@mmbermudeza You'll need to build the entire Pycom image and for that you need the full ESP-IDF too but it doesn't take very long to build. You don't need any IDEs, just the free compilers. Start with the instructions at https://github.com/pycom/pycom-micropython-sigfox#the-esp32-version to setup your build environment but before the make.... flash step move to these instructions instead: https://github.com/pycom/pycom-micropython-sigfox/blob/master/esp32/README.md I gave some build tips on the other thread so so may be worth a quick read if you get stuck https://forum.pycom.io/topic/1173/no-python-prompt-after-downgrading-firmware/2 thread where Programming is simply over the serial port, just like a firmware upgrade