Hi,
I got me a Gossen-Metrawatt Metrahit Ultra BT and began working on a Python extension to communicate with this device.
For anyone interested:
https://sourceforge.net/projects/metrahit/The advantage is that the user gets all the data in usable formats and doesn't have to fiddle around with diverging raw text output of the device.
The extension could be used for data logging or for implementing test protocols.
It's only tested with bluetooth connection under Linux and Python 2.6, but should also work with the serial cable and under Windows and newer Python versions.
There's no official release yet, but the Git repository contains the first import which allows to get/set arbitrary informations, read out stored values, read values on demand and receive sent values.
It's not feature complete yet and lacks documentation, but shows where it's going.
Hope this helps someone and I'm open for discussion, improvements, ideas etc.