Raise a more useful error message if the Melcor controller is not connected.
-rw-r--r-- 6 .gitignore
-rw-r--r-- 35147 COPYING
-rw-r--r-- 5246 README
drwxr-xr-x - examples
drwxr-xr-x - pypid
-rw-r--r-- 1126 setup.py