PreonVM

<h2 id="code-example">Code example</h2>
<p>The following code examples uses an SHT21 sensor and reads the relative humidity.
</p>
public class SHT21Demo { 
    public static void main(String[] args) {

// sensor is connected to I2C bus instance 1
        NativeI2C i2c = NativeI2C.getInstance(1);
        i2c.open();

// create and init SHT21 sensor instance
        SHT21 sht21 = new SHT21(i2c);
        sht21.setResolution(SHT21.RESOLUTION_RH12_T14);
        sht21.reset();

// read and print humidity every second
        while (true) {
            sht21.startRelativeHumidityConversion();
            Thread.sleep(100);

int rawRH = sht21.getRelativeHumidityRaw();
            float rh = SHT21.convertRawRHToRHw(rawRH);

System.out.println("SHT21: rawRH=" + rawRH + "; RH=" + rh);
            Thread.sleep(900);
        }
    } 
}

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/List_of_Java_virtual_machines/PKkGAzDx">List of Java virtual machines</a></li></ul>
<h2 id="external-links">External links</h2>
<ul><li><a href="https://www.virtenio.com/en/portfolio-items/preonvm/">PreonVM site</a></li>
<li><a href="https://books.google.com/books?id=ExGwDwAAQBAJ&dq=%22PreonVM%22&pg=PA187">Handbook of Industry 4.0 and SMART Systems</a> - mentions the PreonVM as OS for <a href="/facts/WSN/r5LIAVsU">WSN</a></li>
<li><a href="http://www.intelligentcontainer.com/en/project-results/sensornetze.html">Intelligent container</a> - uses PreonVM operated radio module</li>
<li><a href="https://books.google.com/books?id=DYRlDwAAQBAJ&dq=Virtenio+Java&pg=PA16">Synchronous data acquisition with wireless sensor networks</a> - mentions the PreonVM as option</li>
<li><a href="https://www.research-collection.ethz.ch/bitstream/handle/20.500.11850/99071/eth-47460-02.pdf">Scalable Web Technology for the Internet of Things</a> -  mentions the PreonVM to run the CoAP framework</li></ul>

PreonVM open-in-new

PreonVM