3 months, 4 weeks ago.
Why isn't my nRF52-DK showing up in Mbed Studio?
Whenever I connect my nRF52-DK to my PC, Mbed Studio simply gives me the message "Warning: The detected device 'USB Composite Device' does not support debugging. Debug functionality has been disabled."
I have the latest version of nRFgo Studio and the bundled JLink drivers, as well as Mbed Studio 0.5.3.
3 months, 3 weeks ago.
try to start the DK in bootloader mode (press and hold the reset-button, then connect the USB-cable). The DK should be recognised are mass-storage as usual but will be named "bootloader" or something like that.
To this storage, drag-and-drop the Mbed Firmware for the nRF52 DK, which can be found here:
Just go to "Interface MCU firmware" select "Mbed" and click download(the file should be named "nrf5x_atsam3u2c_if_mbed_V0221_11012017.bin"). After that the DK reboots, flashes the Mbed Firmware and should start blinking. Unplug it and plug it in again. Now Mbed Studio should recognise it.