The Arduino Nano I/O Shield acts as a expansion board for the Arduino Nano and DFRduino Nano microcontrollers. There are several different options for power input. The form factor of the Nano I/O Shieldboard is the same as the Arduino UNO/Leonardo. In addition each pinout includes 5V and GND pins for easy connection to sensors or servos. This unit comes fully assembled. The board also has a space specifically for the DFRobot bluetooth module and ACP220. Several I2C pins are also exposed.

V1.1 Update：Add a IIC interface switch now it is compatible with Arduino Nano DFRduino Nano V3 DFRduino Nano V4 and Bluno Nano