2020-12-02 Update: ------------------ The local utility has replaced my electricity-meter, so I no longer have any Kamstrup devices to test against. I would really appreciate if somebody else could take over this project. Thanks, Poul-Henning This is an implementation of the Kamstrup Meter Protocol (KMP) based on reverse engineering of a traffic dump. There is very little information about this protocol on the net, and despite calling it an "open protocol", Kamstrup has not wanted to release the documentation for it to me. Thanks to Erik Jensen for details about units and exponents. Tested on a Kamstrup 382J electricity-meter using a home-built optical head. Enjoy, Poul-Henning PS: Sample output: Energy in 6753.0 kWh Energy out 0.0 kWh Energy in hi-res 6753.3242 kWh Energy out hi-res 0.0 kWh Voltage p1 229.0 V Voltage p2 227.0 V Voltage p3 229.0 V Current p1 5.41 A Current p2 2.12 A Current p3 3.07 A Power p1 0.976 kW Power p2 0.475 kW Power p3 0.595 kW