[chbot] PDL home automation

[Mark Atherton]

Thanks Mike.

A quick search reveals(?) :

Protocol is C-Bus, using CAT5 for the physical layer.

A catalogue is here 
https://arc.net.nz/wp-content/uploads/2016/08/C-Bus-Product-Guide.pdf

Some protocol details http://cbus.readthedocs.io/en/latest/ and 
associated library https://github.com/micolous/cbus

For those who prefer PDFs 
https://media.readthedocs.org/pdf/cbus/latest/cbus.pdf

-Mark