Arduino Xbee sensor expansion board V5, Bluetooth interface with RS485 BLUEBEE

Feature: Extension of 14 digital IO ports (12 servo interface) and power; Six analog IO ports and power; One digital external power port terminal; Digital-port external power supply and an onboard power supply automatic switching; One External power input terminal and an input pin; RS485 interface; Reset button; Xbee/Bluetooh Bee Bluetooth wireless data transmission interface; APC220/Bluetooh V3 Bluetooth wireless data transmission interface; IIC/I2C/TWI interface; 3.3V output port; SD card module interface