Here’s how to turn an old Samsung Galaxy phone into a smart home sensor

Samsung has launched a beta program to bring some older Galaxy phones to new use. Owners of certain phones can download an update to turn the device into a smart home sensor with some useful features – it can detect the sound of a crying baby or turn on a light when it gets dark. The program is limited to certain models launched in 2018 or later, which is pretty limited, but it’s a nice, accessible offering that could help users get a little more out of their old devices.

Announced earlier this year at CES, the company is launching the program in the US, UK and Korea starting today. Downloading a software update via the SmartThings app gives users access to two basic functions. The first is an audio sensor that detects the sound of a crying baby, the barking or meowing of a pet, or a knock on the door. When it detects any of these, it will send an alert to your phone with a recording of the sound.

The other feature is a light level sensor that can automatically turn on a connected lamp when the brightness levels in a room drop below a certain threshold. Samsung says the update will include battery optimization needed to power the phone and keep it functioning as a sensor for a long time, although the company doesn’t specify how long it could run between charges.

Galaxy S, Note and Z series phones launching from 2018 are eligible, provided they are running Android 9 or higher. Samsung says more devices will be supported in the future, including hopefully more budget-minded ones that owners are less likely to trade in. And if those limited features aren’t appealing, there’s a lot more you can do with your old phone if you don’t mind a DIY approach.

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