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Thank you for your reply.

I am following the instructions point to point. I was able to copy-paste the URL but I keep getting the same error. I use Arduino IDE 2.0.0-beta 4.

Are you following the instructions from the top of this page to add the Mayfly board to your IDE:  https://www.envirodiy.org/mayfly/software/

You should be able to copy-and-past the URL of the json file into the appropriate place in the IDE Preference window and then the IDE will fetch the file and load it properly.  We haven’t made any changes t…[Read more]

Thanks @shicks. COVID has meant that not everything is available at my end of the world, so I need to compromise sometimes!

That panel wouldn’t be a problem.  Any panel that produces 6v will be safe for the Mayfly, but some cheap 6v panels actually produce higher than 6v in direct sun, so you should measure it (under load) in full sun to make sure it won’t output higher than the max input voltage of the MCP73831 (7 volts).  The solar charger on the Mayfly boards v…[Read more]

Hi Dan,

I’m curious whether it’s possible to identify Gen 1 vs Gen 2 Hydros21; are they labeled? I’m wondering what I’ve got.

Thanks,

Matt

Thanks @neilh20. I will definitely be interested in these when they are available.

@aufdenkampe do you have any feedback about YOSEMITECH turbidity sensors? My questions are:

1) Are they as reliable as other turbidity sensors, i.e. do they drift more readily, or provide strange values? For $510USD (non-wiper) or $680USD (wiper), they seem…[Read more]

Are you using Windows or Mac for connecting to the Mayfly board?  Have you tried more than one USB cable?  Are these two unresponsive Mayfly boards brand new or are they running previously-programmed sketches?  Are there any LEDs that light up when you power the Mayfly board, either from a USB cable or a LiPo battery pack?  Is the small slide swi…[Read more]

I did forget that there should be a new port number to the logger, but, yes, it is not assigning a COM port number for two of our loggers.  Is there any reason why some loggers would be able to be assigned a port while others would not?

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

I’ve been working on a next revision board. Details at https://github.com/neilh10/SensorModbusMaster/tree/release1/hardware/knh002-MayflyWingShield

overview at https://github.com/neilh10/SensorModbusMaster/tree/release1/hardware

I don’t have any time frame on availability due to the world wide shortage of parts, but probably third quarter this…[Read more]

Those sensors use Modbus RS485 protocol to communicate with a host device, which the Mayfly logger can’t do natively do with its current hardware, so you’ll need to add either an aftermarket RS485-to-TTL interface board, or build one like Anthony (@aufdenkampe) has done.  He, and a few other people on the forum, have deployed some Yosemitech…[Read more]

Hi @shicks.  I need a number of turbidity sensors for an upcoming project, and I have a reasonable quote from Yosemitech (~510USD each).  What additional interface hardware are you referring to for the Yosemitech probes?  Has anyone tested them and can vouch for their accuracy?

We found that the USB Serial drivers did not install, this is where we found drivers –> D2XX Drivers – FTDI (ftdichip.com)

I’ve created a low cost monitoring console using a Raspberry Pi and FTDI cable. This allows a release debug OUTPUT to be monitored just as if it was on the console and compared to https://monitormywatershed.org/

https://github.com/neilh10/ModularSensors/wiki/Test-monitoring-host