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neilh20

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Viewing 10 posts - 161 through 170 (of 371 total)
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  • 2021-09-18 at 9:48 PM in reply to: Mayfly not writing to SD card = possibly a libraries issue? #15905
    neilh20
    Participant

      An idea, equipment failure isolation.  (assuming you’ve got the board in a lab location) Possible combinations of the three variable 1) switch uSD and 2) switch Mayfly  3) add separate USB power supply via USB cable.  Does the Mayfly always fail writing to the uSD, even with known working uSD.   That could be that the uSD slot has a failure (effectively Mayfly bad).  I  get a white/red SD card so that I give each SD card a number on the white portion so I can track them.

      2021-09-14 at 10:59 AM in reply to: Using Xbee Cellular Modem with ThingSpeak #15900
      neilh20
      Participant

        @zeke-holloman  great glad to hear it.

        Which modem did you buy and where did you get it?. I thought they were in short supply,  and I’ve been keeping my eye open for them.

        I’ve been using the Digi LTE XB3-C-A2-UT-001, which needs the the latest XCTU modem board to upgrade as its is a complex process.

        2021-09-13 at 6:31 PM in reply to: Stability Testing ~ how to do it? #15887
        neilh20
        Participant

          I’m using Release 0.30.0 for stability regression testing, its gone well, and captured a visual description of it here 0.30.0 testing

          2021-09-10 at 2:50 PM in reply to: Extracting Data Query #15867
          neilh20
          Participant

            Hello @d_bozza123, the Ponsel sensor looks very interesting.

            I’ve interfaced to a SDI-12 sensor Insitu LT500.

            My suggestion is you think of breaking up the work into units.

            That is first how to read the sensor Ponsel, and 2nd how to store it to the .csv

            For my sensors, it required creating a sensor interface to read the parameters from the instrument.

            eg https://github.com/EnviroDIY/ModularSensors/blob/master/src/sensors/InSituRDO.h

            or similarly in my case https://github.com/neilh10/ModularSensors/blob/release1/src/sensors/InsituTrollSdi12.h

            Then in the program  file eg “simple_logging.ino” create the sensors

            See Variable* variableList[] =  in https://github.com/EnviroDIY/ModularSensors/blob/master/examples/simple_logging/simple_logging.ino

            To   think of LoRa is a great idea, and a number of people are thinking about it. So just curious where it would visualize the data on the internet?.

            A smaller step would be to post to MonitorMyWatershed.org over a cellular modem LTE to learn about the flow of data?

            One of the issues with LoRa might be how is wall time synced to the mayfly?

             

            2021-09-03 at 6:54 PM in reply to: Could Mayfly have been damaged during storm event? #15857
            neilh20
            Participant

              Hi Cheryl, nice pics, good to have a record.

              Typically on pressing reset, the LEDs dance red/green for a few seconds.  The orange light would seem to indicate its getting power from the solar panel and charging the battery.

              From the pictures it would seem that any “Static electricity” lightening would be channeled by the vegetation around it.

              If the recording to your uSD stopped on 8/12/2021 that seems to me the processor failed. If the sensor failed, then you would still get readings, but they would be the default (typically -999.99).  I did have one system (not a Mayfly) that was in a forested humid setting in N California Mattole forest, and some growths appeared across some lines (reset of course), that caused a failure.

              When visiting a site I always take a spare Mayfly with me. I always compile my field software release to .HEX and keep a copy so that I swop out a mayfly relatively easily if needed.

              Perhaps some of the other users could comment.

              2021-09-03 at 3:36 PM in reply to: Could Mayfly have been damaged during storm event? #15852
              neilh20
              Participant

                Hello Cheryl. I wonder could you say what its setting is. What is the geography, what wires are coming out, and how is it powered?

                For electronics any form of excess voltage on processor pins can cause the device to fail. However its very difficult to figure out exactly what the cause is, as they say it can be complicated.    You can inspect it visually to see if there are any burnt indications, also smell the board – fried electronics can leave a nasty wiff. Devices can fail by themselves, and typically if its an internal fault it fails in its “infancy” – first couple of weeks of running. Once it has seasoned, its unlikely to fail.

                From my professional experience as an electronic engineer,  usually if something fails, its easiest to just replace it.  In commercial business they usually replace a device, and keep a count of the number of times something fails. I have seen some boards that had extreme lightening burns, but pretty unusual.

                I once talked to a USGS guy who was managing stage gages sensors on the Ohio River for navigation ~ so water level was highly visible for ships to transit the river. They only use bubbler sensors there – no electrical connection with the water level. He talked about lightening strikes traveling down the Ohio river.

                With lightening protection, you can think of it in two parts 1) protecting the processor with electrical clamps and diodes, and 2) diverting the electrical energy into the ground.

                I was part of professional group that was discussing electronics (irrigation controllers) failing in Florida. The irrigation controller wires had a good electrical protection clamps. Florida is largely on a reef, prone to lightening, and its very difficult to conduct lightening into the ground because of that reef. Eventually they had to use a professional grounding method to ensure good grounding.

                2021-08-31 at 11:58 AM in reply to: Mayfly Availability #15849
                neilh20
                Participant

                  Many thanks.

                  2021-08-30 at 1:35 PM in reply to: Mayfly Availability #15847
                  neilh20
                  Participant

                    Hello @shicks.  Just wondering if you can give any insight as to the process, when you think you might be able to tell us about what the new revision looks like, or possibly any visibility on when it might be available, and the process gates you are going through.  I realize some times this is a bit like asking how long is a piece of string, and happy to help out if I can.     I’m just doing a scope of work, as part of California Wildlands Conservation board grant, and talking about using the Mayfly, and saying its not available right now  and its expected to be available shortly. Many thanks for any insights.

                    2021-08-13 at 11:14 PM in reply to: How to dump contents of file on SD card to serial #15835
                    neilh20
                    Participant

                      Listing the directory with L? needs a bit of cleanup but looks like this

                      2021-08-13 at 11:10 PM in reply to: How to dump contents of file on SD card to serial #15834
                      neilh20
                      Participant

                        Listing the active logger file, recorded by TeraTerm with time stamp,

                         

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