dan@wachusett

Matt,

Sorry for the delayed response. You probably have the Gen 1 Hydros 21 sensor since the Gen 2 is brand new and I think I may have been the first one to get it. In fact, I can’t even use it yet because the ModularSensors library needs to be updated to handle some of the updates to the communications protocols. My Gen 2 has a black cable and…[Read more]

Hi Scott, I look forward to seeing your test results. Meter Group exchanged my Gen 1 Hydros21 with a brand new Gen2. I am programming it right now and will post new results after I test it. We are gearing up to expand our Mayfly network and I want to make sure we are using a dependable sensor before we purchase several units.

Dan

My experience with Hologram Pilot Plan on the 2g network was as follows:

3 parameters (Conductivity, Temp, Depth) returned in addition to DateTime @ 15 minute intervals

Average daily use = 715 B per day.  As an example we used 1.34 MB in the month of March 2020.

So for 1 station the cost is easily < $20 per year (in the pilot plan). However,…[Read more]

Brian,

I rebuilt the project with ModularSensors Library version 0.23.11 and it worked! I don’t really know what all the differences were between versions, but I did notice a couple of things that may have been the cause (though maybe not, I really have no idea what most of these settings mean)…

I Removed the suggested build flags from my…[Read more]

I was able to compile and upload the sketch using PlatformIO on Atom, however the Response Code 504 persists. I used the ModularSensors Library version 0.23.16. Since the data is being written to the microSD card and the 2G cell modem is sending the data to EnviroDIY, I am out of ideas on why the EnviroDIY host is not able to take the data. I…[Read more]

Brian,

Other than your Response code [201], the only difference I see between my output and yours is that you use a 6 hour offset from UTC, while I do not. I know my data is being transmitted because I can see the event in the activity log on my Hologram IO account. Did you use Arduino IDE or Platform IO? Would that make any difference in how the…[Read more]

That was a good suggestion Brian. I updated my ModularSensor library from GitHub to version 0.23.16. I am still getting the 504 Response code however:

09:00:16.719 -> Sending data to [ 0 ] data.envirodiy.org
09:00:17.656 -> POST /api/data-stream/ HTTP/1.1
09:00:17.738 -> Host: data.envirodiy.org
09:00:17.738 -> TOKEN:…

[Read more]

Yes, the board seems to perform just fine while only 1 card is inserted. There are most definitely electrical irregularities when 2 cards are in at the same time! I had erroneously assumed that the horizontal card was for uploading sketches and that data would be logged to the second (vertical) microSD card, which could be extracted easily to…[Read more]

Yes, this is a brand new board.
The microSD card is not the issue – I have switched cards and get the same result. Both cards work fine if used alone.
I believe the problem lies in the circuitry between the two SD card slots… When only 1 card is inserted (either slot) the board powers on. If both slots have microSD cards inserted simultaneously…[Read more]

I was able to fix the issue, though I’m not sure at all why it worked. When I have a microSD card in extra slot for datalogging the Mayfly board will not even power up. As soon as I pull the microSD card out the LED lights blink, the red one stays on and all is well. This seems to be a rather serious issue since the entire purpose of the mayfly is…[Read more]

Update…
After some searching on other forums it seems the sketch upload error is just a communications error. Is there any reason why I have previously been able to upload sketches to my board and send output to the serial monitor, but now I cannot? Could it be a driver issue?

I did not install the FTDI virtual COM port (VCP) driver because…[Read more]