I experimented with several HC-SR04 using a very simple scetch with Arduino 1.8.5, reading the measurements on the serial monitor. For a static setup I fastened the HC-SR04 in a vice and had it point against a white wall, inside a dust free room. No matter which distance between the wall and the sensor adjusted, the readings kept on being more or less constant BUT all of a sudden for a few readings the values decreased to almost zero and then continued with the expected measurement.
Does anybody have an explaination for this phenomena?
Thanks for your assistance in advance.
Posts made by sunnyboy69
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Distance Sensor HC-SR04: Incorrect measurement