https://techcrunch.com/2021/05/18/sidewalk-labs-launches-pebble-a-sensor-that-uses-real-time-data-to-manage-city-parking/

Sidewalk Labs, Alphabet’s urban innovation organization, has announced the launch of Pebble, a vehicle sensor that’s designed to help manage parking in cities by providing real time parking and curb availability data.

Here’s how it works: small spherical sensors are stuck to the ground on parking spaces to note the absence or presence of a vehicle. Then solar-powered gateway hardware, which can be strapped easily to street poles, uses IoT to connect the sensor to the cloud through the cellular network. The data is then viewed and analyzed by real estate developers, parking operators or municipal agencies via a dashboard.