The Wi-Fi radios can also collect information, such as data on how many people who are walking by a store actually go in. It does that by detecting the Wi-Fi signals coming from their phones. NetSense can even tell how long people spend in the store, as long as it can detect a unique identifier for those customers. Sensity's guidelines for developers say they should make customers opt in to that feature, Martin said.
Sensity makes some lighting gear itself, but mainly it gets its gear built into modules made by companies like Acuity. It also makes money by charging developers for access to the data in its cloud that's sourced from the NetSense endpoints. The company has more than 20 customers, including Simon Property Group, which is deploying NetSense in all of its more than 350 malls across the U.S., Martin said. It's also involved in smart-city trials in Chicago, Bangalore and other locations.
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