Product Library / Security Systems & Alarms

Discontinued

Google Nest Protect (2nd gen)

Compiled by SmartHomeWorkflow Research · Google Nest · Security Systems & Alarms

Discontinued is not the same as dead, and the two are recorded separately on purpose. No end-of-service date for the app or notifications has been published as of 2026-07-19. The real hard stop is the device's own 10-year expiry, not a server shutdown. Google stopped making it, and every unit carries a hard 10-year expiry counted from its manufacture date rather than the day you bought it — so a clearance or secondhand unit may have very little life left, and it ends by chirping and announcing its own expiry in a way you cannot dismiss. Separately: for a safety device, smoke and CO events reach Google's own apps and nowhere else.

Exactly which product this is

Model number
S3000BWES (battery)
Generation
2nd gen
Region this page covers
US
Also sold or listed as
Nest Protect · Nest Smoke and CO Alarm
Replaced by
First Alert SC5 Smart Smoke & Carbon Monoxide Alarm

“Not established” means we have not sourced that detail yet — not that the product has no model number, generation or regional variant. We publish the gap rather than filling it.

Compatibility

EcosystemSupportThe catch
Google HomePartialPartial support — see the catch[16]Now managed in the Google Home app, but four features stay Nest-app-only (Video Capture, Emergency Shutoff, emergency contacts, and "What to do") — and the legacy Nest app is still mandatory for initial setup and factory reset, on a product line Google is migrating away from
Amazon AlexaDoesn't workVerified: does not work with this ecosystem[6]Google's own Alexa support page lists the entire supported set as Nest cameras, doorbells and thermostats — Protect is absent. Every legacy third-party path ran on Works with Nest, which stopped functioning 2023-09-29 and was never replaced for alarms.
Apple HomeDoesn't workVerified: does not work with this ecosystem[19]Never HomeKit-certified, and with no Thread or Matter stack there is no Matter route either. The Starling Home Hub bridge that used to solve this is itself no longer sold, so the last practical workaround is gone. Note the evidence is absence across Google's and Apple's own pages rather than an explicit statement from either.
SmartThingsDoesn't workVerified: does not work with this ecosystem[18]SmartThings' own Nest partner page lists supported categories as Camera, Doorbell and Thermostat. Protect is absent from a vendor-published list.
Home AssistantDoesn't workVerified: does not work with this ecosystem[17]Home Assistant says it outright: smoke and CO alarms are not currently supported through Google's official route for outside apps (Google's Smart Device Management program). Google's own list of devices that program supports confirms it — cameras, doorbells, displays and thermostats only. Google offers no supported way for any outside app to receive a Nest Protect alarm.

Protocols: WIFI · BLUETOOTH[2][5]

What it can do[11]

You can tell it to

  • Siren

It reports

  • Smoke alarm
  • CO alarm

Whether each platform's automations and routines can use it — not just whether its app shows it.

What it doesGoogle Home
Siren✗ app only
Smoke alarm✓ routines can use it
CO alarm✓ routines can use it

Platform documentation: Google Home — automation engine ceiling (2026-09-01)

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality[23]

✓ Works without a subscription: Yes.

Vendor account required: Optional — there is a documented way to use it without one.[12]

No paid plan gates anything on Nest Protect itself. Google's subscription — now called Google Home Premium, formerly Nest Aware — is priced and described for cameras, doorbells, speakers and displays, and never names the Protect. The smoke and CO 'sound detection' it advertises is a speaker and display feature: those devices listen for an alarm noise, and the Protect's own microphone is used only to check that its speaker and horn still work.

Maintenance reality

Security updates[10]

⚠ Google Nest's declared security-update support ran to June 15, 2020 (US-declared — the maker states this commitment for its US market) — that date has passed. It keeps working exactly as it does now, and no security flaw is known or implied here — but the manufacturer no longer has a stated obligation to issue security fixes for it.

⚠ THIS DATE PASSED SIX YEARS AGO AND GOOGLE'S SAME TABLE ROW SAYS THE DEVICE IS STILL BEING PATCHED — both halves are recorded because a reader needs both. Google's connected-home security-updates page lists “Nest Protect” with a release date of 6/15/2015 and a five-year minimum of 6/15/2020, and marks that same row “Yes” under “Currently receiving critical security updates”. What expired in 2020 is Google's stated obligation, not the updates, and on a smoke alarm that distinction is the whole point: the device's own ten-year expiry, already recorded on this record, is the harder deadline. ⊕ Identification: Google's table carries exactly ONE Nest Protect row and its release date of 6/15/2015 matches this record's own recorded first-sold year of 2015, which is what ties the row to the 2nd generation rather than to the 2013 original. ⚠ Stated as a limit rather than smoothed over: Google's UK PSTI Statement of Compliance lists “Nest Protect (A13, A14)” in its Group 2 declaration, and this record's recorded model number is “S3000BWES (battery)” — no Google source we read maps S3000BWES to A13 or A14, so the declaration is named here as context and was NOT used to identify the model. Google states the figure as a floor rather than an expiry, and the table computes it rather than declaring it: the column is headed “Release date + 5 year minimum”, and the page's commitment reads “Google Nest connected home devices will receive automatic security updates for at least 5 years from the date we start selling them on the US Google Store. Security updates will address critical issues known to Google Nest that are able to be resolved with a remote software update.” ⊕ REGION: US — Google's own commitment is anchored to its US storefront in the sentence this value rests on: 'Google Nest connected home devices will receive automatic security updates for at least 5 years from the date we start selling them on the US Google Store.' The scope comes from the document's own words, not from the fact that we list the US model.

Who it's for

Existing owners deciding whether to keep a working unit — the answer is that it still works and still gets firmware, until its expiry date. Anyone buying new should look at the First Alert SC5, which Google itself names as the replacement and which interconnects with existing Protects.

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 →

23 numbered sources· read them in the source's own words
  1. [1] support.google.com/googlehome/answer/15709068 read 2026-08-13, verbatim: 'Nest Protect is no longer available for sale, but is still supported.' No end-of-service or end-of-support date is published for the device, the app or notifications — so this catalogue records the alarm as still fully supported on a positive vendor statement rather than on silence, and the hard stop remains the unit's own 10-year expiry. Because Google states the product is not sold, there is no manufacturer price to cite and none is recorded. ⊕ The page also names the First Alert SC5 Smart Smoke & Carbon Monoxide Alarm as the compatible alternative US customers can buy through the Google Home app — independent corroboration of this record's existing pointer to the SC5 as the replacement, which until now rested on our own judgement. — Read on the maker's own site, verified 2026-08-13
    Backs: Market availability, Service status, Research status, Price
  2. [2] support.google.com/googlenest/answer/9229922 'Nest Protect 2nd generation technical specifications' (read 2026-08-09): the 2nd-generation block lists 'Wireless — Wi-Fi: 802.11b/g/n 2.4 GHz · Wireless Interconnect: 802.15.4 at 2.4 GHz · Bluetooth Low Energy (BLE)', and separately 'Connectivity requirements — Wi-Fi Internet connection · Nest app · Phone or tablet running iOS or Android with Bluetooth Low Energy (BLE)'. No statement of the radio's function appears on the page. ⚠ Unverified lead, explicitly not used as evidence: third-party summaries state BLE is required for App Silence and Safety Checkup; support.google.com/googlenest/answer/9245506 is no longer a live page, and the current 'Requirements for Google Nest and Chromecast devices' article does not contain the claim. — Read on the maker's own site, verified 2026-08-17
    Backs: Protocols, Works without the internet, Required hub or bridge
  3. [3] support.google.com/googlehome/answer/15709068 ("no longer available for sale, but is still supported"); support.google.com/googlenest/answer/9249942 (firmware 3.6, March 2025, post-discontinuation); support.google.com/googlehome/answer/15731767 and .../9249296 (10-year replacement from manufacture date; expiry chirp and spoken warning) — Read on the maker's own site, verified 2026-07-19
    Backs: Market availability, Service status, Research status
  4. [4] The 2025-03-28 announcement date is reported by tech press only. The Google Nest Community blog was reorganized and the original post could not be located on a Google-owned domain; archive access was unavailable. The FACT of discontinuation is primary-sourced; the date is not, so soldUntil is 'ended' rather than a year., verified 2026-07-19
  5. [5] support.google.com/googlenest/answer/9229922 lists Wi-Fi 802.11 b/g/n 2.4 GHz only, 802.15.4 at 2.4 GHz, and Bluetooth LE. The 802.15.4 radio runs Google's proprietary Weave interconnect for Protect-to-Protect messaging — it is neither a Thread device nor a Thread border router, so 'thread' is deliberately not listed in protocols. — Read on the maker's own site, verified 2026-07-19
    Backs: Protocols
  6. [6] Three platform-side pages, each published by the platform itself: support.google.com/googlehome/answer/9325080 (the Alexa-supported list omits Protect); partners.smartthings.com/partners/nest (Camera, Doorbell and Thermostat only); home-assistant.io/integrations/nest together with developers.google.com/nest/device-access/supported-devices (smoke and CO alarms are not among the devices Google's Nest developer programme carries). Root cause across all three: Works with Nest terminated 2023-09-29 (support.google.com/googlehome/answer/9293712). — Read what the other company publishes, verified 2026-07-19
    Backs: Amazon Alexa compatibility
  7. [7] support.google.com/googlehome/answer/15731767 and .../16324143 — Google names the First Alert Smart Smoke & CO Alarm as the compatible replacement and documents cross-interconnect between the two. Supersession recorded in supersededBy. — Read on the maker's own site, verified 2026-07-19
    Backs: Market availability
  8. [8] Launch price was $99 at 2nd-gen announcement (blog.google), but the product is no longer sold and the final Google Store price could not be recovered — the store page assembles itself in the browser and no archived copy was available. A stale launch price on a discontinued product would mislead, so no price is recorded., verified 2026-07-19
    Backs: Price
  9. [9] The 2014 CPSC recall-to-repair (~440,000 units, Nest Wave gesture) covered 1ST GEN units sold 2013-11-15 to 2014-04-03. This record is 2nd gen, which postdates it and is not affected. Recorded so the scope is stated rather than implied. The CPSC page refuses us a direct read, so this detail rests on a secondary account until it can be re-read at the source., verified 2026-07-19
  10. [10] Google, “Security updates & security validation results for Google's connected home devices” (support.google.com product-documentation answer 10231940), read 2026-08-19. Table row, verbatim across its four columns (Device | Release date | Release date + 5 year minimum | Currently receiving critical security updates): “Nest Protect | 6/15/2015 | 6/15/2020 | Yes”. Page-level commitment: “Google Nest connected home devices will receive automatic security updates for at least 5 years from the date we start selling them on the US Google Store.” Cross-read against Google's UK PSTI Statement of Compliance at https://support.google.com/product-documentation/answer/14869041 (signed Louise Bohmann, April 8, 2024), whose Group 2 UK Defined Support Period is “At least five years from when the device first became available on the Google Store in the US” — the same rule the table applies. — Read the original source directly, verified 2026-08-19
    Backs: Security-update support period
  11. [11] https://support.google.com/googlenest/answer/9232413?hl=en — the ecosystem's own integration documentation for this device (read 2026-08-20) — Read the platform's own documentation, verified 2026-08-20
    Backs: Capabilities
  12. [12] support.google.com, 'Set up Nest Protect with the Nest app' (read 2026-08-21). BOTH HALVES OF THE ANSWER — that an account is needed to set the alarm up, and that the alarm still works without one — COME FROM THIS ONE PAGE. The account half, verbatim from 'What you need to get started': 'Nest Protect / Wi-Fi and internet access in the same location that you're installing your Protect (your home's Wi-Fi network) / Wi-Fi network password / Phone or tablet / Latest version of the Nest or Home app / A Nest or Google account', and step 4: 'Sign in to your account — If you're new, you'll be asked to create an account. Otherwise, sign in if you haven't already.' The NO-ACCOUNT half, verbatim: 'Once you add your Protect to the Nest app or the Home app, you can get alerts on your phone, silence alarms with the app, and more. If you don't add your Protect to the Nest or Home app, it still warns you when it detects smoke and carbon monoxide (CO), but you won't get notifications from the app.' The same page names the generation this record covers, under 'Manage Nest Protect in the Google Home app — What you need … A Nest Protect (2nd gen)'. — Read on the maker's own site, verified 2026-08-21
    Backs: Vendor account required
  13. [13] Record maintenance by SmartHomeWorkflow: the region this product's security support applies to was filled in from evidence already on the record, verified 2026-08-27
  14. [14] Record-keeping entry: on 2026-08-30 each ecosystem this alarm does not work with was sorted into the reason it does not, rather than left as a bare no, verified 2026-08-30
  15. [15] Checked 2026-09-09 without opening a page. None of the URLs on this record is a page published by the maker of the alarm, so there was nothing first-party to read for bands, platforms or power. The Sengled Matter A19 bulb was the first record to land here and this is the second, which makes it a pattern worth recording: a record can pass every check we run and still cite nobody who makes the thing., verified 2026-09-09
  16. [16] Google's own Home and Nest help article 'Nest Protect now available in the Google Home app': 'You can check and control your Nest Protect settings, device status, notifications, and silence your Protect with the Google Home app.' Its own requirements list names 'A Nest Protect (2nd gen)', so the statement is scoped to this generation rather than the range. The enumerated set — settings, status, notifications and silence — is what supports a partial rather than a full rating. The same article records that 'Nest Protect is no longer available for sale, but is still supported.' — Read on the maker's own site, verified 2026-09-10
    Backs: Google Home compatibility
  17. [17] Home Assistant's own Google Nest integration documentation, read 2026-09-10 in full, about 44,000 characters of text. Verbatim: 'Other device types like Smoke and CO Alarms or Security systems are not currently supported by the SDM API.' The integration works through Google's Smart Device Management programme, as its own setup steps show, so this is Home Assistant stating that it cannot receive a Nest Protect. — Read what the other company publishes, verified 2026-09-10
    Backs: Home Assistant compatibility
  18. [18] SmartThings' own Works with SmartThings partner page for Nest, read 2026-09-10 through tools/lib/gated-fetch.mjs (HTTP 200). Its category list, verbatim: 'Nest Categories Camera Doorbell Thermostat'. No smoke, CO or Protect category appears, and 'Protect' occurs zero times on the page. — Read what the other company publishes, verified 2026-09-10
    Backs: SmartThings compatibility
  19. [19] Google's own 'Nest Protect technical specifications' help article (requested at support.google.com/googlenest/answer/9229922, served at support.google.com/googlehome/answer/9229922), read 2026-09-10. Its radio rows, verbatim: 'Wireless Wi-Fi: 802.11b/g/n 2.4 GHz Wireless Interconnect: 802.15.4 at 2.4 GHz Bluetooth Low Energy (BLE)'. 'HomeKit', 'Matter', 'Apple' and 'Thread' each occur zero times on the page. — Read on the maker's own site, verified 2026-09-10
    Backs: Apple Home compatibility
  20. [20] the record's own customer-facing prose fields as they stood before 2026-09-11 (no new external read), verified 2026-09-11
  21. [21] https://support.google.com/googlehome/answer/9229922 ('Nest Protect technical specifications', Google's own help centre, already cited on this record since 2026-09-10), read 2026-09-12. The 2nd-gen table has two columns, 'Nest Protect (Battery)' and 'Nest Protect (Wired)'. Power row, Battery column, verbatim: '6 long-life batteries (Energizer Ultimate Lithium L91 AA)' (the Wired column reads '120V connector' with backup batteries). Wireless row, spanning both columns: 'Wi-Fi: 802.11b/g/n 2.4 GHz' · 'Wireless Interconnect: 802.15.4 at 2.4 GHz' · 'Bluetooth Low Energy (BLE)'. Connectivity requirements row, spanning both columns: 'Nest app (check requirements)' · 'Phone or tablet running iOS or Android with Bluetooth Low Energy (BLE)'. IDENTITY: the model number this record covers is 'S3000BWES (battery)', so the Battery column is the one read; the band and platform rows apply to both columns. The Wi-Fi row names the device's own radio by standard, not a router prerequisite. ⊕ SUPERSEDES the 2026-09-09 note 'not researched: this record cites no manufacturer page at all' — true when written; this page was added to the record on 2026-09-10. — Read on the maker's own site, verified 2026-09-12
    Backs: Wi-Fi bands it can use, Power source, App platforms
  22. [22] support.google.com, 'Nest Protect technical specifications' (Google's own help centre), read 2026-09-15. 2nd gen table, Power row: Battery column '6 long-life batteries (Energizer Ultimate Lithium L91 AA)'; Wired column '120V connector' with 'Backup battery: 3 long-life backup batteries (Energizer Ultimate Lithium L91 AA)'. — Read on the maker's own site, verified 2026-09-15
    Backs: Batteries
  23. [23] Two Google pages, both read 2026-09-15 in a browser. (1) Google's own plan page, store.google.com/us/product/nest_aware, which now resolves to store.google.com/us/product/google_home_premium and states 'Nest Aware is now Google Home Premium. Current subscribers still get access to all the features they love.' It prices 'Standard $10/month or $100/year' and 'Advanced $20/month or $200/year', and every benefit it names is scoped to a camera, a doorbell, a speaker or a display: '30 days of event-based video history — Catch highlights of what happened on cameras and doorbells'; 'Intelligent alerts — Smarter alerts for familiar faces, garage door detection, package detection, smoke & CO alarm and more'; 'Gemini for Home — Use Gemini Live on your speakers and displays'; '24/7 video history — 10 days of 24/7 history for cameras and wired doorbells'; and the closing line 'A subscription unlocks more from your new Nest Cam, Nest Doorbell, or Google Home Speaker.' The string 'Nest Protect' occurs ZERO times on the page. (2) Google's own help article on sensors in Nest devices, support.google.com/googlenest/answer/9330256, which assigns the smoke-alarm listening feature to the speakers rather than to the Protect. Verbatim, for 'Google Home Speaker (2026), Google Nest Hub (2nd gen), Google Nest Audio, Google Nest Mini, Google Nest Hub Max, Google Nest Hub, Google Home Max, Google Home Mini, and Google Home': 'Allows you to talk to your voice assistant, make calls, and with a Google Home Premium or Nest Aware subscription in certain regions, detect sounds like smoke alarms or glass breaking (if you have enabled that feature).' And, for 'Nest Protect' specifically: 'Used by the Sound Check and Safety Checkup features to make sure the speaker and alarm sound are operational. The microphone is not used for any other purpose and is off except when checking speaker and horn functionality.' — Read on the maker's own site, verified 2026-09-15
    Backs: Subscription

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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