Does not work after writing (nRF52840 Module)

[JamesCHANG]

Hello.

I wrote adafruit's arduino compatible bootloader via J-link.

The write seems to have been successful.

However, after that, the nrf52840 does not work.

Do you know a workaround for this?

I have already lost 10 nrf52840 modules.

The nrf52840 module I used is MS88SF2.

[Simonr]

Hi

What module exactly are you working on, you might have to recover the device due to readback protection. Please check out the nRF Command Line tools and try using the nrfjprog --recover call. This should let you reprogram the device if this readback protection is enabled.

Best regards,

Simon