Shannon Hicks

The yellow LED on the Mayfly board indicates when the battery is actively being charged. If the battery is fully charged, then the yellow LED will be off. What does the data card file say the battery voltage was when you experienced the issue of the yellow LED not being lit? The Red and Green LEDs near the battery jack are programmed to blink…[Read more]

Is the small jumper on the Mayfly board next to the Aux Analog grove ports switched over to 5v from it’s default 3v position? Did you verify that all of the sensor wires are connected to the right ports on the 6-pin screw terminal board? Red wire to Vcc, White wire to D2, Blue wire to D1, and the other three wires (black, green, and clear) all…[Read more]

That is an interesting part, but I agree that the most dangerous thing about using it is the possibility of having the metal part of the holder (which is connected to the negative or ground side of the board power rail) contacting something inside the Mayfly case and shorting things out.

We’re planning to offer a 5-pack of just the vertical…[Read more]

I sent more protoshields to Amazon earlier this week, so they should be available as soon as Amazon processes the incoming shipment.

Remote programming a datalogger has never been a priority for the type of deployments we usually do, because our monitoring stations require frequent maintenance visits to clean the sensors or perform other tasks at the station. The most common reason for reprogramming a board would be if you’re adding or removing a sensor, or recalibrating one,…[Read more]

I don’t know of anyone successfully programming a Mayfly board remotely. We didn’t design the board with that capability in mind, but we’re investigating that option for future board versions.

Thanks for the photo. The screw terminal pic looks fine, on pic of the Mayfly, it’s hard to see the jumper pins for the D6-D7 grove jack, but can you verify that there is a jumper (shunt) on the pins as seen in this photo.

Can you post a picture of your sensor wiring showing how it’s connected to the terminal board and also a photo showing how it’s connected to the Mayfly? Did you make any changes at all to the address changing sketch? I’ve personally used almost 500 sensors (CTD, soil moisture, conductivity, etc) from Meter group and have never had a bad one right…[Read more]

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.

Not sure why it’s not working based on what’s visible in the sketch you posted. But I’m guessing there’s something happening in the TM1637Display library that is looking for return data or confirmation from the display in order for the sketch to continue, so without the display plugged into your Stalker, the sketch hangs and stops, rather than…[Read more]

Matt is correct, the pullup resistors on the I2C bus on the Mayfly board are soldered to the board and can’t be disabled unless you want to unsolder them, which will cause issues if you try to use I2C devices on the Mayfly like the DS3231 clock or the ADS1115 aux A/D.

I just read through various manuals and datasheets for the K30 sensor, and it is technically possible to change the I2C address of the sensor, but it’s not easy so I wouldn’t suggest it. But the manual says the board also does serial UART output so you can just follow their example code for Arduino UART to modify it for working with the Mayfly’s…[Read more]

As Sara suggested, the issue is probably related to the SDI-12 address of the sensor. Meter Group ships all of their sensors with a default SDI-12 address of “0” (zero). They do this because it’s the channel their sensors need to be programmed to for working with their own brand of dataloggers. But Meter group sensors don’t respond to SDI-12…[Read more]

The Hologram network was back up and running early this morning, and there have been no further issues with their network today. All of the stations that lost connectivity on Sunday are functioning normally.

T-mobile is the only provider of 2G service that works with the GPRSbee modules that many people are using with the Mayfly, including about 40 stations managed by Stroud. T-Mobile plans to deactivate the network by the end of 2020, so anyone wishing to modernize their Mayfly’s cell technology will need to replace the GPRSbee with a 4G LTE board.…[Read more]

This is an equipment question and not related to MMW, so I’ll answer that in your other forum thread.

The station at Punches Run has been back online for several hours now. It has a 4G board on it. The cellular hardware is either 4G only or 2G only. The connectivity issues are occurring somewhere in Hologram’s system behind the scenes and I don’t know any of the details, other than all of our 2G stations are still offline, and some of our 4G…[Read more]

There was a major worldwide outage with Hologram yesterday that is still being resolved. You can read more about the details here on their status page: https://status.hologram.io/

So it’s not a MonitorMyWatershed outage, it has only affected EnvidoDIY stations with 2G modems, because none of our stations with 4G modems were affected. T-Mobile…[Read more]

Good news, Amazon finally processed the shipments and our items show up again in their system, but there will still be a delay until they’ve fully distributed within their warehouse network and start shipping them out. Also remember that if you want to purchase more than 10 of any of the items, we’d really prefer you to contact us directly at…[Read more]