Features:
Support RS485
Support Xbee (Xbee pro)
Support Bluetooth
Support APC220
Support SD card read/write
1. extension of 14 digital IO ports (12 servo interface) and power;
2.6 analog IO ports and power;
3.1 digital external power port terminal;
4. Digital-port external power supply and an onboard power supply automatic switching;
5.1 External power input terminal and an input pin;
6.RS485 interface;
7. reset button;
8.xbee/Bluetooh Bee Bluetooth wireless data transmission interface;
9.APC220/Bluetooh V3 Bluetooth wireless data transmission interface;
10.IIC/I2C/TWI interface;
11.3.3V output port;
12.SD card module interface
