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Shannon Hicks replied to the topic Meter Hydros 21 address in the forum Mayfly Data Logger 3 years, 5 months ago
Meter Group sensors that use SDI12 protocol (like the Hydros 21) come from the factory with a default SDI12 address of ‘0’. Their sensors are programmed to output a serial data string containing the current measurement upon powerup if the address is set to ‘0’. Meter Group’s dataloggers all talk to their sensors like this. You can see it in ac…[Read more]
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Shannon Hicks replied to the topic 504 Response Code in the forum Mayfly Data Logger 3 years, 5 months ago
I saw this happen with someone recently who was having the same issue with data not showing up online and getting the 504 response code. Turns out it was a missing UUID in the list of sensor variables in the Arduino sketch. When there’s a mismatch between the string you send Monitor My Watershed and what it’s expecting, you get the 504 r…[Read more]
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Shannon Hicks replied to the topic Bizarre eTape Sensor Behaviour in the forum Environmental Sensors 3 years, 6 months ago
No, there is not a built-in voltage divider on the Mayfly to protect either the 1284p’s 10-bit ADC or the auxiliary 16-bit ADS1115 ADC input. The jumpers on the Mayfly that let you select the Switched 3.3 or Switched 5v only change the voltage that’s supplied to the Grove jack’s VCC pin. There’s nothing to protect the Mayfly’s ADC inputs fr…[Read more]
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Shannon Hicks replied to the topic Bizarre eTape Sensor Behaviour in the forum Environmental Sensors 3 years, 6 months ago
You didn’t state what board you’re using, but if it’s an EnviroDIY Mayfly board or any other board with a processor operating voltage of 3.3v, then you’re not going to be able to read a 5v signal. It’ll max out reading around 3.3v, and you’ll likely damage the ADC input if you run it for very long or exceed the absolute maximum voltage of the…[Read more]
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Shannon Hicks replied to the topic MayFly Kit/Bee Adapter availability in the forum Mayfly Data Logger 3 years, 6 months ago
The forum is very active, there have been 7 post in just the past 24 hours alone. Do you mean this particular thread? Almost all of our items have been in stock on either Amazon or our new EnviroDIY Shop page for several months now, but we recently sold out of LTEbee adapters on both sites because of a huge rush of large orders a few weeks a…[Read more]
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Shannon Hicks replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 6 months ago
If the “Switched 3v3” or “Switched 5v” is turned off, then nothing connected to those pins will be drawing power. But if your Mayfly board is not actually going into deep sleep, then it’s sitting in idle mode instead of actually sleeping, and that’s why it’s drawing 6ma. Wasn’t there some recent threads about how the I2C device was keeping the b…[Read more]
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Shannon Hicks replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 6 months ago
It sounds like your Mayfly is not actually going to sleep. An idle Mayfly will use around 6.5mA, and a sleeping Mayfly will use between 0.25mA and 0.5mA, depending on whether you’ve got a microSD card in the slot and the type of card. Here’s the power consumption results from Mayfly current tests:
Mayfly current when board is powered and i…[Read more]
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Shannon Hicks replied to the topic Mayfly low battery voltage readings in the forum Mayfly Data Logger 3 years, 6 months ago
Sounds like it might possibly be this issue: https://www.envirodiy.org/topic/innacurate-lipo-battery-voltage-data/
I’ve only seen it happen on a few boards since that post a couple years ago. The only fix it to replace the bad MOSFET transistor.
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Shannon Hicks replied to the topic PlatformIO error with MS 0.28.01 in the forum Mayfly Data Logger 3 years, 6 months ago
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It shows you’ve got “Arduino Uno” selected as your board type. If you’re using a Mayfly, you need to change that in the “Tools–> Board” menu. Once you’ve done that, also make sure you’ve selected the right COM port. All of this is assuming you’ve already added the Mayfly board to the IDE as a supported board,…[Read more]
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Shannon Hicks replied to the topic Connecting Bare Wire Sensor to Jack Adapter in the forum Mayfly Data Logger 3 years, 6 months ago
Thanks for the info Brian. I heard they were switching cable outer jacket colors soon, and a few of our workshop attendees last month received Hydros 21 sensors with black cable instead of the usual red, so I’m assuming the inner wire color changed too. Their soil moisture sensors also changed inner wire colors a few years ago, and the manual s…[Read more]
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Shannon Hicks replied to the topic Connecting Bare Wire Sensor to Jack Adapter in the forum Mayfly Data Logger 3 years, 6 months ago
For a Meter Hydros 21 sensor, check the manual that came with the sensor to double-check that they haven’t change the wiring colors lately, but the usual pattern is red is data, white is power, and black is ground. So connect red to D2, white to Vcc, and black to GND. For that screw terminal board, D2 will get connected to D7 if you plug the g…[Read more]
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Shannon Hicks replied to the topic Typical Mayfly Data Usage in the forum Mayfly Data Logger 3 years, 6 months ago
Data plan prices are kind of a hard thing to put an exact total on, since it varies depending on various factors the station owner can choose, like cell carrier and transmitting interval, but I can give example costs for our typical configurations and deployments. For example, most of our stations transmit around 10 parameters every 5 minutes,…[Read more]
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Shannon Hicks replied to the topic Case for Lower Threshold Voltage on Mayfly Stations in the forum Mayfly Data Logger 3 years, 6 months ago
We typically code our stations to cutoff modem transmissions at 3.45v, and file operations at 3.4v. The Mayfly will stop operating around 3.35v, so if you set your modem cutoff too low, then you’ll stop transmitting AND stop collecting data on the memory card at the same time. By setting the modem cutoff a little above the memory card logging c…[Read more]
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Shannon Hicks replied to the topic I2C and power management in the forum Mayfly Data Logger 3 years, 7 months ago
The jumper for selecting whether the I2C grove port is constantly powered or switched powered was not intended to allow the user to turn off I2C devices on that Grove port. I designed the board that way because I wanted to give users at 2 separate Grove ports that could be powered either continuously or switched, because the other 4 Grove ports…[Read more]
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Shannon Hicks replied to the topic Availability Grove 6-Pin Screw Terminal Stereo Jack Adapter in the forum Mayfly Data Logger 3 years, 7 months ago
Right, that’s why I’m thinking you just need a screw terminal to Grove board, and since you only need 4 wires, you can use something like this: https://solarbotics.com/product/29118/
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Shannon Hicks replied to the topic LTE-M1: Bluetooth, Cellular 4G LTE CAT-M1 (AT&T/Verizon) Availability in the forum Mayfly Data Logger 3 years, 7 months ago
All bare-board electronics such as the Digi LTE cellular board and the EnviroDIY Mayfly are sensitive to static electricity and theoretically they could be damaged if you aren’t careful. That said, the Mayfly is pretty hardy and I haven’t experienced any problems after handling multiple thousands of boards over the last few years in all sorts of…[Read more]
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Shannon Hicks replied to the topic Availability Grove 6-Pin Screw Terminal Stereo Jack Adapter in the forum Mayfly Data Logger 3 years, 7 months ago
We used to sell the 6-pin screw terminal boards on Amazon, but don’t anymore. We do offer a 5-pack in our EnviroDIY ship page if you want to buy 5 all at once: https://www.envirodiy.org/product/envirodiy-grove-6-pin-screw-terminal-adapter-pack-of-5/
Otherwise as Beth said, you might be able to use a regular 4-pin screw terminal board that is w…[Read more]
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Shannon Hicks replied to the topic LTE-M1: Bluetooth, Cellular 4G LTE CAT-M1 (AT&T/Verizon) Availability in the forum Mayfly Data Logger 3 years, 8 months ago
Yes, Digi-Key has over 4,500 of them in stock right now: https://www.digikey.com/en/products/detail/digi/XB3-C-A2-UT-001/7932027
Mouser only has ~350 right now and is slightly more expensive than Digi-Key: https://www.mouser.com/ProductDetail/DIGI/XB3-C-A2-UT-001
Note that Digi (makers of the cellular modem) and Digi-Key (an electronics d…[Read more]
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Shannon Hicks replied to the topic miniSD card slot in the forum Mayfly Data Logger 3 years, 10 months ago
Here’s an update for this topic: we’ve implemented the online shop here on EnviroDIY to sell 5-packs of various products, including the vertical microSD card adapter board. All prices include shipping (to US addresses only). Restocking items on Amazon has been extremely slow lately, so if anyone wants to buy Mayfly boards, kits, or ac…[Read more]
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Shannon Hicks replied to the topic Rain Gauge Tip Data Without Rain in the forum Mayfly Data Logger 3 years, 10 months ago
After thinking about this old code yesterday, I was curious about what actually happens if a tip occurs during a long delay period, like the 2-second delay on line 123 and and 2.5-second delay on line 125 (which are delays to give the Xbee 900mhz radio module time to successfully wake up and then finish its routine before sleeping). I p…[Read more]
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