My favorite smoke alarm is the nest Protect (battery) 
until Google decided …. 
It would be great Aqara would decide to release one.
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This year we have newly added support for Zigbee Smoke Alarm to connect to Matter via the Matter Bridge. In the future, we will also consider the feasibility of Matter over Thread Smoke Alarm!
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Looking forward to a Matter over Thread smoke alarm 
I suggest enhancing smoke detectors to include detection of not only smoke and smoke temperature, but also dangerously high temperatures (even without smoke) and elevated levels of carbon dioxide (CO2). This would provide broader protection against different types of fire hazards and potential carbon monoxide poisoning.
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Thank you very much for your suggestion! We will consider it carefully. 
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