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    brianmichalk

    @brianmichalk

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    Latest posts made by brianmichalk

    • RE: Hello there. Soil moisture sensor idea.

      I am doing exactly this, and found this thread trying to work the problem.
      I have an Acurite temperature/humidity sensor that transmits on 433Mhz. With RTL-SDR and OpenHab, I can connect the sensor to my sprinkler schedule.

      I am converting the RH values to gH2O/m^3. In direct sunlight, I'm seeing 140F, and the response of the sensor doesn't seem to be very reliable.

      I'm not interested in accuracy, mainly repeatability. I can find the threshold myself to determine when the lawn needs watering. In my case, I'm using the sensor fasted to the bottom of a plastic show box. It's in the yard open side down.

      I'm toying with the idea of a 2D array with threshold values for watering. humidity by temperature.

      posted in General Discussion
      brianmichalk
      brianmichalk