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You have to declare Ftemp as a function near the top of the file (apologies if my terminology is wrong here, I'm a programming noob). I addedint Ftemp;after the line that hasint temp, rh ;near the top of the file under the section labeled "The main program".I had the same problem too.
Raspberry Pi Temperature & Humidity Network Monitor
CD Case Mural
Temperature sensor / weatherstation
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