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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user63214
Looks like the the MCU is crashing when I write to Serial3 or when it receives any data. I can call Serial3.setup fine. Being new to STM32 I'm not sure where to start looking. Maybe st-util and gdb but I'm pretty green with gdb.
This board has a micro USB connector, maybe I'll switch gears and see if I can get anything going on that for the time being.