====== FYSETC AIO II ======

  * https://wiki.fysetc.com/AIO_II/
  * https://forum.fysetc.com/t/aio-ii-v3-2-all-in-one
  * https://github.com/FYSETC/Marlin-2.0.x-FYSETC
  * https://github.com/FYSETC/Bootloader-STM32F103
  * https://github.com/FYSETC/FYSETC-AIO_II