Obtaining AES key

[henrykuijpers]

I just purchased 2 Kamstrup Multical 21 water meters (1x hot, 1x cold). I was expecting a little document (or something) in the package, that would contain the AES key. However, I don't see any mention of an encryption key and/or any code.

Maybe my Danish isn't good enough, but I'm at a bit of a loss here.

I see other people contacting their water providers for the key, however, our water provider still installs dumb water meters (in fact, I still have their dumb water meter installed and I'm not going to replace it), the water meters I bought are for monitoring a heat pump boiler.

Can anyone clarify their way of obtaining the AES key? Do I send an e-mail to the supplier of the water meters? Or to Kamstrup? Or is there another way?