The process is free, easy to set up, and doesn't use mobile data while helping you avoid upgrading to a mesh network.

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The phone in your drawer is more useful than you think ...

I’ve been building ESP32-based smart home devices using cheap sensors for the past few months. My drawer is filled with ESP32 boards, PIR modules, temperature sensors, sound sensors, light sensors, ...

You can put your phones to good use.

David Nield is a technology journalist from Manchester in the U.K. who has been writing about gadgets and apps for more than 20 years. He has a bachelor's degree in English Literature from Durham ...