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I believe the sensor stop reporting normal values exactly when I restarted the board. I’ll have to check to make sure the sensor connector has a good connection. I believe we’re using the Grove stereo jack adapter board. (I didn’t assemble or program it. I am maintaining it.) I’ve attached a photo of the board. We do not have a celular board…[Read more]

Pressing the rest button only makes the logger code restart, the same as if you turned the power switch off and then back on, so it shouldn’t cause the sensor to stop working. Did the sensor stop reporting normal values exactly when you restarted the board? Did you accidently bump the sensor connector inside your enclosure and cause a bad…[Read more]

Ok, then the battery and charging system is working properly. I was under the false impression that the charging light was supposed to be lit constantly. However, I did make the mistake of hitting the reset button and now I’m not getting readings from the sensor in the stream. I’m only getting the battery level and the board temperature. The…[Read more]

The yellow LED on the Mayfly board indicates when the battery is actively being charged. If the battery is fully charged, then the yellow LED will be off. What does the data card file say the battery voltage was when you experienced the issue of the yellow LED not being lit? The Red and Green LEDs near the battery jack are programmed to blink…[Read more]

<h2 class=”user-nicename”>@shicks</h2>
I just checked Amazon and no Protoshields showing.  I guess shipment processing isn’t one day turnaround!

I can confirm Sara’s idea to wait before the marking and not during seems to be more reliable, I had an issue where (rarely) the sensors did not answer to a measurement request, this seems to fixed this.

It is hard to be 100% sure about this since it doesn’t happen often but it seems to be better this way, and since it is also SDI-12 spec…[Read more]

Is the small jumper on the Mayfly board next to the Aux Analog grove ports switched over to 5v from it’s default 3v position? Did you verify that all of the sensor wires are connected to the right ports on the 6-pin screw terminal board? Red wire to Vcc, White wire to D2, Blue wire to D1, and the other three wires (black, green, and clear) all…[Read more]

That is an interesting part, but I agree that the most dangerous thing about using it is the possibility of having the metal part of the holder (which is connected to the negative or ground side of the board power rail) contacting something inside the Mayfly case and shorting things out.

We’re planning to offer a 5-pack of just the vertical…[Read more]

I just thought I would add this option to the forum in case someone else has the same issue because I recently broke the vertical adapter that came with one of my kits.

I found this solution on Amazon:
https://www.amazon.com/gp/product/B07QXPG8HG/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Not as easy to use as the vertical adapter and you…[Read more]

I sent more protoshields to Amazon earlier this week, so they should be available as soon as Amazon processes the incoming shipment.

Hi James, thanks for the agupubs reference – very nice to see the LiDar work.
I had talked to a LiDar guy some years ago and they had said they didn’t think it would work for streams, but that ref is showing it very nicely.

I’ve used 20mA depth sensors with Onset loggers, and had a couple of UL6a…[Read more]

Hi guys,

I am looking for low-cost methods to measure stage in rivers and streams, and was wondering if anyone has had any success?  Neil’s transducers look great, but are too expensive for our needs.  The goal is to develop a rating curve and use it to calculate loads.

Has anyone had any success with cheap pressure transducers available on A…[Read more]

scornia,

I was having the same problem with the address change sketch (using the Atom PlatforIO) so I tried using Arduino IDE and that worked. It saw the SDI-12 address of 0 at pin 7 and I successfully changed it to 1 and now I’m getting values from the Meter CTD-10. Good luck. Let me know if you have any questions.

Okay, here is what I see …

Note: I am no expert but having an extra set of eyes helps sometimes.

I set up a dummy site and tried to replicate what I saw in your files. You can have a look at the site to compare it to what you have set up and let me know if it seems different. I will leave it up for a bit but it will be removed if we have…[Read more]

I’ve attached two of my files from earlier today.  The file with 08-20 is the raw data file created yesterday right from the Mayfly, and the 08-21 is the upload file created today as I described earlier.  I have been unable to upload the 08-21 file as of now.  I tried three times earlier this morning and twice this afternoon.  The third file, 08-…[Read more]

Remote programming a datalogger has never been a priority for the type of deployments we usually do, because our monitoring stations require frequent maintenance visits to clean the sensors or perform other tasks at the station. The most common reason for reprogramming a board would be if you’re adding or removing a sensor, or recalibrating one,…[Read more]

Interesting idea for a secondary board, perhaps linked into the USB. I have heard it done before via the JTAG, but I don’t believe this is available for Mayfly.
Possibly the biggest question on issues like this is power budget. If there was a reliable power budget for a linux SBC (beaglebone.org) it would be relatively easy.

One area to track…[Read more]