The GET request is very important. It follow some syntax.
And you have to give proper delay.
If you have any code is send to my mail id: vinothkumar.s1994@gmail.com.
Just try this.
Before you have to start the server.
Make the website or by using WIRESHARK connect with the PC.
GET /iot/server/uadatewaterlevel.php?res={\"val\":\"6666\"} HTTP/1.1\r\n.