Solved.

The problem was Jessie. Went back to Wheezy and the RaZberry works as advertised.
I presume the guide needs to be revised for Jessie, but I'm no Linux expert.

I have been using Domoticz on a Raspberry Pi 2 with an Aeon Labs Z-Wave USB Stick for some months with no problems. I was hoping to create a new controller using a Raspberry PI Zero and a RaZberry Z-Wave Controller. I followed this guide “Using Domoticz with the RaZberry Z-Wave Controller” http://w ...

You can only do that if your telnet session is 'root' itself.... OK, Doume, now I'm out of my depth. Login to the command line with username "root" and password the same as your administrator account then try doing the chmod That's it! RFXCOM and Z-wave both working now! Thank you so much :-)

Doume wrote:You can only do that if your telnet session is 'root' itself....

OK, Doume, now I'm out of my depth.

Apparently not

DiskStation> chmod 777 /dev/ttyUSB1
chmod: /dev/ttyUSB1: Operation not permitted

Also installed from github and 2.0.2362 is working here on a DS413 qoriq 5.1. RFCXOM is fine, but having problems with USB permissions for a Z-Wave stick, the Domiticz log file includes this: Error, ERROR: Cannot open serial port /dev/ttyUSB1. Error code 13 I can just about find my way around with ...