Matter 1.6 On The Chip Is Not A Device-Update Promise
The useful news in Silicon Labs' Matter 1.6 rollout is not that another chip can run the standard. It is that device makers now have several hardware paths to the update.
That is good for future products. It is not proof that a smart lock, sensor, light, or thermostat already in a home will receive Matter 1.6—or that its controller will expose the new features when it does.
For buyers and installers, the support chain matters more than the silicon headline.
The Signal
Silicon Labs' June 25 SDK release is aligned with Matter 1.6 for Thread devices built on MG24, MG26, and MG30 hardware. It also covers Wi-Fi designs using SiWG917 or MG24 with SiWN917.
That list matters because it spans multiple hardware generations and network designs. Matter 1.6 is not reserved for the newest Series 3 chip. A manufacturer may have an update path for an existing Series 2 design if its memory, product architecture, and support plan allow it.
But the same release notes contain the more important warning: Matter 1.6 certification was not finalized for that SDK branch at release time. Silicon Labs said teams needing the relevant certification fixes could wait for its 2.9.1 extension or apply them separately.
In other words, "the SDK supports it" and "this finished device delivers it" are different milestones.
Four Gates Stand Between A Chip And A Feature
A buyer-visible Matter 1.6 feature must clear four gates:
1. The chipset and software kit must support the feature on the exact radio design. 2. The device maker must build, test, sign, and distribute production firmware. 3. The finished product or update must complete the vendor's required certification path. 4. The controller ecosystem must implement and expose the feature.
The Connectivity Standards Alliance is explicit about the last point. Matter 1.6 adds NFC commissioning, cross-ecosystem management improvements, device capability reporting, security-sensor history, smoke and carbon-monoxide alarm mounting status, and more scalable certificate-revocation data. It also says manufacturers and ecosystems will implement those capabilities on their own timelines.
That means a Matter 1.6 badge should start a compatibility check, not end one.
Series 3 Adds Headroom, Not A Guarantee
Silicon Labs launched the Series 3 SiMG301 with up to 4 MB of flash and 512 kB of RAM. It supports Zigbee, Bluetooth Low Energy, and Matter over Thread, with initial positioning around mains-powered lighting, switches, sensors, and controllers.
The extra headroom is relevant as the Matter software stack grows. Yet Silicon Labs continues to position mature Series 2 hardware for lower-power endpoints, and its current Matter 1.6 SDK supports both older MG24/MG26 paths and MG30 Series 3 hardware.
So there are two bad assumptions to avoid: an older chip is not automatically stranded, and a newer chip does not automatically promise years of product updates.
The exact implementation matters too. Silicon Labs removed Matter-over-Wi-Fi support for one MG24-plus-WF200 combination in this release and requires updated connectivity firmware for new SiWN917 and SiWG917 binaries. A broad "Matter-capable" description can hide that level of dependency.
What Buyers And Installers Should Verify
Before buying for a promised Matter feature, ask:
- What Matter version ships on this exact model today? - Is the connection Thread or Wi-Fi, and what border router or controller is required? - Has the manufacturer committed to the update for this model—not merely its chip family? - Has the intended ecosystem announced support for the specific feature? - Is there an official recovery path if a firmware update fails?
For existing devices, wait for manufacturer firmware. A developer SDK is not a safe shortcut for a retail lock, alarm, thermostat, or light unless the vendor explicitly supports that procedure.
Silicon Labs' self-reported 200-node office test is encouraging: it recorded 100% on-network commissioning, multicast latency as low as 87 milliseconds, and under 1% packet loss for most payload sizes. But it validates a platform under its tested conditions. A home's border-router placement, radio interference, firmware, and controller still determine the installed result.
The Takeaway
Matter 1.6 support across several Silicon Labs platforms gives manufacturers options and gives existing designs a possible runway. It does not give consumers an update date.
Buy the product support contract: the exact model, shipped firmware, certification, controller compatibility, and vendor update record. The chip creates the possibility. The manufacturer and ecosystem create the experience.
- https://www.matteralpha.com/explainer/silicon-labs-series-3-matter-1-6-strategy - https://docs.silabs.com/matter/latest/sisdk-matter-release-notes/ - https://csa-iot.org/newsroom/matter-1-6-enables-more-intuitive-setup-multi-ecosystem-experiences-and-context-driven-control/ - https://news.silabs.com/2025-10-02-Silicon-Labs-Series-3-SoCs-Now-Available-to-Power-the-Next-Era-of-Connectivity - https://news.silabs.com/2026-06-16-Silicon-Labs-Advances-Large-Scale-Matter-Deployments-with-200-Node-Matter-over-Thread-Validation-Network