In 2013 I’ve released a small tool called EnOceanSpy on github. This tool can be used on a Raspberry Pi (RasPi) to log all incoming EnOcean telegrams and was implemented in C. The following photography describes the composition of Raspberry Pi, EnOcean USB300 stick (and a WakaWaka as a portable power bank):

Raspberry Pi with EnOcean USB300

The post at that time described the usage of this composition.

Now I’ve release a Java implementation of EnOceanSpy also on github: https://github.com/hfunke/org.protocolbench.enoceanspy. This tool logs all incoming EnOcean telegrams as well, but this time in Java. You can set the used <com port name at> the command line and EnOceanSpy logs all incoming telegrams.

And here is a Java code snippet where you can find a way to connect the USB300 stick with RXTX:

    void connect(String portName) throws Exception {
        CommPortIdentifier portIdentifier = CommPortIdentifier
                .getPortIdentifier(portName);
        if (portIdentifier.isCurrentlyOwned()) {
            System.err.println("Port is currently in use!");
        } else {
            CommPort commPort = portIdentifier.open(this.getClass().getName(),
                    3000);

            if (commPort instanceof SerialPort) {
                serialPort = (SerialPort) commPort;

                // settings for EnOcean:
                serialPort.setSerialPortParams(57600, SerialPort.DATABITS_8,
                        SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);

                InputStream in = serialPort.getInputStream();
            
                serialPort.addEventListener(new SerialReader(in));
                serialPort.notifyOnDataAvailable(true);
                
            } else {
                System.err.println("Only serial ports are handled!");
            }
        }
    }

EnOcean allows on the one hand one-way and on the other hand bidirectional communication between devices. Currently most of this communication is not decrypted, so you can read all information communicated via air. There is a first specification to use cryptography for EnOcean protocol. I will give you an overview on this way of encryption in the next time.

Have fun to seek your environment after EnOcean devices :)