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@selbig Wow thanks for sharing that. I’ve been thinking about BT for some time… and hadn’t seen how far it has come. There is also Blue Tooth Commander App  for Android  – so good for all types.

I’m just wondering how you are powering it.?

On powering, I’m really looking that it needs to be able to use low power, and then turn on when the C…[Read more]

All bare-board electronics such as the Digi LTE cellular board and the EnviroDIY Mayfly are sensitive to static electricity and theoretically they could be damaged if you aren’t careful.  That said, the Mayfly is pretty hardy and I haven’t experienced any problems after handling multiple thousands of boards over the last few years in all sorts of…[Read more]

We used to sell the 6-pin screw terminal boards on Amazon, but don’t anymore.  We do offer a 5-pack in our EnviroDIY ship page if you want to buy 5 all at once:  https://www.envirodiy.org/product/envirodiy-grove-6-pin-screw-terminal-adapter-pack-of-5/

Otherwise as Beth said, you might be able to use a regular 4-pin screw terminal board that is w…[Read more]

Perfect. Go with a 4 pin. The 3.5 mm jack only has 4 pins/connections over the length of the jack. Here’s a photo that might help. You can find a lot about how these are mapped for audio (left, right, mic, ground) and they are mapped differently for iPhone vs other manufacturers.  https://cdn.sparkfun.com//assets/parts/7/5/4/6/11570-04.jpg

I don’t know, I’m just going off of the parts list that I have. It may, since the sensor only has 4 wires.

Since that has 3 ground lines, wouldn’t a 4-pin work?

Another question now that I have this part it specifically says not to open it “except at a static free workstation”.  Will a concrete floor and a discharge prior to opening the bag work?

That’s great!  I’m sorry, I was imagining you had the entire set-up, Mayfly and all, running on batteries and sealed under water

You should be using the same modbus address that you use when connected to the computer.

Looking at the datasheet again, I told you the wrong connections.  I’m sorry.  Only Y/Z are available in half-duplex mode, not A/B.  So you need to move A->Y and B->Z.  Turn off the Y/Z termination dip switch (I think).  I also told you the wrong pins for…[Read more]

Hi Sara,

Again thank you for your help, I am supplying the Y4000 from a dedicated power supply and I have done all the code instruction you gave earlier.

The code is working. However, the sensor is not responding back as you can see in the attached picture. I thought it might be a grounding issue so I have connected the grounding from the sensor…[Read more]

Thanks Shannon!

Thanks for the input. I got it figured out. It’s a pretty sweet arrangement that will make life easier for data collection. As @neilh indicated, the Mayfly logger, bluetooth HM-10, battery, and all wires will be in a waterproof box above the water with the sensors in the water below secured to channel iron or some other rod. There’s an app called…[Read more]

Hi @selbig an interesting idea.

I’ve been thinking about unattended access (of just equipment monitoring) and BT (low power) would be pretty nice. However as you are seeing there is a lot of complexity and some history with BT protocol versions that makes a simple concept a bit challenging.  Sounds like for some reason BT is not associating with…[Read more]

You’re not “overwriting” the serial connection.  The USB connection on the SAMD21 is a bit touchy and will fail if anything in the program fails.  In you’re program in lines 117 and 119 you’re calling Serial.println(...) and asking it to print the results of a function that returns void.  That’s most likely causing the crash.  It probably wou…[Read more]

Hi Sara,

Thank you very much for your help, I actually have a Y4000 and I have managed to communicate to it and use it connected to a PC, I am trying to monitor a near river.

I tried to work as you have written earlier, the problem is it looks like I am overwriting the serial connection to the PC, so the second the code uploads the USB…[Read more]