Package com.diozero.devices.sandpit

Class HCSR04UsingWait

java.lang.Object
com.diozero.devices.sandpit.HCSR04UsingWait
All Implemented Interfaces:
DistanceSensorInterface, SensorInterface, java.io.Closeable, java.lang.AutoCloseable
public class HCSR04UsingWait
extends java.lang.Object
implements DistanceSensorInterface
User's manual: https://docs.google.com/document/d/1Y-yZnNhMYy7rwhAgyL_pfa39RsB-x2qR4vP8saG73rE/edit# Product specification: http://www.micropik.com/PDF/HCSR04.pdf Provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm You only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo. The Echo is a distance object that is pulse width and the range in proportion. We suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal

  • Constructor Summary

    Constructors 
    Constructor Description
    HCSR04UsingWait​(int triggerGpioNum, int echoGpioNum)
    Initialise GPIO to echo and trigger pins

  • Method Summary

    Modifier and Type Method Description
    void close()
    Free device GPIOs
    float getDistanceCm()
    Send a pulse to HCSR04 and compute the echo to obtain distance
    static void main​(java.lang.String[] args)  

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • HCSR04UsingWait

      public HCSR04UsingWait​(int triggerGpioNum, int echoGpioNum) throws RuntimeIOException
      Initialise GPIO to echo and trigger pins
      Parameters:
      triggerGpioNum - GPIO connected to the HC-SR04 trigger pin
      echoGpioNum - GPIO connected to the HC-SR04 echo pin
      Throws:
      RuntimeIOException - if an I/O error occurs

  • Method Details