If anyone is interested I have finally cobbled together a device type handler for the Fibaro Dimmer 211 which includes the ability to change the parameters. I have struggled trying to change parameters on this unit and could not find any code that actually worked. So I set about creating something that would.
It’s not the most elegant solution but it works (for me anyway, you use at your own risk of course), but once you have the parameters set up exactly as you want them you can revert back to your previous DTH if you prefer as the 211 unit should retain it’s settings.
A Word of Warning
If you change parameter 14 to 1 i.e. Toggle Switch as I did you may find the actual switch stops working after a short while. I read somewhere that this was an issue with the 211 unit and that a solution was to change Parameter 10 to 0. which I did and it seems to have solved the problem.
Here is the link to my Github repository https://github.com/inpier/Fibaro-Dimmer-211.git)
The read me file has some help for installing the DTH for those who need it.
The code incudes the instruction for changing parameters.
Hope it works for you.