Microcontroller
Each control board has its own microcontroller. You can regard it
as the brain of your board.
Microcontrollers are usually from ATMEL. Before you load a new
program on the Arduino IDE, you must know what IC is on your
board. This information can be checked at the top of IC.
The microcontroller used in this board is ATMEGA328P-AU.
D13 LED
There is a built-in LED driven by digital pin 13. When the pin is
HIGH value, the LED is on, when the pin is LOW, it's off.
TX LED
Onboard you can find the label: TX (transmit)
When the board communicates via serial port, send the message,
TX led flashes.
RX LED
Onboard you can find the label: RX(receive )
When the board communicates via serial port, receive the
message, RX led flashes.
Power LED
LED on means that your circuit board is correctly powered on.
Otherwise LED is off.
USB Connection
You can power the board via USB connection. Or can upload the
program to the board via USB port.
Connect the board to PC using a USB cable via USB port.
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