Support USB to device Uart bridge
Support OTG
Support SPI program port
Support Grove Interface: 1x Uart; 3x I2C
Support 4 way encoder motor drive (Peak Current: 3A)
Support overcurrent, overloading and short circuit protection function
Motor Driver Constant Current: 4 x 2A
Standby Current: < 150mA
Output Voltage: 5V/4V/3.3V/1.8V
Input Voltage(limits): 6-16V
Size: 130mm x 110mm
Low cost
Easy to obtain (preferably with all parts in a single kit)
Easy to build (solder-free, safe)
Easy to modify and extend (hardware and software)