How to make dongle restart application rather than go into bootloader mode in response to RESET?

[Peter949]

In my application, the nRF52840 dongle is hard-wired via UART port pins to the UART interface of a Wi-Fi gateway host board.
I need the nRF52 application to restart when it receives a RESET from this host board (not go into USB bootloader mode)

USB bootloader mode is however still required, when the nRF52 dongle is removed from this configuration for reprogramming (using nRF Connect programmer via USB port of the development PC). The nRF52 dongle should ideally only enter USB bootloader mode if the User presses SW1 (the user pushbutton on the dongle), not every time the reset signal is active

I'd welcome advice on how to achieve this

Thanks
-Peter

[Simonr]

Hi Peter

Might I suggest to make the Dongle go into system off mode (and then system on) when the reset signal is received? As this should keep the dongle from going into bootloader mode, while the button will still work.

Best regards,

Simon