web control server without page refreshing ?

Forum 2005-2010 (read only) Software Syntax & Programs
1

I have made a web control server using Ethernet Sheild and the very good Google Code Archive - Long-term storage for Google Code Project Hosting. webduino . IT works fine ive got form buttons that will turn outputs on and off such as an led ect.

When i press a html button in the webpage it does a form submit and the page reloads on every button press.

Is there a method of controlling a output without having to reload the webpage after every button press ?

like if you want to control a servo motor you wouldnt want to wait for the page to refresh everytime .

any ideas ?

Any help would be great.

Thanks
Luke

2

Instead of load the entire page again, just open the link into the iframe.

3

Hey bld

thanks for your quick reply .

...thats a very good plan !

im not the best with html :frowning:

This is how i do now ..

ON OFF

so how would i do that in a i frame ?

cheers
luke

4

How about using javascript to do an ajax post?

Here is more information on that:
http://www.w3schools.com/ajax/default.asp

in the sample on :
http://www.w3schools.com/ajax/tryit.asp?filename=tryajax_first

you could replace this line:

xmlhttp.open("GET","ajax_info.txt",true);

with something like:

xmlhttp.open("GET","/servocontrol.htm?servo=1&position=15",true);

The sample from the site works with a button press, but you can assign it to fire when a textbox changes, or a slider moves, or mouse moves on the page, if you want.

There still will be some latency, but less than a full page reload.

5

OK just to say i done it using a iframe , it works fine.
Thanks for the help.

for anyone whos intrested this how you submit into an i frame.

ON OFF

Tip... use the www.w3schools.com try it editor to test html code , makes life easier !

Thanks also spinlock ! , i will have a look into an ajax method when i got time but for the moment using a iframe was a simple fix .

cheers
Luke