https://devzone.nordicsemi.com/f/nordic-q-a/73040/regarding-nrf52840-the-reset-register-value-read-after-reset-is-0x00000008At present, our device products use nrf52840, and the official component package used is V15.2.0. I found that using Bluetooth and other Bluetooth long connections will reset after about 5 hours. I write the official log record in the app_error_fault_handleren-USTelligent Community 13Sat, 20 Mar 2021 11:43:57 GMThttps://devzone.nordicsemi.com/thread/301043?ContentTypeID=1Sat, 20 Mar 2021 11:43:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a0250021-9f51-4957-a1d6-9bcdd464eeddTurbo J<p>See PS, RESETREAS register. Value 0x08 is Lockup Reset.</p> <p></p> <p>Can happen when the stack register itself gets corrupted in buffer or stack overflow, as this causes a fault <em>inside</em> the hard fault handling =&gt; lockup.</p><div style="clear:both;"></div>