Seeeduino XIAO carries the powerful CPU-ARMG; Cortex & -MO (SAMD21G18), which is a low power Arduino Microcontroller, on the other hand, this small board has a good processing performance, and needs less energy. In addition to the powerful CPU, the Seeeduino XIAO excels in many other functions. It has 14 GPIO PINs, which can be used for 11 analog PINs, 11 digital PINs, 1 I2C interface, 1 UART interface and 1 SPI interface.