I'm here because I couldn't find any answer anywhere and the problem seems pretty easy and hard in a same time.
I have a website, for exemple : My_website.host.fr I have arduino's sensors at home, for exemple temperature sensor in my garage, servomotor in shutter, etc... with Wifi-module.
I want to, as a User, access the website, update some information on the website, for exemple : I want the shutter down, so I put it to 0 on the website, and the arduino will, for exemple each X seconds check if the value has changed, if it does then it updates itself and so lower the shutter.
So, by this, i'll never have to connect directly through an @ip to my arduino, without hosting a server at home which could be hacked or anything, the arduino update itself with the infos that are on the website,
So from my arduino I must ? I have no idea, get the source code of the web page and search for some value, or, from the web page, update a file with PHP variables and retrieve that file with my arduino then read it for the values ?
I don't know if it's clear tho and I have no idea how to manage it.
Sorry about the bad english sentence or words, not main language;
Thank for the help i'm kind of lost.