MDT Support

[heavyweight87]

MDT tested with a Vailant heatpump

[DerAndereAndi]

Thanks a lot for this PR! The changes and additions look good so far. Would it be possible to get a SPINE trace log to see the communication in action? That would be the best source for me to evaluate the actual implementation.

Additionally I started adding comments to the New... methods in all usecases. Would be great if you could add that as well, see #136

[heavyweight87]

Sure ill try to get these for you
We actually now parse the trace logs and save the json payloads to a file so its easier to debug issues

Any thoughts about adding something like this to the lower comms level? A flag that can be set to allow saving rx/tx packets to a file for logging?

[DerAndereAndi]

I am not sure I understand your question. Could you elaborate a bit more on that please? (You can also join the Slack channel for such discussions, linked in the enbility.net contact page)

[heavyweight87]

A feature that would allow saving of the incoming and outgoing packets to a file, for later inspection. It would be great for debugging purposes especially as due to the encryption tcpdump is pretty useless

[DerAndereAndi]

That's imho already possible by implementing the logging interface and writing that output to a file. See https://github.com/enbility/eebus-go/blob/dev/examples/hems/main.go#L96 and https://github.com/enbility/eebus-go/blob/dev/examples/hems/main.go#L322-L368