BLE - nRF5340-DK: Unsolicited auto-reconnect by PC

RE: BLE - nRF5340-DK: Unsolicited auto-reconnect by PC

Turbo J — Thu, 23 Apr 2026 08:20:21 GMT

Try a fresh install of windows with as little DELL software and drivers as possible. Don't remember if our customer tried that - they are OK with just turning BT off and on again...

You could also try booting Linux (e.g. from USB stick).

RE: BLE - nRF5340-DK: Unsolicited auto-reconnect by PC

iotdeveloper — Thu, 23 Apr 2026 06:28:37 GMT

Hello,

I'm currently using a Dell Latitude 5550, and after closing the PC application, I have to turn off Bluetooth using the button in the Windows taskbar. Only then does the BLE connection disconnect, and the peripheral (nRF5340-DK) starts advertising again.

RE: BLE - nRF5340-DK: Unsolicited auto-reconnect by PC

Turbo J — Wed, 22 Apr 2026 14:15:42 GMT

Worse: Its likely your PC/OS configuration. Windows normally closes BTLE connections when no app keeps it open. Some profiles like HID are always connected though.

I've seen this problem on some DELL models, the OS or some 3rd party software refuses to disconnect. Very annoying, and we could not identify the source -or reproduce the problem- here.