I will start a project concerning remote restart of equipment.
I have already finished the control of temperature and the level of liquid of a tank, and everything is well.
I have already created a database and the values of my sensors are stocked without brobleme
My web page displays the values correctly.
Now I want to add 4 relays on my arduino ethernet card to restart 4 equipment via my web page by clicking on my restart button.
Has your opinion how I can perform this step
Use a relay shield between the Ethernet card and the Arduino (Uno?)
http://www.crossroadsfencing.com/BobuinoRev17/
Is your web server running on the Arduino?
no i use mysql database to save data
The database and web server are two different things, although the operating system distribution that you are using may give the illusion that they are the same thing.
If you have the memory you could run a secondary web server on the Arduino that presents a minimal user interface that allows you to control a relay board directly.
You could make my arduino shield a client and server At the same time ??
