Product Library / Thermostats

Research profile · last verified 2026-09-27

Honeywell Home X2S Smart Thermostat

Compiled by SmartHomeWorkflow Research · Honeywell Home (Resideo) · Thermostats · ~$79.99 (at time of research — never treated as a live price. Corrected 2026-08-08 from a rounded 80 to the published 79.99.)

Compatibility at a glance

Does it work with your platform?

Choose your platform to see its setup and functions. Your choice carries across product pages.

[8][21][27][29]
[9][21][26][27][29][30][32][35][36]
[7][21][26][27][32][39]
[10][25][29]
[4][29]

A connection can work while individual controls or automations remain unconfirmed. Read the connection details ↓

Protocols: WIFI · MATTER[2][3][14][22][24][31]

Before you buy

What do you need to make it work?

No hub for the device alone

Choose a platform above for its connection. A hub can be optional for the device itself and required for a platform or automation.

One device can provide more than one role. These are setup requirements, not a shopping list of separate purchases.

What could you do with this?

Put its functions to use.

Research, not hands-on testing

Start with a documented control or event. The selected connection shows what is confirmed for that platform.

Documented device function

Target temperature

The device supports this control.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [12] [21]

Documented device function

HVAC mode

The device supports this control.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [12] [21]

Documented device function

Temperature reading

The device reports this event.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [12] [21]

A documented control or event is one part of a setup. It does not by itself establish a complete automation.

The functions, side by side

What can you use, and where?[12][21]

A platform connection does not confirm every function. Controls and reported events are shown separately from what an automation can use.

Controls
2 documented
Reported events
1 documented

Compare all five platforms. On a narrow screen, scroll the table sideways.

Documented device functions, platform controls and automation availability
Device functionApple HomeWorks[8][21][27][29]Google HomeWorks[9][21][26][27][29][30][32][35][36]AlexaWorks[7][21][26][27][32][39]SmartThingsWorks[10][25][29]Home AssistantWorks[4][29]
Target temperatureDevice control
Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

? not stated

Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

—

HVAC modeDevice control
Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

? not stated

Control

Supported for this Matter device type

Automation

✓ routines can use it

Control

Supported for this Matter device type

Automation

—

Temperature readingReported event
Event

Supported for this Matter device type

Automation

✓ routines can use it

Event

Supported for this Matter device type

Automation

✓ routines can use it

Event

Supported for this Matter device type

Automation

? not stated

Event

Supported for this Matter device type

Automation

✓ routines can use it

Event

Not stated

Automation

—

✓ Documented for this connection. × A stated limit. ◐ A partial function. ? Not established. A listed device function does not establish a complete routine, its other equipment or any plan requirements.

Matter device-type support is based on the platform’s list for this kind of device; this exact model is not named.

Setup and sources

Apple Home

Matter only — no native HomeKit; an iPhone on iOS 18 or later can add and control it over Matter without a home hub, and a HomePod, HomePod mini or Apple TV is still needed to control it away from home, run automations and share control.[8][21][27][29]

Google Home

Google Home sets the temperature and switches heating and cooling modes through Matter, because Google lists thermostats among the Matter devices it supports. You need a Google Home hub that acts as a Matter controller. Resideo marks the X2S as Matter certified and names Google Assistant, but does not say how it connects to Google; its product page marks only Apple Home as working through Matter.[9][21][26][27][29][30][32][35][36]

Alexa

Works in Alexa over Matter: this model carries a Matter certificate, and Alexa controls Target temperature and HVAC mode on Matter thermostats. Resideo also lists Amazon Alexa among the platforms the X2S works with, without saying how it connects; its product page marks only Apple Home as working through Matter.[7][21][26][27][32][39]

SmartThings

SmartThings sets the temperature and switches heating and cooling modes through Matter, because Samsung lists thermostats among the Matter devices it supports. You need a SmartThings hub, either a standalone hub or one built into a recent Samsung TV or appliance. Resideo marks the X2S as Matter certified but does not name SmartThings.[10][25][29]

Home Assistant

Home Assistant sets the temperature and switches heating and cooling modes through its own Matter support, which runs on Home Assistant's free Matter Server app. Resideo marks the X2S as Matter certified but does not name Home Assistant.[4][29]

Platform documentation:

honeywellhome.com · checked 2026-10-04

Apple Home — Matter path · checked 2026-09-04

resideo.com · checked 2026-10-09

developers.home.google.com · checked 2026-10-10

csa-iot.org · checked 2026-10-10

Google Home — Matter path · checked 2026-10-03

honeywellhome.com · checked 2026-07-21

honeywellhome.com · checked 2026-09-27

csa-iot.org · checked 2026-10-11

Alexa — Matter path · checked 2026-09-04

partners.smartthings.com · checked 2026-09-27

SmartThings — Matter path · checked 2026-10-07

Apple Home — Matter path · checked 2026-10-03

SmartThings — Matter path · checked 2026-10-14

SmartThings — Matter path · checked 2026-10-14

SmartThings — Matter path · checked 2026-10-14

SmartThings — Matter path · checked 2026-10-14

Home Assistant — Matter path · checked 2026-10-04

Device documentation: [12] [21]

Listed device functions are established from vendor documentation. An ability missing here is unestablished, not necessarily absent.

Connection details and setup sources
EcosystemSupportThe catch
Amazon AlexaWorksWorks with this ecosystem[7][21][26][27][32][39]Works in Alexa over Matter: this model carries a Matter certificate, and Alexa controls Target temperature and HVAC mode on Matter thermostats. Resideo also lists Amazon Alexa among the platforms the X2S works with, without saying how it connects; its product page marks only Apple Home as working through Matter.In Amazon Alexa you also need: a Matter-capable Amazon Echo or eero device — Alexa’s rule for every Matter accessory. Source (read 2026-09-11)
Google HomeWorksWorks with this ecosystem[9][21][26][27][29][30][32][35][36]Google Home sets the temperature and switches heating and cooling modes through Matter, because Google lists thermostats among the Matter devices it supports. You need a Google Home hub that acts as a Matter controller. Resideo marks the X2S as Matter certified and names Google Assistant, but does not say how it connects to Google; its product page marks only Apple Home as working through Matter.In Google Home you also need: a hub for Google Home (a Nest speaker or display, Nest Wifi Pro, the Google TV Streamer, or a compatible TV) — Google Home’s rule for every Matter accessory. Source (read 2026-09-11)
Apple HomeWorksWorks with this ecosystem[8][21][27][29]Matter only — no native HomeKit; an iPhone on iOS 18 or later can add and control it over Matter without a home hub, and a HomePod, HomePod mini or Apple TV is still needed to control it away from home, run automations and share control.
SmartThingsWorksWorks with this ecosystem[10][25][29]SmartThings sets the temperature and switches heating and cooling modes through Matter, because Samsung lists thermostats among the Matter devices it supports. You need a SmartThings hub, either a standalone hub or one built into a recent Samsung TV or appliance. Resideo marks the X2S as Matter certified but does not name SmartThings.In SmartThings you also need: a Matter-compatible SmartThings hub — SmartThings’s rule for every Matter accessory. Source (read 2026-10-14)
Home AssistantWorksWorks with this ecosystem[4][29]Home Assistant sets the temperature and switches heating and cooling modes through its own Matter support, which runs on Home Assistant's free Matter Server app. Resideo marks the X2S as Matter certified but does not name Home Assistant.In Home Assistant you also need: Home Assistant's own Matter Server app, installed from inside Home Assistant (no extra hardware to buy) — Home Assistant’s rule for every Matter accessory. Source (read 2026-09-11)

Plans and ongoing costs[1][21][27]

✓ Works without a subscription: Yes.

Vendor account required: Not established — we have not sourced this yet.

No paid tier; schedules and away features run in the free First Alert app

Maintenance and offline use[5]

The catch

C-wire required, no room-sensor support at all (Resideo-confirmed), WPA2-only WiFi, and Matter exposes just temperature and mode — plus the launch-firmware Matter no-show is a trust wobble on this platform.

Who it's for

Budget buyers who want a basic Matter thermostat that answers to any ecosystem — the multi-platform alternative to the Alexa-only Amazon Smart Thermostat at the same price tier.

Check availability at Honeywell Home (Resideo)

This opens Honeywell Home (Resideo)'s own website. We earn nothing from this link.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

42 numbered sources· read them in the source's own words
  1. [1] Resideo honeywellhome.com X2S product page and the structured product data behind it (read 2026-08-08): available true, price 7999, single variant SKU/MPN RTH2CWF/U; the structured offer data gives availability InStock, price 79.99, seller Honeywell Home; 'C-wire required (24 VAC), WiFi 2.4 or 5GHz (802.11 b/g/n)'; 'control from anywhere using the First Alert by Resideo app - also compatible with Google Assistant, Apple Home*, and Amazon Alexa. *Matter Certified'; 'Warranty 2 Years'; live installation/user guide and Matter supplement PDFs; no subscription, plan or tier named anywhere; SmartThings named nowhere — Read on the maker's own site, verified 2026-08-08
    Backs: Product identity, Price, Subscription, Market availability, Service status, Research status
  2. [2] CSA certified-products registry, keyword search 'X2S' (read 2026-08-08): Resideo Technologies, Inc., 'FocusPro S200 / X2S Smart Thermostat' (Matter), certificates CSA260DDMAT49889-50, CSA260DEMAT49890-50, CSA260DFMAT49891-50, CSA260DGMAT49892-50, CSA260DHMAT49893-50, CSA260DCMAT49888-50, CSA2506EMAT44992-50, CSA2506FMAT44993-50, CSA25070MAT44994-50, CSA25071MAT44995-50, CSA25072MAT44996-50, CSA25073MAT44997-50. Transport Interface not exposed in the results view — Checked a certification register, verified 2026-08-08
    Backs: Protocols, Service status
  3. [3] CSA certified-products database: 'FocusPro S200 / X2S Smart Thermostat' CSA260DCMAT49888-50 (Matter 1.3, WiFi, cert 2026-02-03, firmware 2.0.4.0); launch-firmware Matter absence documented in HA community + press reviews — Checked a certification register, verified 2026-07-15
    Backs: Protocols
  4. [4] Home Assistant community thread on X2S: Matter pairing works, entities limited to temperature + HVAC mode, no humidity; WPA2-only report from same thread — Read published press coverage, verified 2026-07-15
    Backs: Home Assistant compatibility
  5. [5] No room-sensor support confirmed by Resideo via Reviewed.com; C-wire requirement on official product pages — Read on the maker's own site, verified 2026-07-15
    Backs: Works without the internet
  6. [6] Resideo newsroom CES 2025 announcement + honeywellstore.com/Home Depot product pages (SKU RTH2CWF; C-wire, dual-band specs) — Read on the maker's own site, verified 2026-07-15
    Backs: Product identity
  7. [7] Resideo official X2S product page (honeywellhome.com/products/x2s-smart-thermostat: Amazon Alexa in Works With with '*Matter Certified' footnote) + Resideo press release 2025-01-06 ('Compatible with Amazon Alexa, Google Home and Apple Home', Matter-enabled) + Amazon Alexa Matter docs (thermostats supported: 'Set temperature, query current temperature') — consistent with the temperature-and-mode-not-schedules catch — Read on the maker's own site, verified 2026-07-21
    Backs: Amazon Alexa compatibility
  8. [8] Resideo official X2S product page: Apple HomeKit in Works With explicitly marked '*Matter Certified' — Apple compatibility is via Matter, not native HomeKit, matching the Apple-Matter-controller-required catch — Read on the maker's own site, verified 2026-08-20
    Backs: Apple Home compatibility
  9. [9] Resideo press release 2025-01-06 (X2S Matter-enabled, 'Compatible with Amazon Alexa, Google Home and Apple Home') + X2S product page Works With section listing Google Assistant under the same Matter-certified block — basic control matches Matter thermostat scope — Read on the maker's own site, verified 2026-08-20
    Backs: Google Home compatibility
  10. [10] Resideo names only Alexa, Google Home, and Apple Home in both the X2S press release (2025-01-06) and the product page — SmartThings appears nowhere in the X2S materials, and Samsung materials do not name the X2S. SmartThings supports generic Matter thermostats (partners.smartthings.com/matter), but no primary source names this pairing, so the honest unknown stands; the failed resolution attempt is recorded here — Read on the maker's own site, verified 2026-07-21
    Backs: SmartThings compatibility
  11. [11] honeywellhome.com X2S product pages plus the cited CSA and SmartThings Matter listings, re-read 2026-08-18 — Read on the maker's own site, verified 2026-08-18
  12. [12] Matter-scoped evidence, all of it already established on this record and re-read 2026-08-20 against honeywellhome.com/products/x2s-smart-thermostat: Resideo lists Amazon Alexa, Google Assistant and Apple Home under Works With, each carrying the "*Matter Certified" footnote, and states "control from anywhere using the First Alert by Resideo app". The CSA certified-products registry carries "FocusPro S200 / X2S Smart Thermostat" (Matter 1.3, WiFi, certificate CSA260DCMAT49888-50, certified 2026-02-03). Amazon's Alexa Matter documentation scopes thermostats to "Set temperature, query current temperature", and Home Assistant community testing of the X2S over Matter reports entities limited to temperature and HVAC mode, with no humidity entity — the same limit this record's integration catches already publish. — Read on the maker's own site, verified 2026-08-20
    Backs: Capabilities
  13. [13] honeywellhome.com's X2S product page, read 2026-08-20: "Connect to WiFi and control from anywhere using the First Alert by Resideo app", and the platform line "also compatible with Google Assistant, Apple Home*, and Amazon Alexa" whose asterisk is footnoted "*Matter Certified". — Read on the maker's own site, verified 2026-08-20
    Backs: Required hub or bridge
  14. [14] This record's existing per-model Matter evidence, re-read 2026-08-20 against the settled definition of what counts as a protocol: certificate CSA260DDMAT49889 · the transport is not shown in the register's results view. No new outside page was opened — the evidence already on this record was re-examined and this entry states what it establishes., verified 2026-08-20
    Backs: Protocols
  15. [15] Three Resideo first-party surfaces, all read 2026-08-20 and none carrying a support period. (1) resideo.com/us/en/support/security/ publishes no defined support duration, no end-of-support policy and no per-model timeframe. (2) The Resideo responsible-disclosure page describes its Coordinated Vulnerability Disclosure process and PSIRT investigation, and commits to no timeline for patch availability and no duration of support. (3) Resideo's two published end-of-support announcements are the informative part: the legacy Wi-Fi Water Leak Detectors ended installation support because "The security certificates used by these devices have expired" and "the certificates cannot be updated", with devices not online as of January 12, 2026 no longer installable; and the Honeywell Home Smart Security Kit ended October 31, 2024 because a certificate "was created and maintained by Honeywell" and Honeywell chose not to renew it. — Read on the maker's own site, verified 2026-08-20
    Backs: Security-update support period
  16. [16] https://www.honeywellhome.com/products/x2s-smart-thermostat (read 2026-09-09): 'C-wire required (24 VAC), WiFi 2.4 or 5GHz (802.11 b/g/n)'. The band clause names both, so 2.4+5 rests on an enumeration; the power clause states the voltage and the required conductor, so low-voltage rests on the wiring spec rather than on the device class. — Read on the maker's own site, verified 2026-09-09
    Backs: Wi-Fi bands it can use, Power source
  17. [17] https://www.honeywellhome.com/products/x2s-smart-thermostat (read 2026-09-09) — the APP SUPPORT section links https://apps.apple.com/us/app/first-alert-by-resideo/id6457097692 and https://play.google.com/store/apps/details?id=com.resideo.firstalert. ⊕ Resideo points this product at its First Alert app while the sibling T9 page points at Resideo Smart Home; which app actually drives this thermostat was NOT established here and is not claimed. Only the platform enumeration is read. No third mobile platform is named. — Read on the maker's own site, verified 2026-09-09
    Backs: App platforms
  18. [18] csa-iot.org certified-product page for Resideo Technologies, Inc.'s FocusPro S200 / X2S Smart Thermostat, read 2026-09-16. The page gives family SKU TH2320WF4010, variant SKU RTH2CWF, firmware 2.0.4.0, hardware Rev A, certificate CSA260DFMAT49891-50, certified 2026-02-03, family FAM226247, product ID 0x1003 and vendor ID 0x131A; it offers a compliance document for download, answers yes on TIS/TRP testing, and gives Matter specification 1.3, Wi-Fi as the transport, primary device type 0x0301 and end product as the product type. The vendor and product IDs on that page are what this entry records, and the variant SKU the page prints, RTH2CWF, is this record's own SKU: Resideo's own published product data gives this model's SKU as RTH2CWF/U and this record's own earlier reading of the retail listings gives it as RTH2CWF, both already on this record. — Checked a certification register, verified 2026-09-16
    Backs: Certification and product IDs
  19. [19] this record's own lifecycle note as it stood before 2026-09-17 (no new external read): its wording was rewritten so it reads in plain language. No fact, date, source or value changed, and the earlier wording is kept on this record., verified 2026-09-17
  20. [20] Honeywell Home's own US store listing for the X2S Smart Thermostat, read 2026-09-18. The listing is titled "X2S Smart Thermostat", is sold by Honeywell Home, and names its versions by the same order codes this record already carries: RTH2CWF/U (X2S Smart Thermostat). — Read on the maker's own site, verified 2026-09-18
    Backs: Certification and product IDs
  21. [21] Resideo's own X2S product page, re-read in full 2026-09-22. Page title: 'X2S Smart Thermostat - Easy DIY Installation & Scheduling'. 'Honeywell Home X2S Smart Thermostat SKU: RTH2CWF/U', '$79.99 Unit price / Unavailable | In Stock', with a working Add to cart. 'manage your heating and cooling through your home WiFi using the First Alert app by Resideo, Amazon Alexa, Apple Home, or Google Assistant'; 'C-wire required (24 VAC), WiFi 2.4 or 5GHz (802.11 b/g/n)'; 'The UWP wall plate ensures easy installation and simplifies future upgrades, making it perfect for DIY home upgraders'; 'also compatible with Google Assistant, Apple Home*, and Amazon Alexa. *Matter Certified'; 'Warranty 2 Years Limited'. The Works With block lists Amazon Alexa, Google Assistant and Apple HomeKit. No plan, tier, trial or subscription is named anywhere on the page. — Read on the maker's own site, verified 2026-09-22
    Backs: Product identity, Price, Subscription, Market availability, Service status, Installation, Wi-Fi bands it can use, Power source, App platforms, Capabilities, Amazon Alexa compatibility, Apple Home compatibility, Google Home compatibility, Research status
  22. [22] The Connectivity Standards Alliance certified-products registry, re-queried 2026-09-22 for the keyword 'X2S' and read rendered, because the results are built in the browser and a plain read of the registry returns the search form alone. It returns twelve Matter certificates under 'RESIDEO' for 'FocusPro S200 / X2S Smart Thermostat': CSA2506EMAT44992, CSA2506FMAT44993, CSA25070MAT44994, CSA25071MAT44995, CSA25072MAT44996, CSA25073MAT44997, CSA260DCMAT49888, CSA260DDMAT49889, CSA260DEMAT49890, CSA260DFMAT49891, CSA260DGMAT49892 and CSA260DHMAT49893 — the same twelve, by number, that the 2026-08-08 reading recorded. The rendered search page's own fingerprint is 4ed21ca9cf3ef285ec979ff3e67a1cffee1e608298704a845bb067e73fe04b3a. — Checked a certification register, verified 2026-09-22
    Backs: Protocols, Service status
  23. [23] Honeywell Home's own store data for the X2S, read in full 2026-09-27 through tools/page-read.mjs. Verbatim fields: "title":"X2S Smart Thermostat", "vendor":"Honeywell Home", "price":7999, "available":true, a single variant with "sku":"RTH2CWF\/U" and "price":7999, with no compare-at price and no barcode. The description reads "This ENERGY STAR® certified WiFi thermostat features flexible scheduling and auto-away functionality." and "This replaces the RTH6580 WiFi 7-day Programmable Thermostat". — Read on the maker's own site, verified 2026-09-27
    Backs: Product identity, Price, Market availability, Certification and product IDs, Research status
  24. [24] The Connectivity Standards Alliance's certified-product page for Resideo Technologies, Inc.'s FocusPro S200 / X2S Smart Thermostat, read in full 2026-09-27 through tools/page-read.mjs. The page gives variant SKU RTH2CWF, firmware 2.0.4.0, hardware Rev A, certificate CSA260DFMAT49891-50, certified 2026-02-03, family FAM226247, product ID 0x1003, vendor ID 0x131A, Matter specification 1.3, Wi-Fi as the transport, primary device type 0x0301 and end product as the product type. The page lists eleven more Matter certificates under the same product name. — Checked a certification register, verified 2026-09-27
    Backs: Certification and product IDs, Protocols
  25. [25] SmartThings' Matter partner page, read in full 2026-09-27 through tools/page-read.mjs (6,463 characters). Verbatim: "Most Matter devices work with SmartThings right out of the box, making it easier than ever to build a connected home."; "Matter devices must connect to a compatible hub."; and its 'SmartThings Matter Devices Support' list, which includes "Thermostat". The page names device types only, and no brand or model. — Read the platform's own documentation, verified 2026-09-27
    Backs: SmartThings compatibility
  26. [26] Resideo's own CES 2025 announcement of the X2S (dated Jan. 6, 2025), read in full 2026-09-27 through tools/page-read.mjs (6,866 characters). Verbatim: "Matter and smart home compatibility. Compatible with Amazon Alexa, Google Home and Apple Home, users can also control the thermostat's setpoints and schedules via Resideo's First Alert app"; and "compatible with most HVAC systems and Internet routers (both 2.4 and 5 GHz)". The release names the three platforms under one heading and says nothing about whether any of them connects through Matter or through an account link. — Read on the maker's own site, verified 2026-09-27
    Backs: Amazon Alexa compatibility, Google Home compatibility, Wi-Fi bands it can use
  27. [27] Resideo's own X2S product page, read in full 2026-09-27 through tools/page-read.mjs (7,958 characters; the fingerprint matches change detection's). Verbatim: "Honeywell Home X2S Smart Thermostat SKU: RTH2CWF/U"; "$79.99 Unit price / Unavailable | In Stock Add to cart"; "manage your heating and cooling through your home WiFi using the First Alert app by Resideo, Amazon Alexa, Apple Home, or Google Assistant"; "The UWP® wall plate ensures easy installation and simplifies future upgrades, making it perfect for DIY home upgraders"; "C-wire required (24 VAC), WiFi 2.4 or 5GHz (802.11 b/g/n)"; "Connect to WiFi and control from anywhere using the First Alert by Resideo app - also compatible with Google Assistant, Apple Home*, and Amazon Alexa. *Matter Certified"; and the Works With block 'Amazon Alexa · Google Assistant · Apple HomeKit'. No plan, tier, trial or subscription is named anywhere on the page. — Read on the maker's own site, verified 2026-09-27
    Backs: Amazon Alexa compatibility, Google Home compatibility, Apple Home compatibility, Price, Subscription, Wi-Fi bands it can use, Power source, Installation, Service status, Research status
  28. [28] Resideo's own product page for the Honeywell Home X2S, read on 27 September 2026 and quoted word for word., verified 2026-09-27
  29. [29] Resideo's own X2S product page, read in full on 2026-10-04 (7,958 characters; the fingerprint matches change detection's). Verbatim: "manage your heating and cooling through your home WiFi using the First Alert app by Resideo, Amazon Alexa, Apple Home, or Google Assistant" · "Connect to WiFi and control from anywhere using the First Alert by Resideo app - also compatible with Google Assistant, Apple Home*, and Amazon Alexa. *Matter Certified" · Works With: "Amazon Alexa Google Assistant Apple HomeKit". The page names no route for Google Assistant, and names neither SmartThings nor Home Assistant. — Re-checked this against its sources, verified 2026-10-04
    Backs: Google Home compatibility, Apple Home compatibility, Home Assistant compatibility, SmartThings compatibility
  30. [30] Resideo's CES 2025 announcement of the X2S, read in full on 2026-10-04 (6,866 characters; the fingerprint matches change detection's). Verbatim: "the Matter-enabled and ENERGY STAR ® certified smart thermostat" · "Matter and smart home compatibility. Compatible with Amazon Alexa, Google Home and Apple Home, users can also control the thermostat's setpoints and schedules via Resideo's First Alert app". It states no route for Google Home and no function Google controls. — Re-checked this against its sources, verified 2026-10-04
    Backs: Google Home compatibility
  31. [31] The Connectivity Standards Alliance certificate page for Resideo Technologies, Inc.'s 'FocusPro S200 / X2S Smart Thermostat', read in full on 2026-10-09. Stated here in our own words: certificate CSA260DFMAT49891-50, issued on 3 February 2026 for an end product on Matter specification 1.3, firmware 2.0.4.0 and hardware revision A, family SKU TH2320WF4010 with family variant RTH2CWF, family FAM226247, vendor ID 0x131A and product ID 0x1003, over Wi-Fi, as a thermostat. The page lists eleven more Matter certificates under the same company. — Checked a certification register, verified 2026-10-09
    Backs: Certification and product IDs, Protocols
  32. [32] Resideo's CES 2025 announcement of the X2S, read in full on 2026-10-09 (6,866 characters). Verbatim: "Matter and smart home compatibility. Compatible with Amazon Alexa, Google Home and Apple Home, users can also control the thermostat's setpoints and schedules via Resideo's First Alert app" · "compatible with most HVAC systems and Internet routers (both 2.4 and 5 GHz)". It states no route for Alexa or Google Home and no function either controls. — Read the original source directly, verified 2026-10-09
    Backs: Amazon Alexa compatibility, Google Home compatibility, Wi-Fi bands it can use
  33. [33] SmartThings' Matter partner page, read in full on 2026-10-09 (6,463 characters). Verbatim: "Most Matter devices work with SmartThings right out of the box, making it easier than ever to build a connected home." · "Matter devices must connect to a compatible hub." Its supported device-type list includes 'Thermostat'. The page names no brand or model. — Read the platform's own documentation, verified 2026-10-09
  34. [34] The Connectivity Standards Alliance's certified-products search page, read in full on 2026-10-09 (22,450 characters). Read plain, it is the search form and site navigation with no results, so it names no product. — Checked a certification register, verified 2026-10-09
  35. [35] Google Home Developers, 'Supported device types' for Matter, read in full on 2026-10-10 (18,225 characters). Verbatim: "Many Matter device types are supported in the Google Home ecosystem, though not all are fully supported." · "Note: Device types other than the ones listed here are not officially supported in the Google Home ecosystem." The table's Thermostat row (Thermostat cluster, Matter 1.0, Home ecosystem type Thermostat) is marked available in all three control columns, Google Assistant, Google Home app (GHA) and Smart Display. The page names no brand or model., verified 2026-10-10
    Backs: Google Home compatibility
  36. [36] The Connectivity Standards Alliance certificate page for Resideo Technologies, Inc.'s 'FocusPro S200 / X2S Smart Thermostat', read in full on 2026-10-10 (5,664 characters). Stated here in our own words: certificate CSA260DFMAT49891-50, issued 3 February 2026 on Matter specification 1.3 over Wi-Fi, family FAM226247, vendor ID 0x131A and product ID 0x1003. — Checked a certification register, verified 2026-10-10
    Backs: Google Home compatibility
  37. [37] Apple Support, 'Pair and manage your Matter accessories' (Published Date May 07, 2026), read 2026-10-10: "If you have an iPhone using iOS 18 or later, you can add Matter accessories to and control Matter accessories from the Home app without a home hub." · "However, for the best experience set up a home hub to add supported Matter and thread-based accessories to the Home app." — Read the platform's own documentation, verified 2026-10-10
    Backs: Required hub or bridge
  38. [38] Apple Support, 'Set up your HomePod, HomePod mini, or Apple TV as a home hub' (Published Date September 15, 2025), read 2026-10-10: "Set up a home hub to control your smart home accessories while you're away from home, share control of your accessories with others, and automate your accessories to do what you want, when you want." — Read the platform's own documentation, verified 2026-10-10
    Backs: Required hub or bridge
  39. [39] The Connectivity Standards Alliance certificate page for Resideo Technologies, Inc.'s 'FocusPro S200 / X2S Smart Thermostat', read in full on 2026-10-11 (5,664 characters). Stated here in our own words: certificate CSA260DFMAT49891-50, issued 3 February 2026 on Matter specification 1.3 over Wi-Fi, family FAM226247, vendor ID 0x131A, product ID 0x1003, primary device type 0x0301 (a thermostat). Same fingerprint as the 2026-10-10 read. — Checked a certification register, verified 2026-10-11
    Backs: Amazon Alexa compatibility
  40. [40] Amazon's 'Alexa Supported Matter Device Categories and Clusters' page, read in full on 2026-10-11 ("Last updated: Apr 08, 2026"): "Thermostat Set temperature, query current temperature Thermostat Alexa.ThermostatController , Alexa.ThermostatController.Configuration". The page names no brand or model., verified 2026-10-11
  41. [41] Record-keeping entry: the google, apple, smartthings, home_assistant answers of this record gained a per-function findings map from the platforms' own Matter files (google-matter.json, apple-matter.json, smartthings-matter.json, home_assistant-matter.json), 2026-10-17, verified 2026-10-17
  42. [42] Record-keeping entry: each maker disagreement on this page now says what is at stake for a buyer (the 2026-10-21 split into shown findings and research notes)., verified 2026-10-21

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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