Seeeduino v4.0 is an ATMEGA328 Microcontroller development board, compatible with Arduino UNO. It uses the Atmel ATMEGA328P-MU, a high performance, low power AVR 8-Bit Microcontroller. Seeeduino v4.0 has 14 digital input/output pins (which 6 can be used as PWM outputs) and 6 analog pins. ATMEGA16U2 is used as USB bus converter chip (USB to serial interface), like in the Arduino UNO R3 board.
What is new in V4.0:
I2C and Serial Grove connector.
Micro USB and DC Jack.
Inherits all of Arduino UNO R3 features.
Compatible to Arduino UNO R3 pin layout, screw hole and dimensions.
Improved on extensibility and convenience.
Install the Arduino IDE and install USB drivers following the same instructions for Arduino UNO R3.