Upload to STM NUCLEO
Tested on NUCLEO-F401RE
http://uk.farnell.com/stmicroelectronics/nucleo-f401re/nucleo-board-mcu/dp/2394223?st=F401RE
Using PlatformIO
Install platformIO core: https://platformio.org/. It's also possible to use PlatformIO IDE based on Atmom. I prefer using the core CLI .
See out platformio user guide: https://guide.openenergymonitor.org/technical/compiling/
Compile and Upload
git clone https://github.com/glynhudson/stm-test
cd smt-test/blinky
pio run -t upload