At the recent Embedded Linux Conference and OpenIoT Summit, Mozilla Technical Evangelist Dietrich Ayala proposed a simple and affordable solution to home automation: A discarded smartphone can handle some of the most useful home automation tasks without requiring expensive hubs and sensors -- or risking data security in the cloud.
“With a smartphone you can detect motion, sound, presence, and the absence of radio services,” said Ayala in his presentation, “Turning Sensors into Signals: Humanizing IoT with Old Smartphones and the Web.”
“Many phones have proximity or ambient light sensors, orientation, and battery,” continued Ayala. “
Read more: https://www.linux.com/news/repurposing-old-smartphones-home-automation