ThailandAirGradient builds open-source indoor and outdoor air quality monitors that track PM2.5, CO2, temperature, humidity and other pollutants. The company is known for its open hardware and firmware, letting users build, repair and integrate the monitors with platforms like Home Assistant and its own dashboard. AirGradient appeals to people who want transparent, data-driven air quality monitoring rather than a closed black box.
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USACentralite is a US manufacturer of Zigbee smart home devices, including smart plugs, sensors and thermostats, and has built hardware for other smart home platforms. Its products are commonly used with hubs like SmartThings and Hubitat. Centralite is recognized for dependable Zigbee accessories aimed at DIY home automation.
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