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Topic: How could I connect Arduino Mega 2560+esp8266+HTML? (Read 2245 times) previous topic - next topic


I would like to know what fails in this code which is the most used in internet, but I can't manage to connect with my Mega 2560

Code: [Select]
   #include <SoftwareSerial.h>
    #define DEBUG true
    SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make TX   Arduino line is pin 3.
                             // This means that you need to connect the TX line from the esp to the Arduino's pin 2
                             // and the RX line from the esp to the Arduino's pin 3
     void setup()
      esp8266.begin(9600); // your esp's baud rate might be different
         sendData("AT+RST\r\n",2000,DEBUG); // reset module
         sendData("AT+CWMODE=2\r\n",1000,DEBUG); // configure as access point
         sendData("AT+CIFSR\r\n",1000,DEBUG); // get ip address
         sendData("AT+CIPMUX=1\r\n",1000,DEBUG); // configure for multiple connections
         sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // turn on server on port 80
     void loop()
     if(esp8266.available()) // check if the esp is sending a message
     delay(1000); // wait for the serial buffer to fill up (read all the serial data)
     // get the connection id so that we can then disconnect
     int connectionId = esp8266.read()-48; // subtract 48 because the read() function returns
                                           // the ASCII decimal value and 0 (the first decimal number) starts at 48
     esp8266.find("pin="); // advance cursor to "pin="
     int pinNumber = (esp8266.read()-48)*10; // get first number i.e. if the pin 13 then the 1st number is 1, then multiply to get 10
     pinNumber += (esp8266.read()-48); // get second number, i.e. if the pin number is 13 then the 2nd number is 3, then add to the first number
     digitalWrite(pinNumber, !digitalRead(pinNumber)); // toggle pin    
     // make close command
     String closeCommand = "AT+CIPCLOSE=";
     closeCommand+=connectionId; // append connection id
     sendData(closeCommand,1000,DEBUG); // close connection
      * Name: sendData
      * Description: Function used to send data to ESP8266.
       * Params: command - the data/command to send; timeout - the time to wait for a response; debug - print to Serial window?(true = yes, false = no)
        * Returns: The response from the esp8266 (if there is a reponse)
       String sendData(String command, const int timeout, boolean debug)
       String response = "";
    esp8266.print(command); // send the read character to the esp8266
    long int time = millis();
    while( (time+timeout) > millis())
        // The esp has data so display its output to the serial window
        char c = esp8266.read(); // read the next character.
    return response;



Code: [Select]
<title>ESP8266 LED Control</title>

<!-- in the <button> tags below the ID attribute is the value sent to the arduino -->

<button id="11" class="led">Toggle Pin 11</button> <!-- button for pin 11 -->
<button id="12" class="led">Toggle Pin 12</button> <!-- button for pin 12 -->
<button id="13" class="led">Toggle Pin 13</button> <!-- button for pin 13 -->

<script src="jquery.min.js"></script>
<script type="text/javascript">
var p = $(this).attr('id'); // get id value (i.e. pin13, pin12, or pin11)
// send HTTP GET request to the IP address with the parameter "pin" and value "p", then execute the function
$.get("", {pin:p}); // execute get request


I try to send GET parameters but I don`t succeed that the console of the Arduino program sends the AT but there's no answer.

But that creates a LAN to connect to.

There are any incompatibilities?


You've got 4 hardware serial ports on the Mega. It makes NO sense to try to do SoftwareSerial on pins that don't support pin change interrupts on the Mega.
The art of getting good answers lies in asking good questions.

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