CCU825 (and compatible) controller protocol driver

Here is what is it: http://www.radsel.ru/products/ccu825.html (in Russian).

How to use this driver.

To use this driver you need an encryption key for your devices.

Driver code requests keys from ICCU825KeyRing class. If you use just one device, ConstantKeyRing class can be used as a key provider. For multi-device project use ArrayKeyRing with all the required keys added. The keys themselves are to be asked from RadsEl tech support. Don't forget to provide your devices IMEI to get a key.

Next thing driver needs is a low-level ModBus transport implementation. We provide a connector to a j2mod ModBus library (j2mod-1.03.jar), which is available as CCU825_j2mod_connector class. You can use it or provide your own ModBus protocol driver.

Main entry point is CCU825Connection class. Create instance, providing, as said above, keyring and ModBus connector.

Call connect() to establish communication, and if protocolRC.isOk() - you can go on with communications.

Call getSysInfo(), getEvents(), setOutState(), getOutState().

Call disconnect() when done. If communications fail a lot - try to resync with connect() again.

MQTT/UDP or OpenHAB

This code supports two backends, one sends data to OpenHAB, other - to MQTT/UDP network.

Select one you like in CCU825Main.java line 65:

    //push = new PushOpenHAB("http://smart.local"); // OpenHAB host name
    push = new PushMqttUdp();

To find out what MQTT/UDP is, please, visit https://github.com/dzavalishin/mqtt_udp and https://mqtt-udp.readthedocs.io/en/latest/.

How to fix j2mod library

j2mod 1.03 has a bug in serial RTU close method, class ModbusRTUTransport, which prevents serial poprt from being reopened.

Corect code is here:

public void close() throws IOException {
	m_InputStream.close();
	m_OutputStream.close();
	
	m_CommPort.close();
}