How can I change variables over network.... from web page form?

Projects Networking, Protocols, and Devices
1

Hi,

I'm quite new to Arduino (and learning slowly) and planning a project at this moment. It is to control the humidity in a glazing system. The task is to monitor 8 sensors and switch on 1 of 8 pumps when the right humidity condition has been met. So far I've got 8 inputs (from the sensors) and 8 outputs (to the pumps); I'll probably add a simple LCD display (one of those 16 x 2 ones) and link it all in to my home network.

I've ordered a Mega and Ethernet shield, which should arrive shortly.

I'm trying to work out if it is possible to alter the humidity threshold point over my home network from say a web page form or similar. Not sure how this should be done, do I need to save a web page on the SD card and store the humidity threshold points as variables and then call them from the Arduino sketch? Presumably there is a better way of doing this or a tutorial on this sort of thing?

Any advice much appreciated.

Cheers

Ron

2

You can enter data in a web page text box, send it to the arduino server, then save the data as a variable to be used in some fashion.

3

Hi and thanks,

Forgive me for being a bit thick but I plan to have the Arduino on a timer so that it switches on in the morning and switches off overnight. Will the variable I set via the web page be stored so that after switching everything off and on again it is still there?

Cheers

Ron

4

You could save it in EEPROM and read it back each time the Arduino starts up.

Are you new to using the Ethernet card? I'm looking for the address of a tutorial I used, I'll post if I find it.

Or maybe zoomkat has a bit of code in his seemingly infinite library of awesome goodies....

EDIT... have a look at this tutorial

5

Hi,

Errr....the the Ethernet card is still on its way in the post to me....so very very new to it.

I've tried to find a tutorial but without any luck, so if you know of one please post the link...but I think I also need another tutorial on how to find a tutorial out in the infinity!

Cheers

Ron

6

Here it is

7

Hi,

Thanks,

It'll take a bit of time to work through but I think it's probably got what I want in it somewhere.

Cheers

Ron