Helper not started (did you call connect()?)

[rlust]

How do I start the helper?

[zelig2]

Have you done all the prerequisites of determining your bluetooth address? What command did you run?
This is what I run (with my personal MAC address) and it will show me the current output.
python /data/radonreader/radon_reader.py -a XX:XX:XX:XX:XX:XX -v