Ethernet and RF error

Projects Networking, Protocols, and Devices
1

Hi,

I having do web control wifi thermostat.

Data is coming to Arduino air RF. but not convert from char* to String.
RF modul single running and Web modul single running.
But together not work.

for (int i=0; i < buflen; i++)
 {
c[i]=buf[i];
Serial.print(c[i]);

 } 

Serial.Ptintln("");

String gelen(c);

Serial.Ptintln(gelen);