arduino-web-server-mega-2560-r3-built-in-esp8266/

[utterances-bot]

Arduino - Web Server (Mega 2560 R3 built-in ESP8266)

This tutorial goes over how to use the Mega 2560 R3 built-in ESP8266 and create a web server by flashing the onboard ESP8266 with AT firmware which only requires programming only the ATmega2560. 📶

https://www.gabrielcsapo.com/arduino-web-server-mega-2560-r3-built-in-esp8266/

[jewing18]

Well done sir. Worked flawlessly for me. Thank you for not spreading false information!

[gabrielcsapo]

@jewing18 let me know if you want to see any other content! Thanks for the kind words!

[AmirSamanMirjalili]

frankly i most say, this post is the only working guide for this board keep it up and THANKS!!

[AmirSamanMirjalili]

Just one question, and it's the hard one, I just figured out that it is possible to program mega2560 through wifi via a framework called esp_link and this youtube video shows how to do it. My problem is that the video worked with an independent esp-01 module. It is easy to figure out the connections between mega2560 and esp, but here in this Mega 2560 R3 built-in ESP8266 board, I can't figure out the relationship needed to program mega2560 via esp8266 through wifi. I appreciate it if you, please help me

[googygreg]

Thank you for the excellent instructions! I did fine till the test code from WiFiEspAT library - and I get a timeout error... AT+GMR returns good values. Then I get this error: Exit Status 1: 'mySSID' was not declared in this scope. I assume Exit Status 1 means successful UL of sketch, so I forged ahead to discover the TX/RX switch was already in the TX-3/RX-3 position instead of TX-0/RX-0 position for all of the previous code. Is that significant?

[googygreg]

SSID and PW must be quoted.

[ReinierGielen]

Do you have any suggestion how to fix the timeout issue during uploading sketch ? This randomly occurs. Sometimes it works every time and sometimes it always timesout. The boerd is still running my old sketch and I still get data in the serial monitor
But at the moment I can not load a new sketch

[googygreg]

I had similar problem. Must use short, shielded USB cable that came with the Arduino. I never could get Arduino Mega with built in WiFi to ever: make a connection to my WiFi (client) nor offer a connection to (Arduino) AP. I went back to Arduino Mega and a cable. WiFi wasn't worth the hassle.

[Astra04]

can you help me please mine is stuck at waiting for wifi connection

[resmithn]

Flash went okay received: Hard resetting via RTS pin. Changed the switches as described [5 & 6 ON] When trying the AT command. receive the following:
14:37:54.667 -> ready
14:38:07.420 -> AT
14:38:07.420 ->
14:38:07.420 -> ERROR
14:38:37.388 -> AT GMR
14:38:37.388 ->
14:38:37.388 -> ERROR
Appreciate any help you can provide.
Thank You.

[igs3000]

Dear Gabriel J. Csapo,
Thank you for your Excellent Instructions.
Everything worked good as it is.
I never saw such a clean instructions for this board anywhere else.

After purchasing this "Arduino Mega 2560 with built-in WiFi", I could not understand the way to use it. So, meaninglessly I kept that for several months.
Your instructions simply gave life for that board.

Thank you.

[igs3000]

Those who are not having gy-21p sensor, can comment some lines for testing the WiFi functionality and the web server code :

#define NAME_OF_SSID "Tenda_D360D0"
#define PASSWORD_OF_SSID "xxxxx"

//#include <Adafruit_BMP280.h>
#include <WiFiEspAT.h>

//Adafruit_BMP280 bme;

WiFiServer server(80);

void setup()
{

Serial.begin(115200);
while (!Serial)
;
Serial.println("Setting up...");
// if (!bme.begin(0x77)) // depending on the chip you have the i2c address is either 0x77 or 0x77
// {
// Serial.println("Could not find a valid BMP280 sensor, check wiring!");
// while (1)
// ;
// }

Serial3.begin(115200);

WiFi.init(Serial3);
Serial.println("Setting up wifi...");
if (WiFi.status() == WL_NO_MODULE)
{
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true)
;
}

WiFi.begin(NAME_OF_SSID, PASSWORD_OF_SSID);
Serial.println("Waiting for connection to WiFi");
while (WiFi.status() != WL_CONNECTED)
{
delay(1000);
Serial.print('.');
}
Serial.println();

server.begin();

IPAddress ip = WiFi.localIP();
Serial.println();
Serial.println("Connected to WiFi network.");
Serial.print("To access the server, enter "http://");
Serial.print(ip);
Serial.println("/" in web browser.");
}

void loop()
{
float temp = 10; //(bme.readTemperature() * 1.8) + 32;
float pressure = 10;// = bme.readPressure();
float altitude = 10 ; // bme.readAltitude(1010);

WiFiClient client = server.available();

if (client)
{
IPAddress ip = client.remoteIP();
Serial.print("new client ");
Serial.println(ip);

while (client.connected())
{
  if (client.available())
  {
    String line = client.readStringUntil('\n');
    line.trim();
    Serial.println(line);

    // if you've gotten to the end of the HTTP header (the line is blank),
    // the http request has ended, so you can send a reply
    if (line.length() == 0)
    {
      // send a standard http response header
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println("Connection: close"); // the connection will be closed after completion of the response
      client.println("Refresh: 5");        // refresh the page automatically every 5 sec
      client.println();
      client.println("<!DOCTYPE HTML>");
      client.println("<html>");

      client.print("<h4>Tempature: ");
      client.print(temp);
      client.print("F");
      client.print("</h4>");

      client.print("<h4>Pressure: ");
      client.print(pressure);
      client.print("</h4>");

      client.print("<h4>Altitude: ");
      client.print(altitude);
      client.print("</h4>");

      client.println("</html>");
      client.flush();
      break;
    }
  }
}

// close the connection:
client.stop();
Serial.println("client disconnected");

}
}

[gabrielcsapo]

Dear Gabriel J. Csapo,
Thank you for your Excellent Instructions.
Everything worked good as it is.
I never saw such a clean instructions for this board anywhere else.

After purchasing this "Arduino Mega 2560 with built-in WiFi", I could not understand the way to use it. So, meaninglessly I kept that for several months.
Your instructions simply gave life for that board.

Thank you.

Glad it was helpful! It was a similar problem for me so I am happy to help others make use of the board!

[arsant68]

HI
Thank you Gabriel J. Csapo to share this tutorial.
Following steep by steep your tuto, I was able to update the esp firmware ( running now 2.2.xx AT )and using as websever to monitor my solar panels.
Just a question, did you managed to run a webserver and at same time posting data to thingspeak ?
I´m struggling to run server and client at same time, as I used to do with ethernet shield.
I can post data to thingspeak but only when not running webserver at same time.
I´m using WiFiEspAT lib and AT firmware 2.2xx.
Again, thanx to spend time with your tuto... well documented and explained.

[XohaibQ]

Hi
Link is not working. Can you provide any alternative link, Please.