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Steve Roberts

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    • #2337
      Steve Roberts
      Participant

      @syncope I have the same issue, but have a possible solution…. I sent you a friend request so we can discuss privately.

    • #1808
      Steve Roberts
      Participant

      Update for info.
      So I used last year and continue to use 6 ‘nodes’ of 4 ds18b20 one-wire waterproof sensors (potted in a stainless steel tube) on a single bus ~60m of outdoor grade cat5e. Each ‘node’ consisted of a set of 4 sensors taped at to a 50 cm long bamboo cane at intervals. Cane simple inserted into an augered hole in the soil and sensors pressed up against the side of the hole before backfilling. Sensor bus connected to a OWplug from taaralabs.eu and logged by a Sodaq Mbili with a GPRSbee sending the data by ftp to my server as csv files. Was pretty reliable last year, but seem to be having issues with condensation in the junction boxes this year. The sensors all record within about 0.1 to 0.2°C of each other when checked in a waterbath.

    • #1470
      Steve Roberts
      Participant

      I’ve been using flot, which uses jquery, as my website was already using jquery. Data comes from mysql / php

    • #1384
      Steve Roberts
      Participant

      If you are referring to internal temperature from the rtc chip, there is none on the v3; value of -127 means there is effectively no sensor.

    • #1264
      Steve Roberts
      Participant

      I am also looking to do the same thing. So would be interested to know if you find anything.

      I am currently looking at using multiple 1-wire ds18b20 sensors. Ultimately they could be built into a tube, or my plan – tape them to a stick at the relevant depths.

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