Build log
Home Assistant deep-dives, card build logs, and automation write-ups.
TRVs report valve position, not demand. Here is how I built a sensor that aggregates per-room heat demand into something the boiler can act on.
The first rewrite fixed the layout. The second fixed time zones. Here is what I learned about building Lovelace cards that actually handle real calendar data.
Race status from a public API, piped through MQTT, mapped to Govee light effects. The lights go green on race start, safety-car yellow on VSC, and red on a red flag.
An 11×10 letter grid that shows the time in English. The challenge was making it fit any tile size without JavaScript-driven font sizing.
The HACS submission checklist is longer than it looks. Here is what caught me out and how to get through the review without back-and-forth.
Three concepts that beginners conflate and experts take for granted. Getting this mental model right makes everything else click.