SmartDry laundry sensor review: This quick fix can make your old, dumb clothes dryer smart(er)

Modern clothes dryers are outfitted with such nifty high-tech features as steam drying, Wi-Fi connectivity, and moisture sensors to prevent energy waste—and possible clothing damage—from over drying. That all sounds great, but my dryer dates back to the 1990s. Is dropping $1,000 or more on a new model the only option that will smarten things up for me?
SmartDry offers one easy hack: A smart moisture sensor that mounts inside the drum, alerting you via an app when your clothes are warm and dry, so you don’t accidentally fry them.
SmartDry comes in a slim box containing three hardware components. The SmartDry sensor itself is about the size of a skinny mint tin, and it adheres magnetically to the inside of the dryer drum. It communicates with the SmartDry hub, a tiny USB-powered device, via Bluetooth serves as a bridge to your Wi-Fi network. Finally, a simple USB power adapter lets you connect the SmartDry hub to wall power; this must be permanently plugged in within 10 to 15 feet of the dryer in order for the system to work.
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