ZeroPi is based on official arduino zero but changed the mcu to SAMD21J18 to support more io pins.
ZeroPi stack on Raspberry Pi
Raspberry compatable plugin port
4 x SLOTs: stepper, dc-motor
2 x mosfet driver
2 x temperature sensor input
11 x extension genernal io or servo driver
- Install Arduino IDE , version>=1.6.5
- copy ZeroPi folder to arduino library folder
- Download SAMD M0 support from arduino IDE->Tools->Board->boards managers
- connect ZeroPi to PC and install drivers for Arduino Zero
- upload demo sketch to the board, have fun :)