[RESOLVED] Very INSANE Problem

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hi .. first m sorry bad english.. , plz try ignore // comments program .. tired delete them  :d

i want play starwars whit piezo speaker during robot avoids obstacles... failed because when starwars playing robot continues go forward ultrasonic sensor doesnt detects anything...

i attached file topic because large write there...


                                                                                                         thx !!


it may not cause of problem using tone() function prevents use of pwm on pins 3 , 11 , program uses both pwm.

how know sensor not detect ?


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