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Hi James, great to hear someone else interested. I just got a “relative EC” working nicely and just gave them out to be deployed last week.

The “relative EC” is to be able to measure stream disconnect. For the <<dry>> hot climate we have in California, looking to monitor when the stream goes dry.

There is no reason why it can’t calibrated,…[Read more]

Hi Neil,

How did your experiment go?  Have you managed any field deployments?

I’m looking at options for developing a DIY conductivity sensor, to go along with DIY turbidity and depth/pressure.  Ideally it would be calibrated, but relative conductivity might be okay.

James

Our wiring looks to be correct. We talked with the folks at Meter and they had us test the voltage across the board which seemed fine. They are sending us an independent tester to see if it is an issue with the sensor itself.

Check your wiring, the Meter group CTD sensor has a red wire for the data (signal) wire, white is positive voltage, and black is ground. It’s kind of backwards from most common DC sensor wires where red is usually the voltage supply wire. I’ve confirmed with the folks at Meter that the sensor works just fine at 3.3v.

I have come up with an inline  plug-in circuit that will do the voltage shifting ( and  generate a +12V power and ESD protection)  that I’m working on, so just mentioning it here. If anybody is interested in the discussion we could take it to a separate thread.

Just an FYI,  as I understand the SDI-12 spec, the receiving instrument should receive 3.5V for a ‘0’ or space.   The mayfly port is only capable of supplying 3.3V – so it may work for most SDI-12 instruments, and is working for one SDI-12 instrument I’m using

Typically with off-spec issues, things can work on some instruments and then not  on…[Read more]

Hi Sara,

I am having issues when I come to this step and can use a little help troubleshooting my issue. I cannot get my sensor to connect to an address. I have an SDI-12 sensor with bare wires connected to grove 4-pin terminal adapter set up just as you explained in the instructions. All of the connections seem secure, but when I run the…[Read more]

<p class=”user-nicename”>@armas

I can’t think of any one thing that may be wrong (internet service, formatting, etc) without seeing some of the data.
Could you maybe post some small samples of the files your are working with (raw – from the logger and processed – after Excel macros)?</p>
I found that the best way was to have the Mayfly output the…[Read more]

Oh, now I see the Mayfly protoshield: https://www.envirodiy.org/mayfly/hardware/accessories/. It happens to be out of stock at Amazon at the moment, but that’s OK, I don’t have an immediate need. It would work, but would also require adding/moving the Grove sockets to the protoshield if one still needed those.

I was implementing a TTL-based…[Read more]

There is a Mayfly Protoshield rev1 – but I can’t find if its for sale anywhere.

I have one, and no plans for it right now so if you wanted it I could send it to you.

The details are here, but no gerbers.  With gerbers it would be possible to order the base boards directly from o…[Read more]

Thanks Neil.

Initially I thought I could use screw terminals but soon realized that the male pins that protrude from them are not long enough to provide a secure plug-in to the 20-pin headers. Perhaps my best solution will be to solder screw terminals to a small perfboard or proto board, along with male headers which would plug into the 20-pin…[Read more]

I have been having similar problems uploading to the internet.  They seem to have become worse the last few months.

I make it a point not to change the original data file, I open it but don’t save it before closing.

I use an Excel template to create an upload file.  The template contains the first 8 rows of the upload file.  All I have to do to…[Read more]

Hi Matt,

There is  a Mayfly prototyping board, which I should have used for one project, and forgot to 🙂

I’ve prototyped with a basic 2×10 male to male header using wire wrap and soldering to the header. However I cut the 2×10 from a larger length I had, and it became unreliable pretty quickly.  For a cable maybe  0.05″ ribbon cable with IDC he…[Read more]

Yep, that was it. When I didn’t find the library in EnviroDIY, I just grabbed it from slashdevin’s original. Now that I have your fork of NeoSWSerial, it works. Thanks!

Oops, sorry that I missed this.

Are you using slashDevin’s original NeoSWSerial or are you using my fork? (It’s in SRGDamia1, not EnviroDIY.)  The original didn’t implement the peek function which would cause it to fail.

Any ideas why AltSoftSerial works here, but NeoSWSerial doesn’t?

Do people just use individual jumper wires to the Mayfly pins on these headers? Or is there a modular cable of some type that works with them?

Thanks for taking the time to answer me.

I did some others tests, and this became much weirder. So, I removed all the code about the LED display, and still not working (value stay on 0). So I tried connecting the LED display to see how it react, despite the fact there was no code about it. When I plugged the power and ground wire on their…[Read more]

The response is great.

For my WiFi/Xbee S6 accelerated updates 2min sampling update every 4minutes the ACK time over 700 POSTS time is between 200mS and  774mS.  All POST succeeding 1st attempt.

For my Verizon/Xbee LTE at 15minutes sampling the ACK time is typically 5sec, very occasionaly about 1.5sec, and also 7Sec. For this test it delivered t…[Read more]

Neil & Matt, thanks for that very good news from your testing!

I’m really glad to hear that everything seems to be working well again!!!