Use FB HTTPClient for data exchange in JSON

[Sergio Bertana]

The JSON format is increasingly used for data scrambling with HTTP servers, so here is a simple example that shows how to send data in JSON to a server. Here is the simple listing of the PHP script to load on the server.

if (isset ($ _ REQUEST ['Post']))
$ RxMessage = $ _ REQUEST ['Post']; //Message received
else
$ RxMessage = file_get_contents (“php: // input”); //Message received

// I collect JSON request and return the values.

$ ARx = json_decode ($ RxMessage, true); // Rx data array
echo “IdProbe =”. $ ARx ['IdProbe']. ”, Temperature =”. $ ARx ['Temperature'];

To simply test the script from the browser it is possible to pass the parameters in GET, for this reason I have managed the variable "Post". Then from browser to test the script type:

"http://URL/Test.php?Post={"IdProbe": 10, "Temperature": 20.5} "

You will get the answer:

IdProbe = 10, Temperatures = 20.5

Here is the complete program printing HTTPClientExample to transfer to a system SlimLine (Download program).

[Authorless]

Where can you download the “eLLabNetworkLib_A700” library necessary to use the “HTTPClient” FB?

[Sergio Bertana]

You don't need the library, if you download the post program you will find everything you need inside. If you want to use the HTTPClient FB in other projects, you can simply import it from this project.

Anyway, I put the new version of the library online to download it from the site.

[Author]

Post