I am successfully running this on Home Assistant Blue for a couple of weeks now. I purchased the M871A-USB - Wireless M-Bus USB-adapter 868 MHz from IMST (good for EU, because they are in Germany). Installed wmbusmeters as HA add-on by adding the repository according to the instructions here. The USB radio was discovered automatically by the add-on and it soon discovered my meters in the Log tab. Then it was just a matter of adding them in the wmbusmeters config like this:  name=ColdWater driver...
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