Shannon Hicks

For anyone looking or an update on board availability: We sent a huge shipment of boards, kits, and adapters to Amazon almost 3 weeks ago, they received them a few days later but still have not processed them and added them back into their inventory. So we’re still waiting for that to happen, and the products will not show up on Amazon until…[Read more]

All of the data lines on the Mayfly run at 3.3 volts. The 2.2k resistors on the I2C lines are the pullup resistors that are required per the I2C design spec.

As stated above, I’m prepping the products right now for shipment to Amazon, so they should be available whenever Amazon receives them, processes them, and lists them as available on their system again. I have no idea how long their side of things will take, sometimes it’s only a few days, but lately it’s been more like a week or more. Amazon is…[Read more]

There’s also the possibility that the LTEbee adapter board is broken or dead. We’ve had a few rare instances of them not working due to a manufacturing defect on the first batch of boards. So if you’ve got another LTEbee adapter you could swap out, or get a carrier board for the Xbee LTE module, you can determine which is the dead part.

Are you using one of our LTEbee adapters between the Digi Xbee LTE module and the Mayfly board? https://github.com/EnviroDIY/LTEbee-Adapter

We received a shipment of new boards from the manufacturer last week, and I’m working right now on testing and packaging everything, so we’ll be sending them to Amazon next week and they should be available on there shortly after that.

We currently only have the option of selling via Amazon and shipping to US customers only, as it is limited by our Amazon seller account. We hope to one day have other options for all the international requests we’ve gotten, but don’t have any other official options right now. Our current Amazon inventory is also dwindling due to all the shi…[Read more]

Are you sure you need to use UART 0 for your incoming data from your deice?  The RX0/TX0 pins on the 20-pin header are directly wired to the main UART 0 of the Mayfly, which are the same pins that are used when programming the Mayfly board via your computer (using either the USB port of the FTDI header).  So if you have a device connected to R…[Read more]

I usually leave the ADS1115 in its default gain setting (which is 0.1875 mv per bit), which is more than sufficient for most measurements.  If you do that, you can easily calculate voltage by using these two lines:

adc0 = ads.readADC_SingleEnded(0);
voltage = (adc0 * 3.3)/17585.0;

If you’re using a voltage divider, you’ll need to add an…[Read more]

Amazon isn’t replenishing our inventory as fast as usual, and we definitely prefer people contact us directly for orders over 10 boards or kits so that we can leave the Amazon inventory for people who only need to buy a few at a time.  Email us at mayfly@envirodiy.org and we’ll see what we can do for you.

Sorry to hear you’re having trouble with your Mayfly logger power switch.  That’s one of the parts I thoroughly test on each board before we ship them out, to make sure there are no problems with the switch.  Occasionally we’ve seen them get flaky like that if the board has been in a moist environment (i.e. the inside of the enclosure was damp o…[Read more]

Cal, that’s an interesting find, thanks for sharing.  I have a couple test boards that I’ve always kept in mode 2 (AT&T) and they’ve never had a problem connecting consistently and instantly.  But we started changing the CP mode on most of our other stations last fall to allow them to connect to Verizon towers as well, and it seems like those a…[Read more]

That demo sketch is just a sample of how to talk to your sensors, there’s lots of stuff in there that you could trim out if you’re actually trying to collect data at a certain rate.  What type of board are you using?  Are you planning to store the data on a memory card or just print to the computer’s serial monitor?  There’s a 10-second delay on…[Read more]

That example goes through the list of available address to see if a sensor is attached that has a corresponding address, so it definitely takes awhile to go through the whole list.  You could rewrite it to only go through the addresses of your sensors and not the entire list.  But your sensors have a 600ms sample time (as stated in the d…[Read more]

A few years ago, we used to put SMA jacks with bulkhead fittings through the Pelican case and use an external weatherproof antenna outside the case.  But the signal loss caused by the extra coax and the bulkhead fitting caused more to lower the overall signal than just using a small antenna inside the Pelican case.   So unless we’re connecting a…[Read more]

The code and wiring depends on what kind of sensors you’re talking about connecting to the same pin.  Are you using sensors with SDI-12 or modbus communication?  Are these sensors already included in the many supported sensors in the EnviroDIY ModularSensors library, or are they unique sensors we haven’t used before?

Jim, the 2G modules in your stations is the GPRSbee, made by SODAQ.  You can order it directly from them on their webshop (https://shop.sodaq.com/gprsbee-rev7.html), and they ship quickly from the Netherlands.  They used to be available through other vendors, but not anymore, so we buy them directly from SODAQ.  It come with the antenna and po…[Read more]

What kind of carrier board or adapter board are you using between your PC and the Xbee LTE module?

Did you activate the SIM card with Hologram?  If the orange RSSI LED light isn’t coming on, then you aren’t getting any cell reception.  Once you do get cell reception, the orange LED will come on (and it’s brightness is indicative of the strength of the signal).  And a few seconds after the orange light comes on, the blue light will start bl…[Read more]

There are lots of different places you can send your data.  ThingsSpeak is just one of several sites available that offer different levels of hosting, depending on how many stations you have, how long they’ll retain the data, and how the data is displayed.  You can even create your own mySQL database and free graphing site like I did back at the b…[Read more]