FIT0493 is an Arduino compatible development board from DF Robot. This board is designed with the Atmel AVR ATmega2560 as its main processor and also features an ATmega16U2 for USB interfacing. The board has three ports, one for USB, one for RS485, and one for I2C communication. Additionally, the board features 4MB of flash memory, 256K of SRAM, and 8K of EEPROM. It also includes 8 analog inputs, 10 PWM outputs, and 14 digital I/O pins.