Shannon Hicks

In 2021, there was one small production run of the Mayfly v1.1 RevA boards that, due to an error by the manufacturer, used an incorrect resistor value for the 12-volt boost circuit, resulting in a lower output voltage, around 11.3v.  This was corrected in the next manufacturing run, along with making a few other changes, which is why the v1.1…[Read more]

There’s a section in the User Manual that should have been included in the shipment with your sensor (it’s also downloadable from here: https://metergroup.com/products/teros-12/teros-12-support/) that explains how to use the raw number collected by the sensor to calculate soil moisture content.

It looks like you’re having the same issues a few other people have reported lately. We’re working on a fix, but in the meantime, the easiest thing to do is to replace all your “MyDocuments/Arduino/libraries” files with the stable versions from last summer.  In order to do this, you’ll have to delete all the current library files on your PC.  If y…[Read more]

That means your IDE’s Serial Monitor baud rate is not the same as the baud rate in your sketch

Did you make sure the sensor is properly wired to your Mega, (tip to 5v, sleeve to GND, and ring to data) and that the pin number in the sketch matches whatever pin number you connected the data line to?  If all the wiring is correct, then it might be an issue with the latest SDI12 library that a few people have reported.  You could try r…[Read more]

The baud rate in the example sketches is usually 57600 or 115200, which is the rate for the Arduino board’s serial output port that it uses to communicate with your computer, not the sensor.  For whatever rate you choose, you have to manually change your IDE’s baud rate to match, otherwise you’ll just get gibberish on the monitor.  The baud rate o…[Read more]

I’ve attached a screenshot from Meter Group’s Teros 12 Integrator Guide.  It shows the wiring scheme for the bare-wire version and the 3.5mm stereo plug version.  If you’ve got the sensor with the 3.5mm plug, then you’ll need to compare this diagram to whatever breakout board you’re using to match the tip, ring, and sleeve to the power, ground, a…[Read more]

How many sensors are you wanting to connect to your Arduino board?  Do you have a Mega, or Nano, or both?  What sort of termination is on the end of your sensors?  Are you just wanting to display instantaneous sensor data on your computer or are you trying to build a logging device?

Thanks for the update.  We’re looking into it, my guess is there’s a conflict between two libraries that is causing some issues, so we’ll have to dig into it and narrow it down.

There’s information on this page, in Section 6.2 about the holes for the cable glands: https://www.envirodiy.org/knowledge-base/building-an-envirodiy-monitoring-station/

As mentioned on that page, the 1/2″ NPT cable glands require you to drill a 23/32” hole and tap it with a 1/2″ NPT tap.  I don’t know what the diameter of the cable for your sens…[Read more]

That’s one of the older, now-discontinued Xbee models.  Have you used that module before or is it completely new and unused?  We had many of them die after about a year of service.  Did you modify the SJ19 solder jumper on the back of the Mayfly to change the bee status pin from the usual Bee pin 12 to Bee pin 13.  I see you have it listed cor…[Read more]

What modem are you using with this setup?

Can you email me at mayfly@envirodiy.org, I have a few other questions about the software libraries and hardware combinations for your setup.

Do you happen to have a spare Mayfly board, or any other Arduino-type board that you could run the sketch on?

The warnings you posted above seem to indicate that there’s a clash with the Sodaq DS3231 library.  Did you by chance happen to install that library separately into your Arduino/libraries folder?  ModularSensors already includes its own version of the DS3231 library which will conflict with the Sodaq library if they both exist on the same computer.

Are you trying to use the that NoCellular sketch as-is, or have you modified it before attempting to upload it?

The unzipped folders go into your MyDocumenrs/Arduino/libraries folder.  Make sure they aren’t nested within a second ‘libraries’ folder within the first one.  What version of the IDE are you using?

A good way to check that your libraries are installed correctly is to look at the built-in examples.  In the ARduino IDE, go to the File dropdown me…[Read more]

Have you installed all the supporting libraries into your Arduino/libraries folder?  There should be either 32 folders worth of libraries, or 47, depending on whether you downloaded all the recommended EnviroDIY libraries, or just the ModularSensors dependencies.

Have you tried measuring the voltage being applied to the sensors by using a voltmeter when the channel scanning sketch is running?  For the turbidity sensor’s screw terminal board, put the voltmeter’s red probe on either of the V+ screws, and the black probe on either of the GND screws.  For the CTD sensor’s 3.5mm headphone jack adapter board p…[Read more]

In your 4th picture, it looks like the Grove cable plug may not fully be seated in the grove jack.  Not sure about any of the other ones since the angles in the photos didn’t show them well, but be sure that it’s pressed all the way into the jack.  And your second photo shows that your two SDI12 Grove jack voltage selection jumpers are both set t…[Read more]