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Hello!

Thank you for being so willing to help. I am using the Mayfly version 1.1 and the wifi/cell board is the Envirodiy LTE Bee. I am attempting to run the Modular Sensor code of Menu a la Carte on Arduino and have made some adjustments mostly in cutting out unnecessary sensors.

Thanks!

Congrats – nice to see.

I guess the fundamental problem of power management is still there and can bite any time the power drops – and then likely will require a site visit to get the site restarted. Getting enough power is a band aid to enable reporting readings. So long as the power supplied exceeds the power used by a good margin it works. :)…[Read more]

See attached, a picture is worth a 1000 words. This one has the 4400mAh battery. Installed the new micro sd card yesterday.

@jamesp  thanks for sharing. Interesting where the “banana skins” are to slip on.

Nice to know its got low quiescent current – end of last year I also  got the same  SanDisk Industrial MLC MicroSD SDHC UHS-I Class 10 SDSDQAF3-008G-I withs its specified Operating Temp Range: -25°C to 85°C , but haven’t measured its current 🙂

I’ve bought uSD with…[Read more]

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?

Turns out, it was the micro sd cards. We had two units with Sandisk Ultra 32gb cards, and two with different cards. One was a Sandisk “industrial” 8gb card, I forget the other one but it was an older 4gb card. The Sandisk 32gb cards use far more power — there is some info online but I don’t fully understand it. What I know is the Sandisk…[Read more]

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]

<p class=”user-nicename”>@srgdamiano do you by chance see where I am going wrong?</p>

Hello Shannon,

We are using version 1.0. The whole system is powered using a Voltaic brand 12volt battery. The voltage is stepped down via a DC-DC converter to power the Mayfly. The pump is powered by the battery and is switched on/off with a relay bank which is controlled by the Mayfly. The CO2 sensor is also powered by the battery, as it…[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?