Use MQTT to get instant updates

[ndfred]

This component uses HTTP polling through Async to update values, using MQTT instead would provide more up to date information

[ndfred]

I've been digging and dumped some MQTT connection and parsing code here. We can basically get all the data we need in real time, without worrying about tokens, which I think is a better fit for this component. Next I'll try and see if I can just get away with Home Assistant templates.

[ndfred]

I've continued my research and now have MQTT bridging and templates working! I now gather instant electricity consumption, as well as daily / weekly / monthly electricity and gas consumption and meter readings, in real time. Maybe this is what the HA component should be doing: just maintain an MQTT connection and present the data in a few nice sensors.