how to recover a custom nrf52840 board after a full erase (including UICR) and power off?

[ozanoner]

Hi, I made a mistake while working with a custom board.

I run "nrfjprog --recover", which obviously clears UICR, and then I powered the board off without writing the new firmware. 

On the board, I have SWD exposed (SWD-IO and SWD-CLK pins) but when I check the schematic I see that P0.18/RESET pin is left floating and I don't have access to this pin. 

I have a Segger j-link probe and my question is that, is there any way to get this board back to life again?

Thanks,

Ozan

[Sunil vignesh]

Hi,

Do you have nRF Connect for desktop .

If have you can visualize the board is in live or not and also you can able to program the hex files from there

https://www.nordicsemi.com/Products/Development-tools/nrf-connect-for-desktop

[Stian Røed Hafskjold]

You should be able to just flash a new FW using nrfjprog --program hexfile.hex, since you were already able to erase the chip using nrfjprog --recover. You only need the SWDIO and SWDCLK pins for this to work. Or you can use nRF Connect for desktop as Sunil vignesh suggested.