I'm really at a loss to explain this. I just downloaded the python script again (on my Apple Mac), saved it with a different filename (HS110.py), and copied it across to my Raspberry Pi that runs Domoticz. I changed the 'on' and 'off' commands to pick up the new filename, clicked on the dummy ...

Did you ever found the solution? I have exactly the same problem. Strange thing is: I created a Domoticz environment on a Windows computer. The script did id not work with python 2.7.4 but works fine with python 3.4 (I have modified the script for python3). However, if I run python3 on the raspberry ...