Specifications:

• Operating Voltage (logic level): 5V
• 8 analog inputs ports: A0 ~ A7
• 14 Digital input / output ports: TX, RX, D2 ~ D13
• 1 pair of TTL level serial transceiver ports RX / TX
• Using Atmel Atmega328P-AU MCU
• There is a bootloader installed in it
• Standard 0.1” spacing DIP (breadboard friendly).
• Manual reset switch.