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Thanks!  I just ordered two.  My four port sampler project uses 12V motors which draw about 0.4A so I guess that would be an option to use the 12V output and LiPo 3.7V batteries.

I assume this converter uses switching so it should be reasonably efficient.  I’ll le you know how they work.  Good old amazon – I should get them tomorrow!

That is correct, the Mayfly v1.0 and 1.1 boards do not have a separate external power input for 4v to 12v sources like the v0.5b boards.  This is because the main voltage regulator on the v0.5b board that accepted that wide range of voltage was discontinued by the manufacturer, and the new voltage regulator doesn’t accept that high of an input…[Read more]

Hi @shicks  I got my 5 pack of the v1.1 boards today and I noticed that:

• Removed External/Lipo slide switch since it’s no longer needed

Does that mean I can no longer power the Mayfly from a 12 V supply?  I have an application for water sampling and the pumps run on 12V and they are controlled by the Mayfly so I can power the whole system wit…[Read more]

Thanks, Shannon.

I’ll try to clean it up a bit this afternoon but I think the corrosion is pretty bad – based on the image.

I’ll keep an eye out on Amazon to see when the single boards become available.

Thank you again for your time and help.

Dave

The Adafruit CP2104 Friend has the correct 6-pin layout to work perfectly with the FTDI interface header on all Mayfly versions.  The attached photo shows one connected to a Mayfly 1.0 but you can connect it to the Mayfly v0.5b the exact same way. Give that a try and see if you’re able to communicate with the Mayfly board.  If not, it’s possible t…[Read more]

Hi Shannon,

We got the Adafruit adapter and sent it and the board to a local university where our intern is from to have the engineering dept. do the soldering.  A couple of issues came up.  One is that the pattern on the Adafruit adapter doesn’t match the screen printing on the board… but the bigger issue is that the artel/main chip looks l…[Read more]

A further note on developing a new interface over Modbus; is to then check that when its running the instrument is actually reporting well over that interface.

I’ve integrated an LT500 Modbus into ModularSensors – and the question now is how well does it perform. Does it actually report and work well. I’ve had this working well on the SDI-12, so…[Read more]

Thanks Shannon. I would not expect the mayfly to adjust for time zone and/or daylight saving time. The logger should record “absolute” time (plus offset), as you described. And that’s what should be recorded in the MMW database. It is then up to the display program, our webpage interface to MMW in this case, to calculate for the users time zone…[Read more]

@dan-wachusett   I’ve just done quite a bit more work with modbus protocol, including developing an InsituModbus and though I would share here what I found out.

What its shown me is that possibly for the Keller CTD, a baby step may be to o start with https://github.com/EnviroDIY/KellerModbus and modify examples/GetValues to see if you can pull t…[Read more]

If the communication works sporadically, it’s more likely to be an electrical issue than a code issue.  Coding issues *usually* cause it to not work at all.

The -9999 is the library’s value for a failed reading.  When you get in in SDI-12, it most often means the sensor didn’t respond or the response was garbled.  Because the Mayfly’s voltage (a…[Read more]

The instructions for manual installation on the https://www.arduino.cc/en/Guide/Libraries are telling you how to find the right location to put the unzipped folder.  Once you have the right folder, you cut and past the files.  That’s it.

To update libraries, the easiest way is to delete everything in the library folder and re-download.

Can you c…[Read more]

We went to https://github.com/EnviroDIY/Libraries and follow the instructions on that page in the section called “Installing Libraries in Arduino IDE”, you’ll save the libraries.zip file by right-clicking on the link in the text that says ” –>->link<-<–“ and then save the file to your computer that way. We extracted the file onto our computer. a…[Read more]

@sgfulton  Thank you!

I will give this a crack.

Regards,

James

This looks like a common database issue that usually gets resolved by a server restart, so maybe @aufdenkampe can comment on it?

I assume you mean the manual is pointing you to Github where you attempted to download the libraries?  If you go to https://github.com/EnviroDIY/Libraries and follow the instructions on that page in the section called “Installing Libraries in Arduino IDE”, you’ll save the libraries.zip file by right-clicking on the link in the text that says…[Read more]

Erik any board that has a  SAMD21 with a uSD/flashDrive and  external RTC DS3231 https://www.adafruit.com/?q=DS3231&sort=BestMatch is probably a good target for using with ModularSensors.  https://shop.sodaq.com/search/SAMD21/ and look for LTE cellular or other cell to match your local network.  LoRa seems unlikely to work with MMW but could pos…[Read more]