Compiling

• Place NRF5 SDK 12.1 next to this directory (../nRF5_SDK_12.1.0_0d23e2a/)
• Set compiler path in ../nRF5_SDK_12.1.0_0d23e2a/components/toolchain/gcc/Makefile.posix
• Install python 2.7 and pip install nrfutil (and maybe add ~/.local/bin to $PATH)
• Install make
• Install gcc-arm-none-eabi
• Execute make

BLE firmware update

1. Install NRF Connect
2. Connect DFU boot pins
3. Connect to DFUTARG
4. Select DFU

Boot pin configuration

1. BLE DFU mode
2. RC mode

Debug pins (SWD)

Pictures