Shannon Hicks

We’re eagerly awaiting the new Campbell turbidity sensors which should be available in late spring or early summer.  In the meantime, there aren’t any other low cost, high quality turbidity sensors that easily interface with the Mayfly except for the Yosemitech ones, which we’re still evaluating for long term performance reliability and…[Read more]

What is the battery voltage that your Mayfly is recording in your data file?  We’ve had a few random failures of a mosfet on the board that will cause the Mayfly to read the incoming Lipo or USB voltage as being much lower than it really is (see this post: https://www.envirodiy.org/topic/innacurate-lipo-battery-voltage-data/).   Your logger co…[Read more]

You might try using a new SIM card or a new LTEBee module.  We’ve had several of them stop working recently for no reason at all.  Sometimes using a brand new SIM card will fix the problem, but other times it requires using a new LTEbee module.  We haven’t determined the cause of the failure yet, nor a solution to get them working again.

There’s no reason to remove the CR1220 coin cell battery before shipping the board.  You’re not able to ship loose batteries, or larger multi-cell batteries, but it’s okay to ship one watch battery if it’s installed in equipment, such as being inserted into the Mayfly’s battery holder.   Don’t ship more than one at a time, and protect the Ma…[Read more]

We finally received the Mayfly boards and other accessories, so we’re working to get everything tested, packaged, and shipped to Amazon as quickly as possible. Everything will hopefully be available online again by this weekend or early next week.

All the starter kits I sent to Amazon at the beginning of the month sold out within a few days of being back in stock. I’m still waiting on the shipment from the manufacturer to get all of our products back in stock on Amazon. The holidays kind of mess up the schedules. I’ll post an update whenever I have an estimate on when everything will be…[Read more]

We usually use the MB7389 because it has the proper filtering for looking at a single target such as water, and has TTL output, so it’s easy to read with the Mayfly. They make lots of other versions, depending on whether you want to look at snow, or people, or multiple objects at once, and with different outputs (TTL, RS232, PWM, analog, 4-20ma).…[Read more]

I deployed several sensor stations in a coastal estuary with brackish water in southern Delaware about 5 years ago. There’s no difference between those stations and any of the ones we put in fresh water except that we used titanium-body turbidity sensors instead of stainless steel. The other sensors were all rated for salt water use, and I used…[Read more]

Thanks for the additional information, I appreciate you helping us out with this. I’ll send you a PM about what to do next.

Sara is probably the best one to comment on the code aspect of your question, but hardware-wise, you might want to try a different pair of pins for connecting the sensor. D19 is used as the status pin of the Xbee socket, and is used in all of the code examples we use for radio, wifi, and cellular telemetry. D18 is kind of reserved for being used…[Read more]

Yes, this is a known issue that I’ve seen with only a very few boards recently where we see those exact same incorrect voltage readings around the Q1 mosfet. I haven’t tried replacing parts to see whether it’s the mosfet or the D3 diode, but it’s definitely either one of those, or possibly both of them. I’ll see if I can experiment with some bad…[Read more]

We’ve completely run out of them because of all the requests for starter kits lately, plus our own flurry of logger assembly and deployment this fall, but as soon as we get more in stock we will be listing them for sale on Amazon as a separate item by themselves.

Update: I shipped some kits to Amazon this evening, so they should be available again by this weekend or early next week. The LTEbee adapter boards will be a longer wait though.

We are temporarily sold out of both right now but will hopefully get more in stock soon, though I don’t have an estimated date for that yet.

Yes, there’s a quick guide to using the GPSbee listed on the Accessories page.

I don’t think there’s an automatic way to show that in MMW, but for my rain gage loggers, I just have the Mayfly keep track of the cumulative total for the day, starting at midnight local time. And every 5 minutes, the Mayfly sends the cumulative total, and then at midnight, the Mayfly resets the total back to zero and starts again.

This question has come up fairly frequently, most recently here: https://www.envirodiy.org/topic/minisd-card-slot/

We just haven’t had enough demand to warrant selling them separately since the majority of people buy the starter kits.

Yes, you can email me at mayfly@envirodiy.org