Arduino Hat for Raspberry Pi
Arduino is a massive ecosystem, if there's a way for the Raspberry Pi GPIO interface to adapt to Arduino pinouts, it is possible to use the Pi together with vast Arduino shields and hardware/software resources. The ARPI600 is just intended for this. What's more, the ARPI600 also support XBee modules, make it easy to add wireless feature to your great project. This hat supports the Raspberry Pi 1 Model A+, Raspberry Pi 1 Model B+ and Raspberry Pi 2 Model B.