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Wi-Fi, combined with the low-power Zigbee wireless standard, is collecting street-level data in Salamanca, Spain, about air quality variables, such as temperature, relative humidity, carbon monoxide, nitrogen dioxide, ozone and even noise levels. The data is supposed to let the city make adjustments in traffic management to improve air quality. When the Zigbee-based sensors (Libelium’s WaspMote nodes) detect a change, the node uses Wi-Fi to link with Libelium’s Meshilium gateway to send data to a control center for processing. Follow the link for more details on the Salamanca network.

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