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David Lutz

  • I wanted to resurrect this particular thread because we have been running into the same issue that Chan had. However, I note that there is a new variant of the SDI12 library as of roughly 2 weeks ago (EnviroDIY_SDI12_PCINT3) and I am pretty sure that it is an updated version of the SDI12_mod that Shannon sent in response a few years back in this…[Read more]

  • Hi Beth,

    Yes of course! Just checked – we have 0.5b. Don’t know how I overlooked that!

    Another quick question that you may/may not know – if you are connecting an external 12v power supply to the mayfly, what type of jack is needed to connect the power source to the Mayfly? Is that just a male JST jack? (pictured here: jack)

    Thanks!!

  • Dear EnviroDIY,

    I’m working on setting up a sensor network with a variety of soil moisture and temp/rh sensors. We’re using a CS-215 to handle temp/RH and it requires 12VDC. The trick is that we obtained our Mayfly via a colleague at another institution and aren’t sure if the board is 0.5 or 0.4. Obviously if it is 0.5 it can handle the 12V…[Read more]

  • David Lutz posted a new activity comment 4 years, 1 month ago

    Hi there Neil,

    Well right now we’re quite focused on a handful of important characteristics of forest ecosystems, predominantly air T, soil T, plant available moisture, and volumetric soil moisture. The general paradigm shift we see now is that single sensor nodes do not provide the spatial or temporal resolution for us to understand microclimate…[Read more]

    • For a leafy canopy 2.4Ghz gets absorbed by the water. 900Mhz gives a much range in a leafy canopy for lower power. The WiFi standard is evolving to include a “low data rate” in sub 1GHz – but no time lines for which silicon will have it first.
      I’d be interested in what you find with specific sensors – it can be painful – however calibration and…[Read more]

  • David Lutz posted a new activity comment 4 years, 1 month ago

    I’m working on constructing wireless sensor networks with the Forest Service and a handful of Research Universities across New England for use in forested ecosystems (soil, temp, humidity, irradiance, etc). Although I’m an ecosystem scientist and not an electrical engineer, there is a growing need to get portable low-cost sensors out for…[Read more]

    • Hi Dave
      Great to hear about it – this is a board to bring together the ecosystem sciences and software/electronic to make it happen.
      Be great to hear how you are going about defining and refining the sensor networks.
      I’ve been designing remote instream water sensors. The challenges has been low cost environmental protection, solar powering, field…[Read more]

      • Hi there Neil,

        Well right now we’re quite focused on a handful of important characteristics of forest ecosystems, predominantly air T, soil T, plant available moisture, and volumetric soil moisture. The general paradigm shift we see now is that single sensor nodes do not provide the spatial or temporal resolution for us to understand microclimate…[Read more]

        • For a leafy canopy 2.4Ghz gets absorbed by the water. 900Mhz gives a much range in a leafy canopy for lower power. The WiFi standard is evolving to include a “low data rate” in sub 1GHz – but no time lines for which silicon will have it first.
          I’d be interested in what you find with specific sensors – it can be painful – however calibration and…[Read more]

  • David Lutz became a registered member 4 years, 1 month ago