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Monitor humidity

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    Monitor humidity

    I'm just getting started with 1-wire. I've ordered a OW server along with 10 temperature probes but I was wondering how to monitor humidity. Can I use a cheap sensor like DHT22 1-Wire Bus DC 5V Temperature and Humidity Sensor Module With 3 Wire Amazon or do I have to use the more expensive OW-ENV - Wall Mount Sensors.

    I am not sure if humidity sensors found on ebay or amazon can be used by themselves. I believe most humidity sensors include a stand alone temperature sensor because temperature is used to calculate humidity.

    I have used the following sensors and have been very happy with them:

    MS-TH - Temperature and Humidity Sensor available at

    OW-ENV-TH - Temperature / Humidity Sensor available at

    Plug-ins: UltraMon, UltraM1G, UltraCID, Ultra1Wire, UltraLog, UltraWeatherBug, UltraPioneerAVR, UltraGCIR


      The DHT22 uses a MaxDetect 1-wire bus which is incompatible with the Dallas 1-Wire bus: There are some details online on how to build your own humidity sensors that work with the Dallas 1-wire bus such as this one: None of them are cheap as humidity sensors tend to cost a lot. If you want to use the DHT22 series of sensors you could look at using Arduinos to integrate them with HS as there are a few options for that.

      HS 1990 Devices 1172 Events
      Z-Wave 126 Nodes on one Z-Net