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Methodology

What counts as a source, what unknown means, and how dates, lines and links are shown

Answer

Every fact carries a source and the date it was checked. A fact with no source shows as unknown. It is never guessed. Every device, product line and platform page cites the pages its facts come from.

Sources

A source is a public page that anyone can open and check. Each one is listed with its type, its address and the date it was last read. The site uses these kinds of source:

Retailer pages are never a source. Marketing copy is summarized in the site's own words, never copied.

Images and credits

Product images come from makers' press kits, press releases and product pages, from Wikimedia Commons and from free photo libraries such as Unsplash. An image is used only when it shows the model it is attached to, as a single unit and not as packaging, a phone screen or a multi-pack. Images from a maker are shown unaltered apart from resizing. The credit under each image links to where it came from. Retailer and Amazon images are not used. A maker or photographer who wants an image taken down can ask, and it comes down.

Check dates

The check date is the day the source was read. It is not the day the product was released. The oldest check on any page is 2026-10-07 and the newest is 2026-10-20. A check older than 180 days is marked stale on the page. When a source is read again and still says the same thing, only the date changes.

What unknown means

When a value has no source, the cell reads unknown. The site never uses a blank, a dash or a plausible default instead. The at-a-glance box also says unknown when nothing sourced states whether a platform works. Unknown means the answer is not published. It does not mean no. A release date that is not published is left off the page.

No guessing from related models

A fact about one model is never filled in from another. A newer model in the same line, from the same brand, or with the same radio or chip, says nothing about this model. A platform supported on one connection says nothing about another. A page says a model was replaced only when a source says so.

Dates and their precision

Dates are shown as precisely as the source gives them: a day, a month, a quarter, a half or a year. A source that says "Q2 2024" becomes "2024-Q2", not a day. The release timeline lists every dated release event with its source. An expected release is listed only when the maker announced it. Rumours and leaks are not used.

Discontinued products and archived pages

A discontinued model can lose its manufacturer source when the maker removes the product page. The source is then the Internet Archive snapshot of the maker's own page, linked with the date the snapshot was read. If no snapshot or other source exists, the fact shows as unknown.

How a model's status is decided

A model has one of four statuses: current, upcoming, discontinued or unknown. A model the maker sells directly is current, unless the maker offers it only as clearance, outlet or refurbished stock. A sold-out model is still current. For makers that do not sell directly, a model on the maker's own product listing is current. Upcoming means the maker has announced the model but not yet released it. Discontinued needs a source that says so, such as the maker's end-of-sale notice or an archived product page. A model that is missing from every maker listing, with no notice, is unknown. Absence from a shop is never read as discontinued.

How product lines are shown

A product line is a family of similar models sold under one name. Each model has its own row on the line page, with its own model numbers, release date and facts, and every cell cites its source. When models differ only by size or length, they share one device page and keep separate rows on the line page. Discontinued models keep their row, with the source for that status, but get no page of their own.

A model is called the newest in its series only when its release date is known. The old-stock table says "Replaced by" only when the maker or another source names the successor. Otherwise it says "Newer model" and shows both release dates. A line with no stated discontinuation or newer model has no old-stock section.

A line page appears once it has at least 3 sourced models and a written answer. A device page needs a currently sold model with at least 10 sourced facts, one of them beyond what its line row shows, and an answer written for that model. A device or line that falls short has no page that search engines index.

How feature ladders are shown

A ladder is a grid that shows which tier of a lineup gets which feature. Each cell is yes, no, partial, varies or unknown, with a source. A model that departs from its tier is listed as an exception under the feature, with a note and its own source. A model-number decoder, where a source explains the code, has one cited row per code segment.

The at-a-glance box

The works-with box on a device page shows that device's own sourced platform facts. It shows a state, never a score. Yes means a source says the platform supports the device, natively or through an integration. No means a source says it does not. Anything else is unknown.

Home Assistant and Homey levels

A device can reach Home Assistant or Homey by more than one route, and each route has a level. The headline on tables and device pages is the device's best route. The order is the site's own: local before cloud, direct before bridged, core integrations before community ones. The Home Assistant levels, best first:

The Homey levels, best first:

The device page lists every route with more detail. For Home Assistant that is the integration's tier on Home Assistant's Integration Quality Scale, its IoT class, and whether the model is Works with Home Assistant certified. The tier grades the integration's code and setup, not the device, so it never changes the level. For Homey it is whether the app comes from a verified developer and whether the driver runs on Homey Pro, Homey Cloud or both. A route is marked Limited only when a source states a limitation for that device or route, and the stated reason is shown next to it.

Each route also says how closely its source names the device. Model named means the source names the model. Product line named means it names the series. Vendor system covered, model not named means the integration covers what the maker's hub or system adopts. A missing listing never makes a device not supported. That needs a source that says so. A forum post is never the source for a route. With no sourced route, the headline is unknown.

Every device with a manufacturer product page links to it. An Amazon link is a search for the brand and model. It is labelled as a search and shown with the disclosure line. A link goes straight to an Amazon product page only when that exact listing has been checked against the model, and the link says so. The site shows no Amazon prices, ratings, reviews or product images, and does not copy listing text. Discontinued models and accessories that are not sold on their own get no Amazon link. Retailer links do not change what an entry says. See the disclosure.

Corrections

When a fact is found to be wrong, or a claim goes beyond what its source says, the entry is changed to match the source. If the source does not support the claim, the value becomes unknown. Corrections to published entries are recorded on the change log with the date and the pages affected, and the log is also an RSS feed. Re-reading a source that still says the same thing changes only the check date.

Data licenses and credits

The Markdown versions of pages (see this page) include only facts the site can republish. Values that rest on press, community databases, certification ledgers, hands-on tests or non-commercial documentation appear in the HTML page only.

Community databases such as ESPHome Devices, Tasmota Templates, the Theengs decoder and the Homey app store are linked where useful but not copied. Each fact is checked against the product or the maker. Product names and trademarks belong to their owners. Facts are summarized in the site's own words from the maker's pages, each linked.

Includes facts derived from zigbee-herdsman-converters (the device definitions behind Zigbee2MQTT), Copyright (c) 2018 Koen Kanters, MIT License: license text.

Certification information comes from the Connectivity Standards Alliance Distributed Compliance Ledger and is shown with source links. Matter and Zigbee are trademarks of the Connectivity Standards Alliance. Nothing is copied from csa-iot.org.