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Data Gap When Voltage is Low

Home › Forums › Mayfly Data Logger › Data Gap When Voltage is Low

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    • 2019-09-09 at 3:54 PM #13132
      BrianJastram
      Participant

        When my Mayfly voltage is <3.65 it is programmed to just log data and not publish (to MMW via DigiXBeeCellular)? When the voltage is good again why doesn’t it send all the data that were logged in the interim? This is a remote site so I haven’t checked to see if the data are on the SD card. The logging interval is 5 min. (I’m planning to increase this to 30 min.),The voltage range I’m seeing is from 3.75 to 3.64. It’s solar powered and I have an adapter shield between the mayfly and my Digi XBee3 Cellular LTE-M/NB-IoT to manage power.

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      • 2019-09-09 at 4:06 PM #13134
        Sara Damiano
        Moderator

          It doesn’t send the data from the gap because the ModularSensors library simply doesn’t have that functionality. It doesn’t attempt to re-send data. The data should be on the SD card, as long as the battery was still high enough to log.

          I would really love to have that functionality in ModularSensors, but it’s not simple to implement and I just haven’t had time. If you do have time, I’d welcome a pull request!

        • 2019-09-09 at 4:25 PM #13135
          BrianJastram
          Participant

            OK, I see, thank you, that makes sense. I should be able to extend the time of >3.65V by increasing my logging interval from 5 to 30 min. I’ll keep that ‘attempt to re-send data’ project in mind as I gain experience and availability.

          • 2019-09-16 at 10:42 AM #13141
            Sara Damiano
            Moderator

              You can also try dropping the minimum battery voltage for the modem to ~3.5. Shannon has suggested that, especially if the battery voltage is going down at night but is likely to be recharged once the sun comes out.

            • 2019-09-16 at 10:59 AM #13142
              BrianJastram
              Participant

                I think the main problem right now is that the modem data session lasts about the whole length of the logging interval. The cell modem seems to stay on and connected too much.

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