send http line to website

So basically you want to send a TCP message to port 80 to a URL and ignore the response, or handle the normal response and resend or set send error flag for abnormal or no response (times out)?

Look at the tcp send / receive commands. 

laantje

Hi All

Is it possible to send a HTTP line to a certain website like

for example: http://www.mywebsite.com/data.php?variable1=value1&variable2=value2

or if not is it possible to send it to an extern IP adres that is not in the same subnet as the PLC

can somebody show me an example if it is possible.

regards

Laantje

S7-1200 : TIA portal version?  I'm using V13.

The HTTP send request details that may help you develop your send request is found online in many places.  If you use chrome browser, enable developer mode and see what your request looks like from your browser.  You can do the same thing from your PLC.

The DATA you send is the GET or POST header which includes the URI (the part of the URL that is not the address or port).

Look here for examples:

https://www.quora.com/What-does-an-HTTP-request-looks-like 

laantje

Hi Huggy

What i want to do is to send this line to the internet.

nothing more, nothing less.

I do not want a response back

If it is possible

Can you make an example for me

i tried it, but i only can do it when it is in the same subnet and i only can send data, and not the total line.

 http://www.mywebsite.com/data.php?variable1=value1&variable2=value2

regards

marc

Build a text string with the data you want to send by hand and assign it to a string or array of strings depending on how long it ends up being.

Now use the tcp send block that creates the connection for you, send to port 80 to the correct IP address, and the data you send will get handled by the web server, routed and handled by your PC web site.

Do not try to think of it as a URI / URL with the parts after the ip address as anything other than a part of what you send.

To change the variables, you can chop the original test block into chunks and insert the proper parameter values converted to string and see what that does for you.

laantje

Hi huggy

Thanks for your answer, but it is not really helping me.

I know everything on the http site.

i am missing info on how to send it from the plc

can somebody make a simple program how to do this.

The initiative of sending the http line is made by the PLC himself.

So there is no request from the outside for the info.

regards

laantje