Very interesting . I too am trying to get data from my esbox for a Graphana, home assistant type stuff.

I trawled the net a while ago and from memory somebody had some python to do it. But I cannot find it again.

Also found these guys that have a virtual esbox. The company has changed hands but cant hurt to ask.

https://www.c4forums.com/forums/topic/20139-chowmain-saturn-south-zigbee-power-meter-driver-for-control4.

Posting here in the hope somebody else can help too :-)