how to make nrf dongle to enter reset by using software

[Dien Nguyen]

Hi support team,

i'm using nrf dongle 52840 to update firmware for orther device, but somethime i can not able to access to send some command until hard disconnect from usb port or power down system. i can not find any command to make dongle reset by using nrfutil command. Is there anyway to make it reset?
Thanks.

[Hung Bui]

Hi, 

The fundamental difference between the DK and the dongle is that the dongle doesn't have a programmer on board. Any communication for programming with the dongle is via a bootloader. 

So if the dongle is unresponsive it won't be able to do any command because the CPU is blocked. 

If you want to trigger a reset, you can think of connecting a DK (or a programmer) to the dongle ( you need to solder the header on the P1 port). You can use nrfjprog --reset when you connect the programmer/DK to the dongle.

But then it's not much point using a dongle, you can just use the DK.