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Good morning, my name is Marco, congratulations for the fantastic site !!!

I am a self-made hobbyist for curiosity

I wanted to try the pid controller (http://electronoobs.com/eng_arduino_tut24_2.php)

unfortunately, I can not understand why in the compilation phase, IDE gives me this error

Arduino: 1.8.7 (Windows Store (Windows 10), Card: "Arduino / Genuino Uno"

sketch_sep15a: 52: 7: error: redefinition of 'float last_kp'

 float last_kp = 0;

sincerely greetings I hope to solve
in Arduino by (130 points)

2 Answers

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Sorry, there was a small bug in the code. Try now: http://electronoobs.com/eng_arduino_tut24_code3.php
by (34.8k points)
thank you! I managed to flash arduino without compilation errors, now I recover the necessary components that I miss. very professional
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by (860 points)