Hi,
For a couple of years now, i use a NodeMCU and ESPHome for reading P1 on my DSMR and feeding the data wirelessly into Home Assistant. The circuit is simplicity itself, using a NodeMCU and only one transistor. This method however, is not compatible with your new “Energy” menu item. Is it possible to integrate this ESP-method? Thank you!
Schematics, docs and YAML-file for ESPHome are stored in a zip-file on my website
Feel free to use this however you want. would be nice to see an article about this, because it’s really simple to build. 
It would probably work out-of-the-box if you added the proper device_class and state_class to your esphome sensors 
If you don’t know which to use, just do a search on the forum.
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Correct, you need device_class: “total_increasing” in your esphome sensors.
You might also want to add some throttle filter, or your DB will fill up quite fast. (DSMRv5 does an update every second)
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Ah that is great news. Thank you!