Smoke and CO detectors are essential home safety devices. However, traditional models have one major limitation. They just make a loud noise, and that siren can't help you if no one is home to hear it. By connecting smart detectors to Homey and automating them with Homey Flows, you transform that simple alarm into an active guardian for your home.
Imagine this: you're out for dinner, enjoying a rare evening away from home, when your phone buzzes. It's not a social update or a weather alert—it's a notification from your smart smoke detector. Thanks to Homey, you know exactly what triggered the alarm, and you can act immediately. That kind of peace of mind is more than just a convenience—it's a lifesaver.
Smart smoke and carbon monoxide (CO) detectors are essential tools in creating a safer, more responsive home. When integrated with Homey, they become even more powerful. Let’s explore how.
Intelligent Alerts Wherever You Are
The greatest advantage of a smart detector is its ability to communicate. The moment smoke or CO is detected, Homey does more than just trigger a siren. It instantly sends a critical alert straight to your smartphone. This notification is rich with detail, specifying the exact location and type of danger, such as "Warning: High CO level detected in the Boiler Room".

This alert system becomes truly intelligent by using Homey’s presence detection. You can create a Flow to check who is home during an emergency. If the house is empty, Homey immediately alerts both you and a trusted neighbor, recognizing that a local response is critical. However, if Homey knows someone is home, it can prioritize alerting that person directly without bothering your neighbors. This keeps everyone who needs to know about the emergency looped in from the start.
A Coordinated Emergency Response
In a real emergency, Homey can execute a coordinated response plan in seconds. When a smoke detector is triggered, Homey automatically initiates a "Fire Safety" Flow. This immediately turns all the smart lights in your home to 100% brightness to illuminate escape routes. It automatically unlocks all smart locks to ensure a quick and easy exit without fumbling for keys in a panic. To aid your escape and assist first responders, the Flow also opens all window coverings, providing clear visibility into and out of the home.

This automated response can also work to contain the hazard. A second Flow instantly signals your smart thermostat to shut down the home's HVAC system, preventing the circulation of dangerous smoke throughout the house. It turns off all smart plugs shutting down appliances and reducing the risk of electrical fires. All of these actions happen together in the first critical seconds of an emergency.
Proactive Maintenance and Testing
Smart smoke and CO detectors always watch over their own health, constantly monitoring their battery levels. You no longer have to deal with that annoying low-battery chirp at 3 AM. Instead, Homey sends a notification to your phone weeks in advance, telling you exactly which detector needs a new battery. This gives you plenty of time to replace them and keep your home safe.
Beyond battery life, you also need confidence that your detectors will work correctly in the case of an emergency. Homey helps you automate these safety checks with a simple monthly Flow. This routine commands every alarm in the house to briefly sound its siren to confirm it is operational. This regular test provides peace of mind, knowing your safety network is always ready.
Stay Safe, Stay Informed
Your home is your haven, and protecting it shouldn't depend on chance. With smart smoke and CO detectors connected to Homey, you're not just reacting to emergencies—you're staying a step ahead.
So whether you're on vacation, at work, or just in the next room, you can breathe easy knowing your home is looking out for you. Ready to level up your home safety? Start by connecting your smart smoke detectors to Homey today.
Homey gives you the freedom to choose, working with smart smoke and CO detectors from dozens of trusted brands like Frient, Fibaro, Shelly, Aqara, and Netatmo. Get started for free with Homey Cloud, or go full-on with Homey Pro.
FAQ
What happens when a smoke or CO detector connected to Homey goes off?
Homey sends an alert straight to your phone with the exact location and type of danger, such as a high CO level in a specific room. From there it can run a Flow that handles lighting, locks, and other connected devices automatically, so the response starts before you even get home.
How does Homey know who to alert during an emergency?
Homey uses presence detection to check who's home when an alarm triggers. If the house is empty, it alerts you and a trusted neighbor. If someone is home, it prioritizes alerting that person directly instead of notifying the neighbor.
What does a Fire Safety Flow actually do?
A Fire Safety Flow can turn every smart light in the home to full brightness to illuminate escape routes, unlock smart locks so you're not fumbling for keys, and open window coverings to give first responders a clear view into and out of the home.
Can Homey help contain a fire hazard, not just alert me to it?
Yes. A second Flow can shut down the HVAC system to stop smoke from circulating through the house, and turn off smart plugs to cut power to appliances and reduce the risk of electrical fire.
Does Homey handle battery checks and alarm testing for me?
Connected detectors report their own battery levels, and Homey sends a notification weeks before a battery actually dies. You can also set up a monthly Flow that triggers every alarm in the house to sound briefly, confirming they're all still working.
Glossary
Homey Flow
An automation rule built in Homey that links a trigger, such as a smoke alarm going off, to one or more actions, like turning on lights or unlocking doors. Flows are what let a detector do more than just make noise.
Presence Detection
Homey's ability to recognize whether someone is home. During a smoke or CO alarm, it uses this to decide whether to alert a person directly in the house or bring in a neighbor because the home is empty.
Smart Smoke and CO Detector
A connected version of a traditional smoke or carbon monoxide alarm. Instead of only sounding a local siren, it reports directly to Homey, which can send phone alerts and trigger automated safety responses.
HVAC System
The home's heating, ventilation, and air conditioning setup. In a fire emergency, Homey can shut this down through a connected thermostat to stop it from circulating smoke through the house.
Smart Plug
A connected outlet that lets Homey control power to whatever's plugged into it. As part of a Fire Safety Flow, smart plugs can be switched off automatically to cut power to appliances and lower the risk of electrical fire.