Just wanted to share a plugin I wrote thusfar (not my best work

Step 1: create a folder under the domoticz\plugins, called Plugwise. Another name will require a change in the python code.
Step 2: create a file "plugin.py" in this folder, containing the code below (in plugin.txt, as the form does not allow .py files).
Step 3: restart domoticz
Step 4: add hardware (Plugwise should be in the hardware list). Setup parameters....
- Devices should be added to the setup upon start of the plugin.
Step 5: add unused devices to the UI.
Note: In the plugin folder, a file is created 'devices.json'. This file contains the link between circle/sensor and unitid in domoticz. Do _not_ deleted (unused) devices in domoticz or this file if you do not know what you are doing as this will case a mismatch between plugwise/plugin/domoticz. Also, if debug is enabled, a log.txt file is created. As my experience is that when you make a mistake as a developer, domoticz UI is unresponsive and you cannot access the internal log.
Reset:
If you made a mess: delete the 'hardware', delete the devices.json and repeat from step 4.
This is provided as-is, feel free to use this as you please and extend on it. Do try to help the community and publish any improvements, please.