How the shelf is picked

The shelf is short on purpose. An item is here because a recipe needs one, it works locally with Home Assistant, and its maker publishes a spec sheet to check it against.

The rules

1. Specs come from the maker. Every number on an item was read on 2026-10-27 from the maker's own product page, spec page, manual or warranty, and the item lists each one. Nothing comes from a review or a store listing.
2. What the maker does not say stays blank. A spec the maker does not state is printed as not stated, never filled in.
3. Disagreements are shown. When two of the maker's own pages disagree, the item says so, and the spec prints the more cautious figure.
4. The guides stay brand-free. Every page outside /shop on sensor.house names no brand and links here by what a step needs, never by product.
5. No prices. They change, so the shelf links out instead of printing a number that will be wrong.
6. No paid placement. No maker has paid to be here or to be described a certain way.

The links

Every store link on this shelf goes to the maker's own page unless a note beside it says it is an affiliate link. The guides on sensor.house name no brand; only these shelf pages do. No maker pays for placement. If a link can earn, the words a program requires print beside it and the page says so above the first one.

Corrections

If a maker changes a spec, or a spec here is wrong, the item is corrected and the change is recorded. See Corrections.