Device Restart with reset reason 4 after connecting BLE and on Mobile Application restart

[umrsraj]

Hello Everyone,

I am using NRF52840 with Custom board, SES v5.20, SDK 15.1.0, IONIC android App(as Central)

1)My problem is, our nrf52840 board will restart once after successful BLE connection then again it will connect and then no restart just work normal and fine and the reset reason will be 4

2)and also controller restart suddenly(not every time, only sometimes) when i do clear data in my android application on that time also we get reset reason 4 only.

i found that reset reason 4 means- soft reset from https://devzone.nordicsemi.com/f/nordic-q-a/48446/how-to-detect-cause-of-reset but i am not able to understand what is soft reset means exactly  

and how i can solve this issue, 

Thanks in advance

Best Regards,

Raj.

[Susheel Nuguru]

There are only three reasons for the chip to reset when it has stable power supply.

1. Application calling NVIC_SystemReset() explicitly.
2. Watchdog timeout reset
3. Wakeup from the System Off (deep sleep)

Start your application in debugger mode and put breakpoints to all the places that match any one or more of the above three points (breakpoints at NVIC_SystemReset, wdt ISR if configured or trigger to system off)and reproduce your reset. You will find that one of your breakpoint will be hit. You can then understand more about the contexts and nature of your reset.. 

[ricardo.oliveira]

Hi. I'm having the same problem and I still don't know why my board is resetting. Did you find out why?

[Susheel Nuguru]

Please create a separate ticket as the issue cannot be same as this thread user was using a very old version of SDK, which you most likely are not using. Open a separate ticket and give as much info as possible regarding your test setup.