Comments (1)
I do not think that it is practically possible to extract the key. However I know for sure that a user has successfully used wmbusmeters to query the mbus dongle to get the meter readings. You need an mbus master that can supply enough power though since the dongle pulls a bit more energy from the m-bus than a normal meter.
Lasse did write a short text describing how to do this, which I have attached. Thanks Lasse!
I is meant to go to the wiki eventually.
Kamstrup_wmbus_to_mbus_dongle.pdf
from wmbusmeters.
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from wmbusmeters.