ESP8266 Community Forum

Posted: **Mon Jun 22, 2015 12:40 am**

Hey all I have the ESP8266 module and I have already set it up and it's working good using this as my guide (http://allaboutee.com/2015/01/02/esp8266-arduino-led-control-from-webpage/). However, when I run this HTML page code here:

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<html>
   <head>
      <title>ESP8266 LED Control</title>
   </head>
   <body>
   <button id="6894" class="led">Toggle Pin 13</button> <!-- button for pin 13 -->
      
   <script src="jquery.min.js"></script>
   <script type="text/javascript">
      $(document).ready(function(){
         $(".led").click(function(){
            var p = $(this).attr('id'); // get id value (i.e. pin13, pin12, or pin11)

            $.get("http://192.168.9.60:80/", {pin:p}); // execute get request
         });
      });
   </script>
   </body>
</html>

I have to send the number 6894 instead of 13 because for some reason its not sending out the correct number. If i send 13 then what it receive is 112. When i send 6894 i receive 689.

My arduino code is this:

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*/
//====================================================================================
//                                [The SSDI of the current wifi router]
//                                |              [The password of the current wifi router]
//                                |              |
//                                V              V
String SSIDandPW    = "AT+CWJAP=\"xxxxxxwifi\",\"xxxxxx123\"\r\n";

//                                      [The STATIC IP of the wifi module]
//                                      |                [The main IP of the router]
//                                      |                |              [The default submask]
//                                      |                |              |
//                                      V                V              V
String eIPrIPmask   = "AT+CIPSTA_DEF=\"192.168.9.60\",\"192.168.9.1\",\"255.255.255.0\"\r\n";
const int ledDimmer = 5;         // Used to dim the LED strip (digital Pin 3)

SoftwareSerial esp8266(9,10);    // Pin D10 to=> TX on ESP8266 | Pin D9 to=> RX on ESP8266
//================================= End define WiFi Module =================================
//==========================================================================================

void setup() {
  Serial.begin(19200);
  
  pinMode(13, OUTPUT); //Just for a wifi demo from html page
  
  //================================ Start Setup WiFi Module =================================
  //==========================================================================================
  esp8266.begin(19200);
  sendData("AT+RST\r\n",                    2000, true); // Reset module
  sendData("AT+CWMODE=1\r\n",               2000, true); // Configure as access point
  sendData(SSIDandPW,                       5000, true); // Pass of current wifi
  sendData("AT+CIPMUX=1\r\n",               2000, true); // Configure for multiple connections
  sendData("AT+UART_DEF=19200,8,1,0,0\r\n", 2000, true); // Set baud of COM
  sendData(eIPrIPmask,                      2000, true); // Default network mask IP
  sendData("AT+CIPSERVER=1,80\r\n",         2000, true); // Turn on server on port 80
  sendData("AT+GMR\r\n",                    2000, true); // Get firmware version
  sendData("AT+CIFSR\r\n",                  2000, true); // Get ip address
  Serial.print("Server is now running!");
  //================================ End Setup WiFi Module ===================================
  //==========================================================================================
}


void loop() {
  //=========================================== Start Loop WiFi Module ===========================================
  //==============================================================================================================
  if(esp8266.available()) {                               // check if the esp is sending a message 
    if(esp8266.find("+IPD,")) {
      delay(500);
      int connectionId = esp8266.read() - 48;             // subtract 48 because the read() function returns
          
      esp8266.find("pin=");                               // advance cursor to "pin="
      int retunedNum = (esp8266.read() - 48) * 100;       // get first number (example: 123.. this would be "1")
      retunedNum += (esp8266.read() - 48) * 10;           // get second number (example: 123.. this would be "2")
      retunedNum += (esp8266.read() - 48);                // get last number (example: 123.. this would be "3")
      String closeCommand = "AT+CIPCLOSE=";               // make close command
      Serial.print("returned: ");
      Serial.print(retunedNum);
      Serial.print("----------");
      closeCommand += connectionId;                       // append connection id
      closeCommand += "\r\n";     
      sendData(closeCommand,                250, true);   // close connection
      //digitalWrite(retunedNum, !digitalRead(retunedNum));   // toggle pin
      if (retunedNum == 6894) {
        Serial.print("OFF");
        digitalWrite(ledDimmer, LOW);
      } else if (retunedNum == 6904) {
        Serial.print("ON");
        digitalWrite(ledDimmer, HIGH);
      } else if (retunedNum == 689) {
        digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(1000);              // wait for a second
        digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
        delay(1000);              // wait for a second 
      }
    }
  }
  //============================================ End Loop WiFi Module ============================================
  //==============================================================================================================
}

//                     [The data/command to send]
//                     |                  [The time to wait for a response]
//                     |                  |                [Print to Serial window (true = yes | false = no)]
//                     |                  |                |
//                     V                  V                V
String sendData(String command, const int timeout, boolean debug) {
  String response = "";
  long int time   = millis();
  
  esp8266.print(command);          // send the read character to the esp8266
  
  while((time + timeout) > millis()) {
    while(esp8266.available()) {
                                   // The esp has data so display its output to the serial window
        char c = esp8266.read();   // read the next character.
        response += c;
    }
  }
  
  if (debug) { Serial.print('Returned: ' + response); }
  return response;
}

And the console output is this:

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14880AT+RST


OK
14880
"qXÑ{ÂB!É
1Â±þ)ÒBÙa
+ò“H!a5)�#)ÒÂia%YakN‘   J!ÐCÊ!�
÷þˆ2ô
ready
14880AT+CWJAP="xxxxxxwifi","xxxxxx123"


OK
14880AT+CIPMUX=1


OK
14880AT+UART_DEF=19200,8,1,0,0


OK
14880AT+CIPSTA_DEF="192.168.9.60","192.168.9.1","255.255.255.0"


OK
14880AT+CIPSERVER=1,80


OK
14880AT+GMR

AT version:0.22.0.0(Mar 20 2015 10:04:26)
SDK version:1.0.0
compile time:Mar 20 2015 11:00:56

OK
14880AT+CIFSR

+CIFSR:STAIP,"192.168.9.60"
+CIFSR:STAMAC,"18:fe:50:0b:4e:08"

OK
Server is now running!

returned: 689----------148804 HTTP/1.1
Host: 192.168.9.60
Connection: AT+CIPCLOSE=0

0,CLOSED

OK

What I really am wanting to do is have a way to send a 10 charater and/or number string to the module instead of the limited 3 numbers above. I just am not sure what i need to add/modify in order to make it see letters/numbers and only the first 10 that i send.

Example:

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var p = 'testing123';
$.get("http://192.168.9.60:80/", {pin:p}); // execute get request

Should be shown in the serial as "testing123".

And I am also unsure as to where this "14880" is coming from???

Any help would be great!

Posted: **Tue Jun 23, 2015 4:03 am**

I don't know what jquery is .
I find that 14880 interesting -Could that be the UART speed? Its said to be putting out at 74880 . Have to study that

Your code is sending an integer " int" which can only take numbers.
You could try defining it as a String or char array maybe

Like this String p = "testing123";
Examples for Strings are in the Examples menu if you are using ArduinoIDE

Posted: **Tue Jun 23, 2015 8:03 am**

I have changed the 'p' to a string and I only can get the first 2 letters out of the 10 I set to 'p' so it's still the same problem but instead of numbers it's letters.

Posted: **Tue Jun 23, 2015 1:49 pm**

Your sendData() seems to send what you want to send OK then prints all available characters received back . If you don't want that you will have to tell it so by dropping some and only using the first 10 for example . Maybe try
Serial.println(response.substring(0, 9)); See String examples substring

Code: Select all

String sendData(String command, const int timeout, boolean debug) {
  String response = "";
  long int time   = millis();
  
  esp8266.print(command);          // send the read character to the esp8266
  
  while((time + timeout) > millis()) {
    while(esp8266.available()) {
                                   // The esp has data so display its output to the serial window
        char c = esp8266.read();   // read the next character.
        response += c;
    }
  }
  
  if (debug) { Serial.print('Returned: ' + response); }
  return response;
}

"Why it gets only 2" I don't understand what you mean
"returned: 689----------148804 HTTP/1.1" is what is returned
If you take a 10 character substring out from 0 to 9 it will give "689------"

Try that and post code and response again please.

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