Shannon Hicks

I sent you some code last year that should work with the Y511-A.  I can’t tell what other changes you’ve made to the code, but in snippet you posted above, the address should be 0x01 on line 7, not 0x02.

When you did the address changing sketch, did you get a positive result using the serial monitor that showed the channel was changed to something other than 1?  Sometimes there’s a glitch where you have to set the channel twice before the change actually happens and it stays on the new channel.

What sketch are you using for the logging sketch…[Read more]

Did you do the example “b_address_change” sketch first, to change the sensor’s default channel from 0 to 1?

They are actually Turner Designs Cyclops-7F sensors that we use for measuring chlorophyll and phycocyanin  (https://www.turnerdesigns.com/cyclops-7f-submersible-fluorometer).  They are supported by the ModularSensors library and there’s more information about them here:  https://envirodiy.github.io/ModularSensors/group__sensor__cyclops.html

That’s a good question, and something that I’m sure a few other people have accidentally done before, me included.  Luckily the charger chip and the Mayfly v1.0 and v1.1 board should not be affected by having a solar panel connected with the wires reversed.  I just did a test here with a Mayfly v1.0 and a v1.1, where I first connected a panel w…[Read more]

I’m not familiar with the new C model, but I did use the older, now-discontinued one awhile back.  Without digging into the manual and the library too deep, I’m guessing it might be an I2C address issue?  The old model used 0xB8 whereas the new one uses 0x38.  So go into the ModularSensors/src/sensors folder and edit AOSongAM2315.cpp, find line 34…[Read more]

That’s not much current, so most relay boards should be able to handle that with no problem.  I think that latching Grove board (https://www.seeedstudio.com/Grove-2-Coil-Latching-Relay.html) would probably work good for your situation so your Mayfly board could activate the relay 15 minutes before you want to sample, and then go back to sleep and…[Read more]

What’s the current draw of your heaters?  There’s a variety of relays you could use, but I know several people have had good luck with various Grove-compatible relay boards, like the ones from Seeed.  But your options are going to depend on how many amps of current the heater draws from the battery.

Have you tried a different microSD card?  Either it’s a defective card or sometimes one or more of the pins in the microSD card socket can get damaged when inserting a card and cause a short-circuit inside the socket that prevents the Mayfly from operating properly.  Are you using the onboard microSD socket on the Mayfly board, or the optional v…[Read more]

Sensor values of -9999 for the Hyrdos21 CTD sensor mean that the Mayfly board isn’t hearing any communication from the sensor.  Did you carefully follow all the directions in the Monitoring Station Manual (specifically section 6) for preparing and programming a Mayfly for use with the Hydros21?  The sensor’s default SDI12 channel number needs to b…[Read more]

The UUIDs for the various parameters are generated by the MonitorMyWatershed website.  When you created the site for your particular station, you had to manually add whatever parameters you were interested in receiving from the Mayfly logger.  It looks like you added the 3 parameters for the Hydros21 and one turbidity parameter for the OBS3 s…[Read more]

Did you download the libraries.zip file correctly from this page carefully following the instructions in the Readme:  https://github.com/EnviroDIY/Libraries

and then confirm that all 42 folders are in your Arduino/libraries folder (not nested into a sub-folder called “Arduino/libraries/libraries”) and that the folders contain actual files are…[Read more]

The example code for a CTD/OBS3/SIM7080 station can be found here:  https://github.com/EnviroDIY/ModularSensors/tree/master/examples/DRWI_SIM7080LTE

The only changes you’ll have to make is to enter the turbidity sensor calibration information in the correct place (lines 157 to 186), give the logger a unique name in line 59, and enter your UUID…[Read more]

It’s likely that you deleted something important and that’s why the code isn’t working properly.  What sensors are you trying to use with your logger?

There’s a list of sensors currently supported by the ModularSensors libraries listed on the Github repo for ModularSensors:  https://github.com/EnviroDIY/ModularSensors?tab=readme-ov-file#supported-sensors-

Rather than create a new forum post for this issue, I’ll just add to this thread from last summer.

Today (January 22, 2024) there has been a widespread nationwide (USA) cellular network outage that has been affecting users of all the major wireless carriers, including the ones used by Hologram (the company that most of the EnviroDIY stations…[Read more]

We’d need more information in order to troubleshoot your problem.  Are you using an EnviroDIY Mayfly board, and if so what hardware version do you have?  What cell or wifi board are you using?  What Arduino sketch are you using on the board and are you using it mostly as-is, or did you rewrite any part of it or the supporting libraries?

I found a schematic in your github repo, my suggestion would be to power everything external to the Mayfly with its own beefy power source, especially the relay bank.  It looks like you’re currently using the main 3.3v regulator of the Mayfly to power the relays and maybe some other things, which is probably what’s causing the brownout.  There’s a…[Read more]

What version of the Mayfly board are you using?  And how are you powering the Mayfly?  Is the Mayfly providing the power for the sensor and vacuum pump too, or is that from a different source?

You could also try putting an ammeter in line with the main battery (with no solar or USB connected) to monitor the current of the board during use.  When it’s sleeping, you should see a current of about 0.6mA  for your configuration.  If you measure a sleeping current above 1mA, then something is probably wrong, either the board isn’t properly sl…[Read more]