<![CDATA[Witch temp/hum sensor is best to use for battery powered sensors?]]>I know there are a lot of different temp/hum sensors but witch kind is best to use in a battery powered sensor?

]]>https://forum.mysensors.org/topic/3801/witch-temp-hum-sensor-is-best-to-use-for-battery-powered-sensorsRSS for NodeSat, 05 Sep 2026 08:45:16 GMTTue, 03 May 2016 05:25:50 GMT60<![CDATA[Reply to Witch temp/hum sensor is best to use for battery powered sensors? on Thu, 05 May 2016 17:59:05 GMT]]>@AWI I fully agree! The AM2302 (aka DHT-22) does not work, when the supply drops slightly below 3.3V, while the AM2321works at much lower voltage. I have used the AM2321 for more than 6 months to monitor my greenhouse

]]>https://forum.mysensors.org/post/38464https://forum.mysensors.org/post/38464Thu, 05 May 2016 17:59:05 GMT<![CDATA[Reply to Witch temp/hum sensor is best to use for battery powered sensors? on Tue, 03 May 2016 06:33:04 GMT]]>I use HTU21 without power regulator. directly battery operated with 2 pcs AA batteries/elements, have been working for a few months now.
Just set sleep to maybe 5 min and do reading, if reading = old reading goto sleep again. else send reading to controller.
This saves your battery usage

]]>https://forum.mysensors.org/post/38347https://forum.mysensors.org/post/38347Tue, 03 May 2016 06:33:04 GMT<![CDATA[Reply to Witch temp/hum sensor is best to use for battery powered sensors? on Tue, 03 May 2016 05:48:25 GMT]]>@Cliff-Karlsson use an i2C model BME280/Si7021/ SHT21/ HTU21. These work on low voltages and consume minimal. You can find boards with or without voltage regulator and/or pull-up's on Ali. Take a look at a great study which compares many of the sensors available.
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]]>https://forum.mysensors.org/post/38344https://forum.mysensors.org/post/38344Tue, 03 May 2016 05:48:25 GMT