schie
/ hc-sr04.ino
Created
December 4, 2015 02:09
— forked from flakas/hc-sr04.ino
Modified Arduino Ping))) example to work with 4-Pin HC-SR04 Ultrasonic Sensor Distance Measuring Module
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| /* HC-SR04 Sensor | |
| https://www.dealextreme.com/p/hc-sr04-ultrasonic-sensor-distance-measuring-module-133696 | |
| This sketch reads a HC-SR04 ultrasonic rangefinder and returns the | |
| distance to the closest object in range. To do this, it sends a pulse | |
| to the sensor to initiate a reading, then listens for a pulse | |
| to return. The length of the returning pulse is proportional to | |
| the distance of the object from the sensor. | |
| The circuit: |