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

The Mega + WiFi R3 ATmega2560 + ESP8266 board is a powerful hybrid development platform that combines the capabilities of a traditional Arduino Mega with built-in WiFi functionality. It integrates the ATmega2560 microcontroller and the ESP8266 WiFi module on a single PCB, making it an excellent solution for IoT, automation, and advanced embedded systems.

This board eliminates the need for separate WiFi modules or shields, simplifying wiring and reducing overall project complexity. It features 32Mb (megabits) of flash memory for the ESP8266, allowing more space for firmware and IoT applications.

One of its key strengths is flexibility: both the ATmega2560 and ESP8266 can operate independently or together, depending on how you configure the onboard DIP switches. This allows developers to:

• Upload code to the Arduino Mega

• Program the ESP8266 separately

• Enable serial communication between both chips

The board uses a CH340G USB-to-TTL converter, ensuring stable USB communication with a computer for programming and debugging.

Features:

• Combines ATmega2560 + ESP8266 WiFi on one board

• Built-in 32Mb flash memory for ESP8266

• CH340G USB-to-serial interface

• DIP switches for flexible operation modes

• Supports independent or combined MCU operation

• Compatible with Arduino IDE

• WiFi 802.11 b/g/n (2.4GHz) support

• No need for external WiFi shield

Specifications:

• Microcontroller: ATmega2560

• WiFi Chip: ESP8266

• Flash Memory (ESP8266): 32Mb

• Clock Speed: 16 MHz

• Operating Voltage: 5V

• Digital I/O Pins: 54

• Analog Inputs: 16

• USB Interface: Micro USB (CH340G)

• Communication: UART, SPI, I2C, WiFi

• Power Input: 5V USB or 9–24V DC

• Dimensions: ~106 × 54 mm

Applications:

• IoT (Internet of Things) projects

• Smart home automation systems

• Wireless sensor networks

• Data logging with cloud connectivity

• Robotics with remote control

• Industrial monitoring systems

• Web server and MQTT-based systems