Error "WiServer" was not declared in this scope"

Projects Programming
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Hey All,

I am Aditya Sharma,a Final Year Engineering student and a beginner in Arduino.Actually,I want to design a water tank depth sensor for a college project.I searched for the same idea on the Internet and got good results.I downloaded the source code from a website and also got an Arduino for the project but while compiling the program I got an error {'WiServer' was not declared in this scope}.Can any one tell me what is this error due to?I have pasted the link below from where I got the source code.I copied and pasted the source code directly,is there any issue with that?Also I am unable to mount my Arduino UNO to my computer.So please help me in this regard and oblige.

Source Code: WaterTankDepthSensor/WaterTankDepthSensor.pde at master · practicalarduino/WaterTankDepthSensor · GitHub

Project Idea and details: http://www.practicalarduino.com/projects/water-tank-depth-sensor

Warm Regards
Aditya Sharma

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I downloaded the source code from a website and also got an Arduino for the project but while compiling the program I got an error {'WiServer' was not declared in this scope}

Was that the ONLY error you got? It seems unlikely.

Also I am unable to mount my Arduino UNO to my computer.So please help me in this regard and oblige.

Maybe use some duct tape? What do you mean by "mount the Arduino"? On what operating system? What happens when you try to "mount the Arduino"?

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#include <WiServer.h>

Have you got the WiServer library installed correctly?