Fuzzy Control DC Fan with L298N Arduino

I have project to control temperature with 12 V fans by using fuzzy control method with L298N. But I get problem, if the DC Fan getting started, the data I printed on Serial Monitor Arduino is stucked and it is not looping or read a temperature more. Can anyone help me to solve this problem?
This is for the source code

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Please edit your post and add triple backticks ( ``` ) before and after your whole sketch.

With the backticks in place, it’s very obvious that this has nothing to do with Blynk! :grinning:

@evisyulian You need to find a more general support forum. Try: