Mega WiFi R3 Atmega2560 NodeMCU ESP8266 32Mb Memory USB-TTL CH340G Compatible For Mega

The Mega +WiFi R3 board fully integrates an ATmega2560 microcontroller (Arduino Mega R3 compatible) with an ESP8266 WiFi module featuring 32Mb flash memory and a CH340G USB-TTL converter on one PCB.robotdyn+1​

Key Features

Both modules operate independently or connected via dedicated pin headers and DIP switches for mode selection (e.g., USB to ATmega2560, USB to ESP8266, or ATmega2560-ESP8266 bridge). It offers 54 digital I/O pins, 16 analog inputs, 5V logic/operation, serial interface, 16MHz clock, and programming via Micro USB for sketches/firmware on either chip.flyrobo+2​

Power and Environment

Power input includes USB 5V (500mA max) or VIN/DC jack (9-24V), with up to 800mA output; WiFi supports 802.11 b/g/n at 2.4GHz. Operating temperature spans -40°C to +125°C, with ATmega2560 specs of 256KB flash, 8KB SRAM, and 4KB EEPROM.kitsguru+2​

Usage Notes

DIP switches simplify connections; press the ESP8266 “Mode” button during its firmware updates in Arduino IDE (select “Arduino Mega 2560” or “Generic ESP8266”). Perfect for your automation projects needing extensive I/O with IoT, like expanded SCADA or motor control interfaces.