scum_programmer install Install the latest Embedded Studio for ARM, v4.52c known to work Download the latest nRF SDK, unzip the nRF5_SDK_*.zip into C:/nrf, version 16.0.0 known to work build & load Clone repository Copy scum_programmer_firmware into C:/nrf/examples/peripheral Double click on C:\nrf\nRF5_SDK_17.0.2_d674dde\examples\peripheral\scum_programmer_firmware\pca10056\blank\ses\uart_pca10056.emProject Ctrl + F7 to build Plug in the nRF52840-DK into the PC via USB port Target > Connect J-Link Target > Erase all Target > Download solution run Find the COM port of your nRF52840-DK in the Device manager Edit scum_programmer_software/comm.py to set variable programmer_port to that COM port Run scum_programmer_software/comm.py, no command line parameters Currently takes forever because of #6