Shannon Hicks

The Sodaq_DS3231 library should work with the current Mayfly boards.  Here’s an example from a few years ago that does basic microSD card logging of the onboard sensors and doesn’t rely on ModularSensors:  https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger/blob/master/examples/mayfly1_TempHumidLight_simpleLogger/mayfly1_TempHumidLight_simpleLogger.ino

It sounds like you don’t have all the correct library files installed in your Arduino/libraries folder.  How many sub-folders do you have in that directory on your computer?  When did you last download the ModularSensors library dependency files?

That sounds like there’s probably an error in your code that is causing one or more missing functions calls to give an error when compiling.  Have you tried compiling the example sketch exactly as it’s written on that github page I linked above, with no edits at all?  If you’re successful in compiling that example, then compare your edited s…[Read more]

Section 6 of the EnviroDIY Monitoring Station Manual has instructions and photos related to building the station you have.  Section 6.3 in particular discusses the Hydros 21 CTD sensor that you’re having trouble with.  I’m attaching a screenshot of that section of the manual.  You can see in the photos how the sensor cable has a 3.5mm stereo he…[Read more]

What sketch are you running?  The debug statements above are mentioning Digi Xbee module, but your photo shows a Simcom SIM7080 module.  The code for a Digi Xbee modem is not compatible with the Simcom module shown in the photo.

If you’re trying to use the configuration shown in the photo, along with a Hyrdos 21 CTD sensor (as indicated in your c…[Read more]

What is the control board that you’re using between the Mayfly and the pumps?  Something with some relays?  How is it connected to the Mayfly?  Via Grove cables or the 2×10 header pins?  Can you post some photos of the setup, or maybe a wiring diagram?

Did you make the changes to the Mayfly’s solder jumpers and sketch?  There’s a discussion about the necessary changes here:  https://www.envirodiy.org/topic/digi-ltebee-on-mayfly-v1-x/

Digi brand boards won’t work with the Mayfly v0.5 boards unless you also use one of the special adapter boards we used to make and sell, but we haven’t used those since 2020 when the Mayfly v1.0 boards came out.  The 1.0 and 1.1 Mayfly boards eliminate the need for an adapter between the Digi board and the Mayfly, but you still have to make…[Read more]

I know several people who have told me they’ve deployed Mayfly loggers in sensor stations on buoys or some other sort of floating platform, but I don’t think any of them have shared their methods or photos of their equipment.  We’ve done several ourselves over the past few years, and I’m attaching a photo of one of our most recent versions.  The l…[Read more]

There are descriptions of the battery and solar panel options in section 6 of the Monitoring Station Manual knowledge base, and also on this page about Mayfly Logger Battery Options.

No, we’ve been busy with other projects and haven’t had time to do any more testing with the Digi modules.

What do you mean by “it has told me the file belongs to another station”?   The Mayfly is giving you that warning?  Or do you get that warning if you try to manually upload files to MonitorMyWatershed.   How many files are on the microSD card after a week-long or month-long deployment?  It should be one continuous file unless the logger is resta…[Read more]

Yes, the EnviroDIY sim7080 LTEbee module is compatible with the previous versions of the Mayfly board.  There are no hardware changes to do, but you will have to edit your code slightly.  The v1.x boards control power to the Bee socket (bee header pin 1) by using the the Mayfly’s D18 pin, allowing you to completely turn the 3.3v supply to the b…[Read more]

Have you replaced the battery pack with another, fully-charged one?  Sometimes when they are going bad (the metal under the battery’s plastic wrapper rusts after a few years in enclosures with condensation issues) they can cause intermittent power outages, which are sometimes hard to detect if your solar panel is capable of supplying enough power…[Read more]

It looks to me like the CTD sensor was damaged during whatever event happened on April 5.  Unfortunately the sensors are very sensitive to physical damage so you’ll probably need to replace it with a new one.

We haven’t had a chance to do further testing on why the Digi modules only worked a few times after startup, but it sounds like you experienced the same thing we did.  We’ll see if we can revisit the issue and make sure our existing software examples work with them or if we’ll have to make a few changes.

The electronics themselves are rated up to 85 degrees C (185F).  We’ve never had an issue with the boards at high temperatures, it’s just that the lipo battery packs don’t really like extreme temps (either hot or cold) because they don’t charge efficiently.  Just doing a cursory check of random stations on Monitor My Watershed in warm climates, I…[Read more]

A Mayfly Data Logger should be able to communicate with a LI-710, but someone would have to write a specific SDI12 library file of commands for that sensor, using the example command info in the manual.  It also looks like it’s a continuously-powered sensor, requiring 0.125mA at 12v, with up to 2A during initial startup.   I assume you’ll be po…[Read more]

What sensor(s) are you using with the board?  Have you reprogrammed the sketch onto the Mayfly recently, or are you using a board that was programmed last year or earlier?   Some people seems to be having issues with boards not sleeping/waking properly using the most recently SDI12 libraries, so if you’ve recently reprogrammed the board, then th…[Read more]

No, LiFePO4 batteries should never be used with a Mayfly board because the onboard charging circuitry is only designed to work with 3.7v Lithium Ion packs.  There’s a summary of important battery information and options here: https://www.envirodiy.org/battery-options-mayfly/