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Compile program files

gcc -o rgb_temp rgb_temp.c -lwiringPi

Invoke gcc compiler. -o means to generate files, and will be followed by the name of generated

file. rgb_temp.c is source program, and -lwiringPi means to use the wiringPi library in Raspberry

Pi.

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Run the progam

./rgb_temp

The terminal prints out the current CPU temperature, and the RGB LEDs changes its color with

the CPU temperature.

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Codes Analysis