ARPI600 for Raspberry Pi 1/2/3 Model B B+ A+ Plus Supports Arduino XBee Modules with Various Interface IO Expansion Board @XYGStudy Raspberry Pi 1 2 3 Model B B+ A+ Expansion Board, Supports Arduino XBee Compatible with Arduino UNO, Leonardo, easy to connect with various Arduino shields Sensor interface for connecting various sensors, Onboard RTC Onboard USB TO UART for serial port debugging, also can be configured as XBee USB adapter Onboard ADC, 10 bit, 38KSPS, 11 channels (6 channels for Arduino interface, 5 channels for sensors)