Shannon Hicks

Thanks for the heads up, I just updated the availability page.  We shipped more boards to Amazon before the holidays, but they haven’t restocked them yet.  Hopefully they’ll be back in stock and available soon, but in the meantime, they’re still available in 5-packs in the EnviroDIY Shop.

It sounds like you’ve got one of the older Digi LTE cell boards?  We retired most of ours in 2020 because they failed after a year or two of operation, which is why we developed our own LTEbee module based on the SIM7080.  What does the data on you microSD card say the signal strength and battery voltage is since the station went offline?

The Mayfly v1.1RevB board uses a 6-pin Tag-Connect socket for the ICSP header:  https://www.tag-connect.com/product-category/products/cables/6-pin-target

Previous versions of the Mayfly boards used standard header pins for the ICSP header, (0.5″ spacing on v1.0 and v1.1RevA, and 0.1″ spacing on v0.5 and older).

The Y511-A has a wiper motor that draws a little too much power on initial startup, so unfortunately even the newest Mayfly 1.1RevB still can’t power it directly.  Our early 1.0 prototypes handled all the various 12v sensors just fine, but the voltage regulators on that prototype have been out of stock for the past 18 months, and we’ve been…[Read more]

With the Y511-A sensors we have (that were purchased about a year ago), whenever you apply 12v to the power wire, the wiper spins continuously in one direction for 5 full revolutions and then “parks” the wiper blade in the home position.  Then it pauses for a few seconds, then it performs the actual back-and-forth cleaning wipe motion (not full…[Read more]

No, the only official way to buy a single Mayfly is through our listing in Amazon, while 5-packs can be purchased through the Shop on this website.

It should work fine, assuming you’ve wired the device to the Mayfly properly (did you connect the Ground of the Mayfly to the Ground of the modem?)  What is the operating voltage and communication voltage of the modem?  The mega2560 is a 5V board, while the Mayfly is a 3.3v board.

Sorry I didn’t catch this earlier when I looked at your code.  But in line 39, you included the wrong library.  All of the various Mayfly board versions we’ve ever built have the ADS1115 chip on them, so you need to specify the ADS1115 library and no the ADS1015 library (because the 1015 is the lower-resolution version of the chip).  So line 39 if…[Read more]

I think you might be mistaking the monthly fee with the initial $20 auto-pay amount they charge to maintain a positive balance in your prepaid account.  The typical plan we recommend is the Maker Flexible plan, which is $0.60 per month (whether you use the card or not) and then $0.40 per MB of actual data usage.  Most of our loggers (when t…[Read more]

Which hardware version of the Mayfly board are you using this sketch on?

As long as the cards are formatted for FAT32 and you can read/write to them with other Mayfly boards or Windows devices, then it’s possible the on-board memory card socket on that Mayfly is broken.  Is this a brand new board that you’re using a card in for the first time?  If you’ve got an EnviroDIY vertical microSD adapter you could try putting t…[Read more]

I use pin 22 on line 145 because I’m using a prototype Mayfly board that is able to generate 12v to directly power the external sensors. If you’re using an external 12v source for your sensors, then it’s fine to put -1 on line 145.  And I’m using a Max13412 RS-485 chip on my modbus adapter, which has auto direction control and internal 5v…[Read more]

I looked at your sketch, it’s based on some really old examples we published many years ago at the beginning of the Mayfly project, but it should still work if you’ve got all the original old libraries.  Many of them have been replaced or updated since then, and major changes were made to the Mayfly board design in recent years, making some of…[Read more]

Thanks for posting your code, I edited your post to put it into the “code formatting” window that you can use when pasting code into our forum.  It’s the little unlabled icon that looks like this:  “<>” in the toolbar above the text entry box.

Your issue is caused by an error on line 186.  It should look like this:

new Ca…

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When you power up the ClariVUE10 sensor, we’ve found that it take a few seconds to warm up before the Mayfly can “see” it.  So when that sketch cycles through all of the available numbers and letters, it usually doesn’t see the ClariVUE until the second loop through.

So when you first connect the sensor from the factory and run the sketch, it’ll…[Read more]

For the past year we’ve had 8 stations using SDI12 CTD sensors and Yosemitech wipered turbidity sensors together on one prototype Mayfly using the EnviroDIY RS-485 half-shield.  It also works with other generic modbus adapters too. We’ve had no issues with not being able to read the sensors or with dropped readings. I’m attaching the code below…[Read more]

When you changed the SDI12 address of the turbidity sensor to “2”, did you use the same Mayfly board and the  “SDI12/b_address_change” example sketch that comes with our libraries, or did you change the address with a different board or instrument?

The only difference between the Gen 1 and 2 Hydros21 sensors is that the Gen 2 sensors need a little more time to respond to the SDI12 measurement command, which is hardcoded into one line in the MeterHydros21.h file within the ModularSensors library.  If you’re using the most recent version of ModularSensors, then your code will support both…[Read more]

From the sketch, it looks like you’re trying to operate both sensors on the same logger by using a separate data pins for each sensors?  That’s not the correct way to do it because of how the underlying EnviroDIY SDI12 library functions. You should instead put both sensors on the same data line (usually D7).  Each sensor will need its own unique a…[Read more]

The old Campbell OBS3 turbidity sensor was an analog-output sensor that had 2 separate voltage outputs, one 5v power supply wire, and 3 ground wires, which is why I designed the old version of the 6-pin screw terminal board that way, because we primarily used it with the OBS3 sensors and connected it to one of the Aux Analog Grove jacks on the…[Read more]