Use this Development request to diagnose an existing application after Setup.
This application uses the nRF Connect SDK and controls a fan over Bluetooth LE.
It includes an automatic temperature-sensor mode and crashes approximately five seconds after boot.
Reproduce and diagnose the crash:
1. Build and program the existing application, asking before programming.
2. Capture the complete UART boot and fault logs.
3. Use GDB to inspect the fault, stack trace, registers, threads, and relevant application state.
4. Correlate the UART evidence with the debugger evidence.
Describe the root cause, supporting evidence, and possible fixes.
Do not modify the source code or configuration yet.
Do not erase or recover the device.