How to use a Raspberry Pi for reading a Kamstrup Omnipower Electricity Meter

Realising that the documentation for the different components and packages is very I have made this brief summary of how I managed to pick up readings from my Omnipower Meter with a Raspberry Pi.

For me the interesting electricity data is Meter status (as seen on the display) and actual total power consumption and consumption for each phase.

I prefer to extract the data as readable raw data so it can be used directly by other applications. Then data can simply be shared with other devices and web services over UDP or as plain csv files etc.