Merge pull request #13 from Hello1024/patch-1

Yield while stepper motor is stepping

Author: aentinger

src/Stepper.cpp

@@ -222,6 +222,8 @@ void Stepper::step(int steps_to_move)
         stepMotor(this->step_number % 10);
       else
         stepMotor(this->step_number % 4);
+    } else {
+      yield();
     }
   }
 }