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Smart parking is just one application enabled by this Spanish company's Waspmote wireless sensor technology: It is allied with more than 2,000 developers and has pilot smart city projects going on in more than 75 countries.
One of the most closely watched parking examples is in Santander, where 375 Waspmotes were deployed to keep tabs on free parking spots. The system works by measuring magnetic fields to detect whether a spot is empty. The sensors are buried in the street inside a waterproof casing (shown here). The status is displayed on signs in the area, as well as via maps that can be accessed via a browser or mobile app.
Image credit: Libelium