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I have a gas meter that I am reading through rtlamr2mqtt that I am trying to add to the Energy dashboard, but it does not show up in the dropdown. I have checked the FAQ and it seems like my sensor is setup correctly... any ideas?
https://www.home-assistant.io/docs/energy/faq/#troubleshooting-missing-entities
Strange! Nothing jumps out at me as being an obvious problem with your setup. I'm doing something similar, though instead of rtlamr2mqtt (which I didn't know about) I have a bash script run via cron that parses rtlamr output via jq and pipes that to mqtt (mosquitto), but there's very little to it. I know the energy dashboard setup is picky about the energy recording entities.
Mine looks like:
state_class: total_increasing
unit_of_measurement: ft³
device_class: gas
friendly_name: Gas Meter
The name of the entity is sensor.gas_meter and the state is currently 113812 as an example.
Might be worth reading through GitHub issues for rtlamr2mqtt, including closed ones, if you haven't already. Or maybe a hass restart? Can't think of anything else.