I know nothing about Home Assistant, but a video introduction to feeding heat pump data into emonCMS was published here recently: Vaillant eBUS hardware adapter (ebusd software) Thread - #413 by sparky77 Assuming you have data appearing as Inputs, the useful part for you (i.e. emonCMS itself) starts at 14’30".
Have you actually looked in the Docs section? It’s been expanded recently and there’s a lot about using emonCMS by itself. emonCMS user guide — OpenEnergyMonitor 0.0.1 documentation If you’re not sure about the component parts of emonCMS, the starting point is probably the 3rd ‘chapter’: Emoncms Core Concepts — OpenEnergyMonitor 0.0.1 documentation and then go back to the beginning and how to set it up.
I did send the following to another recent plea for very basic information, but there’s been no response
Collecting your data
This task is handled in the emonPi or emonBase by emonCMS, working hand-in-hand with emonHub.
Data arriving via the LAN is received directly by emonCMS and appears on the Inputs Page. Serial data received either by ISM band radio from an emonTx or emonTH, or by USB from an electricity or heat meter, inverter etc is received and reformatted by emonHub and then transferred to emonCMS, also appearing on the Inputs Page.
The Inputs page can process the data as it is received. Many operations can be performed, a few of the more common ones are scaling (calibrating) and adding other inputs, separating imported and exported power, accumulating powers to give energy totals. At any point, the value can be “logged to feed”. This is how the data is saved.
The Feeds page is the database in which your data is stored. There are two basic types: Fixed Interval Time Series and Variable Interval Time Series. The first is best suited to data that arrives at regular fixed intervals of time, like the voltage, power and energy from an emonTx, emonTH or the emonPi itself. The second should be used when the data arrives irregularly, say from a switch closing.
When the data has been saved in a Feed, it can be accessed and viewed as a Graph (the familiar sort), a Visualisation (also a ‘graph’ but various sorts, one is animated) or various graphs, numbers and dials can be assembled on a Dashboard. The specialised Apps (My Solar, My Heatpump, etc) can be thought of as pre-programmed dashboards.
Those are the basics of emonCMS. There is a lot more to it than this.