The invention of Matter was a grand kumbaya moment for the smart home. Built on the foundations of almost every concept smart home companies had dreamed up — from Apple’s HomeKit to Google’s Thread — the idea was to create a new technology on top of existing ones. One common standard to make it easier for manufacturers to build smart home devices and easier for people to use them, no matter which smart home platform they use.
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Z-Wave is remaking itself to find a new place in your smart home
But one protocol was left out of the party: Z-Wave, which is widely used in home security systems and embraced by the smart home enthusiast community. It was the latest example of Z-Wave getting left behind as the consumer smart home world explodes in popularity — and the latest reason to question whether the once-thriving standard still has a future.
Conceived in the late 1990s, Z-Wave is one of the original solutions for connecting IoT devices. It’s a local, RF-based wireless communications technology that relies on a central hub or gateway to talk to the cloud and other protocols. But that reliance on a hub is part of why it’s fallen out of fashion. You rarely see Z-Wave in mass-market smart home devices because other standards can connect straight to the internet. It was also a closed protocol, limited to one chip manufacturer, which could have driven up prices.
But in the five years since Matter launched, Z-Wave has been quietly reinventing itself. The once closed protocol is now open source. There’s a new version — Z-Wave Long Range (ZWLR) — that addresses a common limitation of the smart home by extending the range of devices like locks, lights, and sensors. Perhaps more importantly, the Z-Wave Alliance is now working on the structure and framework needed to bridge Z-Wave devices into Matter.
Today, Z-Wave is at a critical turning point. Apple, Amazon, Samsung, and Google are all-in on Matter, and Z-Wave isn’t present in any of those companies’ flagship products. If the standard is going to survive, its creators need to show it has a purpose that other protocols simply can’t match.
What is Z-Wave, and why should I care about long range?
Even if you’ve never heard of Z-Wave, it might be in your home. A mesh-based protocol focused on interoperability, reliability, privacy, and security, Z-Wave radios are found in most home security systems, including Amazon’s Ring, and smart home hubs from companies like Home Assistant, Aeotec, Hubitat, and Homey.
Z-Wave was embraced early on by the home security industry, including ADT, Vivint, Alarm.com, and others, which saw its security, baked-in interoperability, and backward compatibility as a way to allow customers to integrate smart home devices with their company’s proprietary security systems. It’s also the only UL-listed smart home protocol, a requirement for devices integrated into a security system.
”Everybody puts a Z-Wave chip in their security panel.”
“Every residential security system in the US, except one, uses Z-Wave,” says Avi Rosenthal, chair of the Z-Wave Alliance board of directors. “From your big Honeywells, ADTs, and Rings, all the way down to your little Alulas, everybody puts a Z-Wave chip in their security panel. The only exception is SimpliSafe.” Rosenthal says that by some estimates, Z-Wave is in 40 million homes in the US; there are also over 100 million Z-Wave devices in the wild worldwide.
Despite its sizable footprint, Z-Wave remains a niche protocol. Its reliance on a hub makes it less accessible to casual users accustomed to plug-and-play Wi-Fi and Bluetooth devices. And as a mesh network, multiple devices or repeaters are needed to ensure a stable connection, which can be an issue if you just want to install one door lock or light switch.
Z-Wave Long Range addresses some of these limitations. Introduced in 2020, and now beginning to appear in products, ZWLR extends range up to 1.5 miles line of sight — four times standard Z-Wave — and replaces mesh with the ability for all devices to connect directly to the hub, not to each other.
This should reduce failures caused by weak mesh networks or limited range. And, as all Z-Wave devices have to be backwards compatible, ZWLR can exist alongside Z-Wave mesh devices on a hub, as long as it supports both.
For smart home manufacturer Zooz, ZWLR has been a game changer. “Now we have ultra-reliable connectivity with unparalleled range,” says Agnes Lorenz, a VP at Zooz. Its direct hub-to-device communication means no need for repeaters, making existing devices more reliable and expanding the possibilities around outdoor devices, like motion sensors, leak detectors in the attic, and garage automation. “Now we can more easily automate things that are hard to access,” she says
Adoption is starting to ramp up, with over one hundred ZWLR-certified devices now on the market. Zooz transitioned its entire lineup to ZWLR, Shelly is also using the protocol, and the Z-Wave Alliance is working on expanding it to Europe. Just last month, Kwikset introduced two new long-range smart locks.
“This is one of the most compelling Z-Wave updates,” says Joshua Hodgson, product marketing manager at Kwikset. “Over a mile range versus 300 feet for standard mesh means connectivity challenges are no longer an issue.”
But does Z-Wave Matter anymore?
Even as the tech improves, Z-Wave’s biggest problem is that relatively few direct-to-consumer companies are implementing it in their devices.
While manufacturers such as Kwikset, who have used the protocol for years, still see Z-Wave as vital despite Matter’s rise, the fact is that there are very few “fun” Z-Wave gadgets out there. Much of what does exist are simple, utilitarian devices like sensors, lights, switches, and locks. There hasn’t been a splashy new Z-Wave product in years, and if you are looking to start a smart home with Amazon, Apple, or Google hardware, Z-Wave is just not part of the equation. That doesn’t look like it’s going to change anytime soon.
However, there is a hope for Z-Wave’s future in a Matter world. While Z-Wave’s reliance on a hub has arguably been its biggest barrier to adoption, Matter’s initial promise of a hub-free world hasn’t materialized. Matter controllers are essentially hubs, as are Thread border routers — both are necessary to use Matter devices. The smart home has come back around to the idea that you need a small computer somewhere in your home to run your devices. If these hubs must exist, why not include Z-Wave?
“Ultimately, it’s all about consumer choice,” says Jeff Sandoval of Kwikset. With Matter sparking renewed interest in smart homes, the idea of a universal hub to unify devices is gaining traction (again). Many advanced smart home hubs — including Homey, Home Assistant, and Hubitat — support both Z-Wave and Matter, but they remain niche. To survive, Z-Wave needs to co-exist with Matter and find its way into mainstream consumer products like smart speakers.
One strategy is to bridge Z-Wave devices into Matter ecosystems like Apple Home, Home Assistant, and Amazon Alexa, similar to how Philips Hue, Ikea, and Aqara are bridging devices to Matter. While bridging has been part of the spec since Matter launched, Rosenthal says it’s not been possible to certify a Matter Z-Wave bridge.
“There are plenty of silicon solutions available today, but nothing has been ‘blessed’ by both alliances,” says Mariusz Malkowski of Trident IoT, the newest Z-Wave chipmaker, which also manufactures chips for Matter, Thread, and Zigbee. “We want to simplify the process for manufacturers to make a commercial product to support both Z-Wave, Zigbee, Thread, and Matter.”
While some Z-Wave-compatible hub manufacturers have found ways to connect Z-Wave and Matter devices in their ecosystems, there’s no official way to integrate them, meaning there’s no simple, straightforward way to use Z-Wave devices in mainstream Matter ecosystems.
“Reports of our death have been greatly exaggerated.”
The Connectivity Standards Alliance tells The Verge that it welcomes the Z-Wave Alliance’s efforts here. “We are happy to see efforts to make the adoption of Matter easier for manufacturers and consumers, including simpler ways to bridge devices to Matter,” says the CSA’s Daniel Moneta. Rosenthal says the Z-Wave Alliance is actively working on certification parameters and rules to define a standard Z-Wave to Matter bridge for its members.
Once this standard is released, adding Z-Wave devices to Matter ecosystems will become simpler. Manufacturers will just need to add a software stack to their hubs that, as long as it contains a Z-Wave radio, could bridge Z-Wave devices connected to the hub to any Matter platform, including Apple Home and Google Home.
The benefit is that if Z-Wave devices integrate with Matter, it will help bring Matter’s ambition of “one smart home standard to rule them all” closer to reality. That would both strengthen Matter’s position in the industry and give Z-Wave a compelling reason to stick around. “So that, to the consumer, everything magically works,” says Malkowski.
Z-Wave isn’t a threat to Matter. With the majority of the smart home industry behind it, Matter still has plenty of momentum despite some early stumbles. However, without support from Matter, Z-Wave could become obsolete. Maybe not anytime soon, but the possibility exists. Bringing Z-Wave into Matter would be better for everyone — manufacturers and smart home users alike.
In the meantime, Z-Wave is pushing forward with its reinvention, hoping to find its role in this brave new world. Its new long-range capabilities, shift to an open-sourced standard, and finally having more than one silicon vendor make this a much easier path. As Rosenthal puts it, “Reports of our death have been greatly exaggerated.”
Microsoft may once again be struggling to keep up with its own climate goals, according to its 2026 sustainability report. As reported by GeekWire, the report states that Microsoft’s carbon emissions increased 25 percent in 2025, totalling 34 million metric tons “without select interventions.” Microsoft says this was “driven primarily by the expansion of our datacenter infrastructure,” as well as the company’s decision last February to stop purchasing “non-additional, unbundled renewable energy certificates.”
Several years ago, Microsoft set itself a goal to be carbon negative by 2030, meaning it will need to remove more carbon emissions than it produces. This isn’t the first time Microsoft has faced setbacks toward accomplishing that goal, as its 2024 sustainability report showed a similar rise in climate pollution. This year’s report admits that, “While AI infrastructure is driving demand for energy, water, land, and materials, sustainability solutions are not scaling fast enough to meet demand.”
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That old phone sitting in your drawer may have more life left in it than you think. You may look at it and see a dead battery, an outdated camera or a screen that no longer feels worth using. Google and researchers at the University of California San Diego see something else: a tiny computer that may still have useful processing power.
Their idea is called phone cluster computing. Instead of treating retired smartphones as electronic waste, researchers remove the motherboard and redeploy it as part of a low-carbon computing system.
Google says UC San Diego plans to launch a data center built from 2,000 Pixel smartphones in fall 2026. The goal is to provide low-cost cloud computing for students and researchers while reducing the need for newly manufactured server hardware.
That means the next chapter for an old phone may not be a junk drawer. It may be a server rack.
YOU COULD GET PAID FROM GOOGLE’S ANDROID DATA LAWSUIT
Researchers plan to launch a 2,000-phone data center at UC San Diego in fall 2026 to support students and research workloads. (Kurt “CyberGuy” Knutsson)
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What is phone cluster computing?
Phone cluster computing takes retired smartphones and turns their core hardware into a computing platform. The process starts by stripping each phone down to the motherboard. That board holds the processor, memory and storage. The display, battery, cameras, chassis and other phone-specific parts are removed.
That step is important because a full phone does not belong in a data center. Batteries can create safety issues. Screens and cameras waste space. The motherboard is the part that still offers computing value.
Once the board is removed, researchers load a general-purpose Linux system onto it. Android already runs on Linux at its core, but Android is built for mobile apps and personal devices. A data center needs something more flexible for cloud workloads. After that, the phone boards can be grouped into clusters. Many small boards then work together like a collection of tiny servers.
Why Google wants old Pixel phones for cloud computing
The AI boom has created a huge appetite for computing power. Data centers need more chips, more electricity and more cooling. At the same time, billions of phones fall out of use around the world.
This Google-backed project takes that conversation in a different direction by asking whether some useful computing can come from hardware we already made.
The project focuses on embodied carbon. That means the emissions created before a device ever turns on. Mining, manufacturing and shipping all add to that carbon footprint.
If a phone motherboard already exists, reusing it can avoid some of the environmental cost tied to manufacturing new hardware. Google says the motherboard accounts for about half of a phone’s embodied carbon, which makes it the most valuable part to recover.
How retired smartphones become low-carbon servers
You cannot plug a pile of old phones into a rack and call it a data center. The process requires careful teardown, new software and a way to manage many boards at once. Google says the project uses containerized applications managed by Kubernetes. That helps coordinate the work across many devices.
The phones are organized into self-managing clusters of about 25 to 50 boards. Each board works as a small Linux machine. Together, they can handle tasks that would otherwise run on traditional cloud servers. That does not make one phone equal to one server. A server has many more processor cores, more memory and data center-grade hardware. A phone board has fewer resources and tighter limits. Still, some jobs do not need a giant machine. They need enough compute to run efficiently without wasting resources.
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Google and UC San Diego are testing a cloud computing system built from retired Pixel phone motherboards, giving old smartphones a possible second life. (Google)
Can old phone processors handle cloud workloads?
The technical case is stronger than you may expect. Google says the single-threaded performance of modern smartphone performance cores can match or beat the per-core performance of some modern multicore servers. In one comparison, a 2023 Pixel Fold was tested against an ASUS RS720A-E11 server using SPEC benchmarks. The Pixel Fold’s performance cores beat the baseline data center server core on many of the tests. That sounds impressive, but there is an important catch.
A smartphone board has a smaller memory limit and fewer cores. It also lacks the management tools and hardware durability that servers are built around. So the project needs the right workloads.
UC San Diego is starting with educational and research computing. That makes sense because many classroom tasks can run on small cloud instances. Google says early experiments showed that a 20-phone cluster could support peak submission rates for a class of more than 75 students. The grading latency also came in below the default AWS backend used in the comparison.
Why UC San Diego is testing a 2,000 Pixel phone data center
UC San Diego plans to use the 2,000-phone cluster to support computer science classes and research workloads. Google says the deployment could support about 100 classes at once. It also describes the system as providing about 50 server-equivalents worth of compute at a fraction of the usual cost.
For a university, that could be a major advantage. Cloud computing costs can rise quickly, especially when many students submit assignments at the same time. If a reused phone cluster can handle some of that load, schools may save money while reducing demand for newly manufactured servers.
This also gives researchers a chance to test phone-based computing at scale. A small lab demo can look promising. A 2,000-board deployment will show much more about reliability, maintenance and day-to-day performance.
Phone cluster computing still has big limits
Phone cluster computing sounds promising, but it still has a lot to prove. Your smartphone was made for daily use in your hand, not nonstop work inside a data center. Data center servers are built to run for years with steady cooling, fast repairs and constant monitoring. Phone motherboards come from devices made for pockets, backpacks and kitchen counters. That alone raises some big questions.
The boards could fail faster than expected. Cooling may also become a challenge once thousands of tiny processors run side by side. Then there is the labor problem, because someone has to safely remove batteries, screens and other parts before the boards can be reused. Cost will be the deciding factor. If teardown, maintenance and replacement work get too expensive, this idea may stay in the research lab.
Phone clusters also will not replace the massive GPU systems that power advanced AI training. They make more sense for smaller cloud jobs, classroom tools and research tasks that fit within smartphone hardware limits. That still leaves plenty of useful work. After all, not every cloud task needs the newest chip.
Why old smartphones could help cut e-waste
The world’s e-waste problem is growing fast. The Global E-waste Monitor projects that electronic waste could climb to 82 million tonnes by 2030, while formal collection and recycling rates are expected to fall to 20%. Old phones are a big part of that problem because many never make it to a proper recycling program. They sit in drawers, land in closets or get tossed out with valuable parts still inside. Even when a phone no longer feels useful to you, its processor, memory and storage may still have work left to do.
CyberGuy has covered related second-life ideas before, including old smartphones being turned into tiny data centers and repurposed EV batteries helping power AI data centers. The common theme is hard to ignore. Some of the hardware already in circulation may still have useful work left to do.
FIVE DATA BROKER OPT-OUT MYTHS THAT LEAVE RETIREES EXPOSED
Google says reusing smartphone motherboards could cut hardware waste and reduce the carbon cost of building new data center servers. (Yawar Nazir/Getty Images)
How to safely recycle or reuse your old phone
This research does not mean you should toss your old phone into a random donation bin tomorrow. Before you recycle, donate, trade in or sell an old phone, you need to protect your data. Back up anything you want to keep. Then sign out of your accounts and securely wipe the device.
CyberGuy has a helpful guide on how to securely get rid of your old cell phone. Privacy comes first whenever you part with a device.
You can also consider trade-in programs, certified refurbishers or reputable electronics recycling programs. If the phone still works, buying refurbished can also keep devices in use longer. CyberGuy has covered what to know before buying refurbished electronics, which is helpful if you want to save money without taking a gamble. The key is to avoid letting old devices sit forgotten forever. A phone in a drawer helps no one.
What this means to you
That old phone in your drawer may not be as useless as it looks. Even if the battery is tired or the camera feels outdated, the processor inside may still have real value.
Now, you probably will not be mailing your old phone to a Google data center anytime soon. Still, this project points to a bigger shift in how we think about retired tech. Instead of sending every old device straight to recycling or letting it collect dust, companies, schools and researchers may find smarter ways to reuse the parts that still work.
There is also a money lesson here. If your current phone still runs well, you may not need to rush into an upgrade just because a newer model comes out. A battery replacement, trade-in or refurbished option could save you money while keeping perfectly good hardware in use longer. To me, that is the real takeaway. The phone you forgot about could possibly still have a job to do.
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Kurt’s key takeaways
Google and UC San Diego are testing how to turn retired Pixel phone motherboards into a low-carbon cloud computing platform. The project could give old smartphones a second life while reducing the need for newly manufactured servers. That is important as AI data centers keep demanding more computing power and more electricity. The first major test is expected in fall 2026 with a 2,000-phone data center at UC San Diego. If it works, the cluster could support students and researchers at a lower cost than traditional cloud infrastructure. However, this idea still has to prove it can handle the grind of daily use. Reliability, cooling, teardown labor and maintenance will determine whether phone cluster computing can grow beyond just research. To me, the most relatable part is sitting in your junk drawer. That old phone may seem useless, but its processor could still be powerful enough to help run cloud jobs. Maybe the future of computing starts with hardware we already forgot we owned.
Would you feel good knowing your old phone could help power cloud computing? Let us know by writing to us at CyberGuy.com.
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If you’re looking for a relatively affordable way to cut down on cooling costs, Google’s Nest Thermostat can help. It’s packed with smart controls and energy-saving features, and right now it’s on sale in white for $79 ($50 off), which is its best price of the year, at Amazon.
The smart thermostat is quick to install and makes it easy to adjust your home’s temperature whether you’re relaxing in bed or on your way home thanks to the Google Home app. You can also create schedules and control it with your voice using Google Assistant, Alexa, or another Matter-compatible voice assistant.
Once it’s set up, the Nest Thermostat can automatically turn the temperature down when you’re away to help reduce unnecessary energy use, while Google’s Savings Finder feature suggests additional ways to save over time. It also monitors your HVAC system and can alert you if something doesn’t seem right, making it easier to stay on top of maintenance before small issues become bigger, more expensive ones. If you’re eligible, Nest Renew can also automatically shift some of your heating and cooling to times when electricity is cleaner or cheaper.
That said, this is Google’s entry-level model from 2020, so you do miss out on some of the premium features found on the latest Nest Learning Thermostat. Unlike the flagship version, it won’t learn your schedule automatically over time, for example, and lacks support for Nest Temperature Sensors that let you prioritize the temperature in a specific room. Even so, if all you want is an easy way to adjust your home’s temperature remotely and potentially lower your energy bills, the Nest Thermostat is still a solid investment at this price.
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