Arduino code - switch statement

Hi, I code a program for my autonomous robot. I am sending numbers from 0 to 8 from Raspberry pi to Arduino through Serial communication. I have Rasp code. But arduino code has some problems. Please can you tell me how to write it best? I want to use switch statement to choose direction for my robot/motors. But when I compile that code to arduino on robot - my robot start doing only default commands. Please why????

 

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[original story: Let's Make Robots]

Let's Make Robots 29 Dec 23:39
arduino  code  programming  switch