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Topic: control dc motor via ultrasonic distance module and L298 motor driver (Read 4746 times) previous topic - next topic


Someone PLease Help
It says duration is unspecified for the code above


It's defined as a local variable in the loop()
void loop() {
// and the distance result in centimeters:
long duration, cm;   // <==== HERE
pinMode(trigPin, OUTPUT);

Post YOUR code using code tags.
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