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Shannon Hicks replied to the topic 12 V External Power and Serial Viewer in the forum Infrastructure and Equipment a year ago
You are correct, if you’re using the USB jack to power a v1.0 or v1.1 Mayfly using a 12v source, then there’s no way to interface the Mayfly with a PC for programming or viewing serial output. However, all Mayfly boards include an FTDI jack that allows you to connect a variety of FTDI cables or adapters in order to communicate with the board in…[Read more]
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Shannon Hicks replied to the topic 2022 EnviroDIY Hardware Status and Availability in the forum Mayfly Data Logger a year ago
It’s still in the prototype and testing phase, but the good news is the the chips that were unavailable for the past 18 months are finally available again. If you or anyone else have specific RS485 sensors that you’re hoping to use, it would be helpful if you email me at mayfly@envirodiy.org with your sensor model information so we can make sure…[Read more]
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
The only differences between the v1.1 revA and revB are this:
The ICSP jack was a 2×3, 0.5″ pitch male pin header on Mayfly v1.1 revA.
The ICSP jack is now uses Tag-Connect pads for use with Pogo pins for ICSP programming for the Mayfly v1.1 revB.And with the revA boards, there was a circuit design change after manufacturing that required me to…[Read more]
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Shannon Hicks replied to the topic How to determine battery and power supply in the forum Mayfly Data Logger 2 years ago
If you’ve got 4 heated sensors that require constant 12 volts, then I don’t think the Mayfly and the standard “battery/solar panel combo” is going to be sufficient. It would be a struggle for the Mayfly to supply the necessary continuous 100ma at 12v for the heaters, in addition to powering the various sensors intermittently. You could have a s…[Read more]
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Shannon Hicks replied to the topic How to determine battery and power supply in the forum Mayfly Data Logger 2 years ago
Sensors with heaters are another big challenge, especially if they run continuously. Are the heaters powered all the time, or only when taking a sample? Do they require 12v to operate, or was that spec just listing the power draw at 12v?
You can do some basic battery life calculations on this handy website: https://oregonembedded.com/batterycalc.htm
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Shannon Hicks replied to the topic How to determine battery and power supply in the forum Mayfly Data Logger 2 years ago
Standard practice is that when the Mayfly board goes to sleep in between measurements, it turns off all power supplied to the sensors and radio module. So the power consumed when sleeping is just the bare minimum to keep the Mayfly in sleep mode, which is usually a little less than 1 milliamp. There are ways to make it use even less in sleep m…[Read more]
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Shannon Hicks replied to the topic Widespread cellular network outage today in the forum Monitor My Watershed 2 years ago
It appears that the Hologram service interruption has been fixed and almost all of the cellular stations on Monitor My Watershed have returned to normal operation. If any stations don’t rejoin the network by later today, it might require a field visit to cycle the power or possibly replace the battery.
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Shannon Hicks started the topic Widespread cellular network outage today in the forum Monitor My Watershed 2 years ago
There is currently an issue with the Hologram cellular network that is used with most of the EnviroDIY stations with cellular modules. The network problem is preventing all Mayfly logger stations with Hologram SIM cards from being able to send data to the Monitor My Watershed data portal. Hologram is aware of the issue and apparently has fixed t…[Read more]
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Shannon Hicks replied to the topic Where to Find the Logger ID for Mayfly Data Logger in the forum Mayfly Data Logger 2 years ago
I’m not sure what the Mayfly Data Logger Pro is. Do you mean the program (or sketch) used to configure the board? If you’re using one of the provided sketches we publish on Github, there’s a couple lines in each sketch that looks like this:
// Logger ID, also becomes the prefix for the name of the data file on SD card const char* LoggerID = "…
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Shannon Hicks replied to the topic esp32-bee-wifi-bluetooth in the forum Infrastructure and Equipment 2 years ago
There’s a link to the schematic on the item page along with a link to an example sketch on Github.
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Shannon Hicks replied to the topic Mayfly version 0.5b data accuracy/validity in the forum Mayfly Data Logger 2 years ago
The CTD sensor you have is a digital output sensor, meaning all of the measurement happens onboard the sensor and it outputs a string of 3 numbers, all the Mayfly logger board is doing is capturing those numbers and storing them. If there was a problem with the Mayfly board, then you wouldn’t get the numbers at all, and there’s no calibration or…[Read more]
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
Reminder quote from the first post of this thread: If you’ve got a basic question such as what are the board’s features or how it differs from previous versions, this is the place to ask. If you’ve got a more complicated question or issue, then it is probably best to start your own thread. The goal of this thread is to be a great informati…[Read more]
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
The analog reference voltage (AREF) pin of the ATmega1284P is broken out to the left-hand 2×10 header if you wanted to apply a voltage other than (and less than) 3.3v. If you leave it floating and don’t specify the AREF in your code, then it’ll use the default 10-bit setting for any regular analog reading like you’ll find in most code…[Read more]
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Shannon Hicks replied to the topic 2022 EnviroDIY Hardware Status and Availability in the forum Mayfly Data Logger 2 years ago
LTEbees should be back in stock later this week in the EnviroDIY shop and in a week or two on Amazon. The big order we placed from our manufacturer back in March had some production delays but is supposed to be delivered this week. The RS485 adapter is still not ready for release, the original design relied on the 12v boost circuitry of the M…[Read more]
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Shannon Hicks replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 2 years ago
The Bee socket of the Mayfly board isn’t powered continuously by default, so in your code examples above, it appears that you’re not turning them on. If you study the schematic for whichever hardware version of the Mayfly you have, you’ll see that you either have to activate the power to the bee socket’s regulator by setting Mayfly pin D18 high…[Read more]
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
The ADC example I linked above from Sparkfun applies only to the onboard 10-bit ADC of the ATmega1284 processor. For the ADS1115 auxiliary ADC on the Mayfly board, the formula on the Sparkfun page does not apply, because the ADS1115 is a dedicated ADC chip and works differently. The operational specs of the chip are outlined in the TI d…[Read more]
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
The calculation for the conversion of analog bits to voltage depends on the operational voltage of the system (3.3v in our case) and the resolution of the ADC. You can see an example calculation (and more importantly, the formula used) for a 10-bit Arduino here: https://learn.sparkfun.com/tutorials/analog-to-digital-conversion/all
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Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago
The ATmega1284P processor of the Mayfly is similar to other basic Arduino boards with the 324P processor in that it has an internal 10-bit Analog-to-Digital converter (ADC). There are 8 ADC pins on the 1284P, so these pins can be used to read analog voltages, however at a pretty coarse resolution (1024 bits over the 3.3v sample range). But t…[Read more]
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Shannon Hicks replied to the topic Mayfly v.1.1 – Clarivue Turbidity Sensor in the forum Mayfly Data Logger 2 years ago
There’s nothing to unsolder. Solder Jumper SJ25 has 2 small pads. By default, they are separated and not connected at all, and that makes the on-board boost circuitry output 12 volts. By putting a solder blob on SJ25 and connecting the 2 pads, you add some extra resistance to the circuitry that controls the voltage and it’ll output 9 volts in…[Read more]
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Shannon Hicks replied to the topic Curious sensor failures and cyclical measurements in the forum Mayfly Data Logger 2 years ago
Have you tried disconnecting one sensor at a time and seeing how the other one performs? We’ve found that sometimes when one sensors fails or “goes bad”, it can cause erratic readings or performance of any other sensor that’s also connected. By unplugging each sensor independently, it’s usually easy to isolate which sensor was the actual c…[Read more]
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