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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
Shannon Hicks replied to the topic Purchased wrong solar panel? in the forum Mayfly Data Logger 1 year, 6 months ago
If your station is in an open location that gets several hours of direct sunlight every day, then a 2W panel is probably sufficient if you have a cellular modem on your station. The 2W panel is definitely sufficient if it’s just a Hyrdos21 sensor and no telemetry. But if your station is under tree canopy or is mostly shaded, the P105 model 5W p…[Read more]
nick replied to the topic Error Compiling for board EnviroDIY Mayfly 1284p in the forum Mayfly Data Logger 1 year, 6 months ago
I was getting the same error message as the poster above, so I went ahead and followed the instructions that Shannon provided to fix it (2025-01-22 at 2:07 PM), but now I am getting this error message that I attached. That is one of 10ish errors that I am getting.
When checking out the libraries folder, everything seems in order.
The previous…[Read more]
Elliot Ma started the topic Purchased wrong solar panel? in the forum Mayfly Data Logger 1 year, 6 months ago
Hi,
I bought the 6V 2 W ETFE solar panels from Voltaic to replace some 6 V 2 W solar panels we lost for our Hydros 21 setup. When I got them in the mail, I realized they were about half the size of the previous solar panels. I can’t tell from the specifications if they’re a sufficient replacement, would they provide enough power to power the…[Read more]
nick replied to the topic Continous HAB monitoring in the forum Mayfly Data Logger 1 year, 6 months ago
<p style=”text-align: left;”>I’m just connecting one Turner phyco c-flour sensor.</p>
I assume these resistor pairs are independent and shouldn’t affect how a single sensor reports.
<p style=”text-align: left;”>Thank you for the previous response regarding the cable glands.</p>
Shannon Hicks replied to the topic Continous HAB monitoring in the forum Mayfly Data Logger 1 year, 6 months ago
Are you trying to measure 2 analog signals from 2 separate sensors with just one 6-pin screw terminal board?
nick replied to the topic Continous HAB monitoring in the forum Mayfly Data Logger 1 year, 6 months ago
Shannon, I went ahead and soldered four 10k resistors instead of the two I originally said, similar to what you did here:
Does that still work for my purposes or does it change things?
Thank you.
Shannon Hicks replied to the topic Logger not transmitting data to website in the forum Mayfly Data Logger 1 year, 6 months ago
That happens occasionally when the connection between the Mayfly and the online time server gets terminated before the entire timestamp gets transmitted, resulting in an incomplete timestamp, and the Mayfly code has some smarts to check whether the timestamp it received is a valid, reasonable date. If you ever get this error, you can just…[Read more]
Jamie Anderson started the topic Logger not transmitting data to website in the forum Mayfly Data Logger 1 year, 6 months ago
I have a new logger that is recording data to an SD card but I get the below error and the logger will not transmit to the website.
“Current clock timestamp not valid”
I used this sketch: https://github.com/EnviroDIY/ModularSensors/blob/master/examples/DRWI_SIM7080LTE/DRWI_SIM7080LTE.ino
neilh20 replied to the topic Hydros 21 Depth/Conductivity During low temps in the forum Environmental Sensors 1 year, 6 months ago
Hi Jake, no “pressure sensor” is going to be able to be linear/accurate if ice is forming and expanding in the protective enclosure round the pressure sensor. My guess is the whole sensor would have to be specially designed to allow for the ice expansion to even survive a freezing event.
My hypothesis (guess) would be that its the nearly…[Read more]
Jake Lemon replied to the topic Hydros 21 Depth/Conductivity During low temps in the forum Environmental Sensors 1 year, 6 months ago
Thanks for your thoughts Neil.
These blips are occurring over the course of hours (roughly 4-6 hours from when depth starts dropping until it reaches it’s lowest point) though the time varies by occurrence.
They seem to be happening as temperature approaches the freezing point. I’ve attached a graph with temp for reference.