Gustavo Buzogany Eboli

All the limits for the nrf52 are available at the product specification doc: https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.1.pdf 5.5V seems to be the max input voltage at the VBUS pin. The MDK board also...

~~Yes it is possible, but you will probably need to implement your own.~~ ~~https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_bootloader_modules.html~~ Edit: I misunderstood your problem. AFAIK the bootloader that comes with the MDK only allows you...

I made a few mistakes and had the same issue: could not put the stick in DFU mode. The best solution I found was to flash it through SWD using...

AFAIK you can only use nRF Connect to program the device if you are using the open bootloader. If you are using the UF2 bootloader, you should follow the docs...

This page should explain how to switch between open bootloader and uf2 bootloader: https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/programming/ Another way is using openocd on a raspberry pi: https://www.youtube.com/watch?v=R5wub5ywzTU You could also use a J-Link...

AFAIK you can't use NRF Connect to flash the software if you are using UF2 (it seems to only work with Open Bootloader). Also, AFAIK, to use circuitpython, you should...

Which bootloader are you using? UF2? open bootloader?

The firmware that comes flashed to the board depends on when you bought it, and where you bought it from: Older boards come with open bootloader, newer boards with UF2....

They are not, and now I realise that the DK has a segger chip that you probably don't have. So these instructions (the ones from adafruit), won't help you much....

In this case, maybe it's just simpler to flash the circuitpython bootloader using OpenOCD. There are pretty clear instructions in this video: https://www.youtube.com/watch?v=R5wub5ywzTU