MEGA R3 ATmega2560 WiFi ESP8266, Flash 32 MBCH340G, Micro-USB RobotDYN

Features

• ATmega2560 and ESP8266 fully integrated on one board
• ESP8266 with 32 Mbit flash memory
• Onboard USB to serial converter CH340G
• USB programming for both ATmega2560 and ESP8266
• DIP switch system for flexible serial routing
• Multiple hardware serial ports on ATmega2560
• High number of digital and analog I O pins
• Single power input supplies both processors

Technical Details

• Main microcontroller ATmega2560
• WiFi module ESP8266 with 32 Mbit flash
• USB to serial converter CH340G
• Operating voltage 7 to 12 volts
• Logic level 3.3 volts
• Clock frequency 16 MHz

Power and Clock

• Input voltage 7 to 12 volts
• ESP8266 powered internally at 3.3 volts
• ATmega2560 operating frequency 16 MHz

DIP Switch Configuration

Pinout Overview

• ATmega2560 digital pins D0 to D53
• Analog inputs A0 to A15
• Multiple hardware serial ports RX0 TX0 to RX3 TX3
• ESP8266 connected through selectable serial interface
• VIN, 5V, 3V3, and GND power pins

Applications

• IoT gateways and controllers
• WiFi enabled automation systems
• Complex sensor networks
• Educational and prototyping projects
• Serial communication testing platforms

Arduino Test Code

Set DIP switches 1, 2, 3, and 4 to ON and switches 5, 6, 7, and 8 to OFF to program the ATmega2560. Select Serial3 for ESP8266 connection.

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
}