The board used in this community contribution is a STM32F401RE based board from GHI Electronics called BrainPad.
These pins can be used for:
- 1 x TX/RX
- 4 x PWM
- 4 X ADC
- 1 x I2C
- 1 x SPI
Further information can be found here or here where schema can be found.
Checkout as well the C# managed helpers for this board.