ELA Innovations sells Bluetooth Low Energy based IDs and Sensors in different flavor ranging from ID, Temperature, Temperature and Humidity to Digital IO and more. From some tests I had a Temperatue and a Temperature and Humidity lying around and tried to connect them to my Home Assistand installation. The Pucks are configured with a Smartphone App and I have set them to a Update intervall of 2 seconds and the usage of Bluetooth Service Data for the actual data. That way the Buck should last between 5-7 Year with their unreplaceable battery.
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