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Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water. 
Community Activity See all activity
marbles replied to the topic LoRa on Mayflys in the forum Mayfly Data Logger 2 hours, 45 minutes ago
Awesome! I will work on a set post.
Shannon Hicks replied to the topic LoRa on Mayflys in the forum Mayfly Data Logger 11 hours, 29 minutes ago
<p class=”isSelectedEnd”>Yes, absolutely—we’d love for you to share it! One of the best things about the EnviroDIY community is seeing the creative ways people adapt the Mayfly and develop new hardware and software solutions for their monitoring needs.</p>
<p class=”isSelectedEnd”>A post describing your LoRa implementation would be very hel…[Read more]
marbles started the topic LoRa on Mayflys in the forum Mayfly Data Logger 12 hours, 56 minutes ago
A few months ago I successfully attached a LoRa antenna to a Mayfly and send data over the decentralized Helium network. This results in lower upfront hardware costs compared to cellular modems, lower battery draws and transmission fees at around $0.00001 per message.
Would anyone be interested in learning how to set this up?
Sara Damiano replied to the topic Mayfly unit stop sending data to the online site in the forum Monitor My Watershed 1 day, 8 hours ago
For data you have on the SD card, you can upload it so that it appears online following these instructions: https://wikiwatershed.org/wp-content/uploads/monitor-my-watershed-quick-guide-uploading-data.pdf. NOTE: The instructions mention that there’s a file size limitation. That limitation no longer exists.
Sadly, though, if your data isn’t on t…[Read more]
TUBearRiver started the topic Mayfly unit stop sending data to the online site in the forum Monitor My Watershed 2 days, 12 hours ago
My Mayfly unit stop sending data to the online site on Sept 17, 2025. I just pulled the unit and brought it home and was able to pull data from the memory card for 8/12/2022 to 1/3/23 and 5/12/2023 to 1-21-26.
Nothing after 1-21-26 shows up and it is important to have this data due to it being the worst drought year on record. I have the mayfly…[Read more]
Shannon Hicks replied to the topic Negative turbidity readings in the forum Mayfly Data Logger 1 week, 2 days ago
The shield wire of the OBS3 sensor cable doesn’t actually connect to anything on the sensor, so it’s okay to leave that floating, especially if you’re just testing the sensor. The green and black wires both definitely need to be connected to GND or the sensor won’t work properly. Both the high range and low range should read around 0 NTU when t…[Read more]
nick replied to the topic Negative turbidity readings in the forum Mayfly Data Logger 1 week, 5 days ago
Thank you for the information. I will try the voltmeter for confirmation.
Can a 7-year-old OBS3+ turb sensor go bad if it has been sitting in a climate-controlled room? It was probably used only a couple of times for testing indoors but has been powered off for at least 6 years. I get a positive reading when exposed in the open air, but when I…[Read more]
Shannon Hicks replied to the topic battery size options in the forum Mayfly Data Logger 2 weeks, 1 day ago
It’s possible to use a battery that big, as long as the polarization of the JST connector is the same. However, we rarely have the need for a large battery with our standard stations with sensors like CTD, turbidity, or oxygen, even with cellular telemetry ever 5 minutes. If you use a really large battery, you have to make sure your solar p…[Read more]
Shannon Hicks replied to the topic Negative turbidity readings in the forum Mayfly Data Logger 2 weeks, 1 day ago
Those old Campbell OBS3+ turbidity sensors will either flatline or go negative when they fail. We started deploying dozens of that sensor model about 8 or 9 years ago and almost all of them have been removed from the field in the past few years due to failure. It looks like your station is 8 years old so you got more life out of it than m…[Read more]
nick started the topic Negative turbidity readings in the forum Mayfly Data Logger 2 weeks, 2 days ago
I am noticing negative turbidity readings (https://monitormywatershed.org/sites/NJJC1S/). The turbidity sensor is clean and is situated freely in the water column. I unplugged and replugged the turbidity’s grove cable. Everything in the logger box looks dry and fine. Is my sensor dead or are there other troubleshooting steps I should do? thank you.