If you want to make your own system for doing so, Instructables user ICStation shows off how to use an Arduino to do it. The system here monitors temperature, humidity, and smoke levels and alerts ...

The device also keeps track of temperature and humidity. The entire system can be controlled via a web interface. The Arduino serves a web page that allows the user full control over the alarm.

Here’s a little smoke detector hack which [Ivan] has been working on. He wanted to extend the functionality of a standard detector and we’re happy to see that he’s doing it with a… ...

See our ethics statement. The new Place smart smoke and CO alarm from Gentex features a built-in nightlight, motion detection, and ambient temperature and humidity sensing. Image: Gentex ...