Raspberry Pi 1 2 3 4 Model B B+ A+ Expansion Board, Supports Arduino XBee
Compatible with Arduino UNO, Leonardo, easy to connect with various Arduino shields
Standard Raspberry Pi 40PIN GPIO extension header, Supports Raspberry Pi A+/B+/2B/3B/3B+/4B and later versions , Jetson Nano
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)