hi guys , i have a project , i need implementing this project by use "raspberry" .
idea the project about sending command to many "raspberry" from main site "raspberry" to control like relays ...etc , and recivering data from clients to main "raspberry" , over using ethernet cable (TCP/IP OR UDP/IP) ,
how can using the web server (GUI interface ) (main site ) "raspberry" to sending the command , without conflict and receiver data live to web server and show it .
there is no problem with html css javaciript .....and php my sql
how can send/recive data from php to clients over Ethernet