MCU: MD-328D 32K Flash 2K SRAM 16bit ADC
    Working Voltage : 3.3V and 5V Selectable
    Input Voltage: DC 5.5 to 12V
    3.3V Output Current : 300mA MAX
    Bootloader preprogramming : Massduino MD-328D

Upload sketch and communication

    Download and install Arduino IDE :
    Download Massduino support package:
    Install Massduino support package:
    Download USB to UART cable driver :
     Write code , uploading sketch , enjoy it!


    Q, What do you mean by 3.3v selectable?

     A,  The system can be working under 3.3V or 5V which can be selected by a jumper . 

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