Send data to server with EtherCard library.

Projects Networking, Protocols, and Devices
1

To send data to thingspeak you can write this on adrees bar:
https://api.thingspeak.com/update?api_key=CTRBIYTTYTAJB31G&field1=5
With arduino you can do it like this(full example here):

    byte sd = stash.create();
    stash.print("temp=");
    stash.print(value); // temp value
    stash.save();    
    Stash::prepare(PSTR("POST /update HTTP/1.0" "\r\n"
      "Host: $F" "\r\n"
      "Connection: close" "\r\n"
      "X-THINGSPEAKAPIKEY: $F" "\r\n"
      "Content-Type: application/x-www-form-urlencoded" "\r\n"
      "Content-Length: $D" "\r\n"
      "\r\n"
      "$H"),
    website, PSTR(APIKEY), stash.size(), sd);

I have build a simple webpage to insert values via address bar:
http://jimpir.atwebpages.com?temp=30
My web aplication gets the value by this:

<?php 
if (isset($_GET['temp'])) { 
    echo "The variable value is ", $_GET['temp'], "."; 
} else { 
    echo "Variable not set."; 
} 
?>

How can i make stash prepare to send values to my own webpage with Arduino?

2

Either change your application on the server to accept data by POST requests or change the Stash string to match your GET request.

As the above is just an excerpt this is all we can help because we have no clue about how you get that temperature value.

3

Updated! The first thing I have to do is to change request method as you said!

4

I still have no clue how you get the temperature value on the Arduino. Post the Arduino code you already have.

5

I have not build full code but the variable value is a floating point number that contains the temperature value of dallas temp sensor.

sensors.requestTemperatures();
float value = sensors.getTempCByIndex(0)

I think it will work if i change the POST request to GET request

6

I think it will work if i change the POST request to GET request

Do that and post your complete code if it doesn't work.