. I don't have much experience with BLE communications, but it seems like there is a PHY negotiation issue - the systems agree to PHY 2M, but somehow there is a mismatch later?
I have attached the Wireshark capture of the interaction; any insight would be appreciated.
Thank you,