MEGA R3 + WiFi (ATmega2560 ESP8266)

It is a customized version of the classic ARDUINO MEGA R3 board, A.K.A RobotDyn MEGA+WIfi. Full integration of microcontroller Atmel ATmega2560 and IC Wi-Fi ESP8266 with 32 MB flash memory, and USB-TTL converter CH340G on one board. All modules can work together or independently.

Specifications

Jumper

On the board where the switch of mode of operation with 8 position

	1	2	3	4	5	6	7	8
CH340 connect to ESP8266 (upload sketch)	OFF	OFF	OFF	OFF	ON	ON	ON	NoUSE
CH340 connect to ESP8266 (connect)	OFF	OFF	OFF	OFF	ON	ON	OFF	NoUSE
CH340 connect to ATmega2560 (upload sketch)	OFF	OFF	ON	ON	OFF	OFF	OFF	NoUSE
CH340 connect to Mega2560 COM3 connect to ESP8266	ON	ON	ON	ON	OFF	OFF	OFF	NoUSE
Mega2560+ESP8266	ON	ON	OFF	OFF	OFF	OFF	OFF	NoUSE
All modules work independent	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NoUSE

Also, have switch for change of connecting port between ATmega2560 and ESP8266

After choosing the mode of the board can proceed to set up the IDE

It is important that when the ESP8266 module is programming, it is necessary to press the button “Mode”

To begin open the Arduino IDE programming environment and go to settings

Then in the window that appears in the row, Additional Boards Manager URLs (marked in red) insert http://arduino.esp8266.com/stable/package_esp8266com_index.json link for installation in Arduino IDE additional scripts that would work with the modules ESP8266 and click OK

Then go to the Tools> Board> Boards Manager

In the window that appears, scroll through the list down to the script esp8266 by ESP8266 Community and click.

In the lower right corner will be able to select the version of the software, select the version 2.1.0 (the newest) and click the Install button

After installation, close the window and go to Tools> Board and see the list of available devices on the chip programming ESP8266

Next, you need to select the card as shown in the picture (Generic ESP8266 module)

Select the upload speed - 115200

Arduino sketch for test

==========test sketch for ATmega2560===========

 void setup()
{
  Serial3.begin(115200);
  pinMode(13,OUTPUT);
  delay(500);
  Serial3.println("AT+CIPMUX=1");
  delay(2000);
  Serial3.println("AT+CIPSERVER=1,5000");
  delay(2000);
  Serial3.println("AT+CIPSTO=3600");
  delay(2000);
}

 

void loop()

{
   while(Serial3.available())
  {
    char Rdata;
    Rdata=Serial3.read();
    if(Rdata=='A'|Rdata=='a')
    {
      digitalWrite(13,HIGH);
      delay(50);
    }
    else if(Rdata=='B'|Rdata=='b')
    {
      digitalWrite(13,LOW);
      delay(10);
      digitalWrite(13,HIGH);
      delay(10);
      digitalWrite(13,LOW);
    }
    else
    {
      digitalWrite(13,LOW);
    }
  }
}