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It’s hard to tell exactly what’s going on with your wires from the photo, but you should make sure your separate power supplies are sharing a common ground. If you’ve got 12v going to the sensor and 5v going to the board, you need to have the ground of both of those supplies (or batteries) connected to the same ground as the Mayfly.

Thanks for the reply,

Yes, I am working with Troy :). We have had some success with the decagon CTD, including using a wifibee and portable wifi hotspot to log data to monitormywatershed.org. It would be nice to have turbidity measurements as well, which is one reason we are interested in the Y4000 device.

In our y4000-mayfly setup, I have…[Read more]

Hello,

Thank you everyone for your help. These issues have been resolved.

You’re missing some rows of your header. That file will definitely not work.

At minimum, you need the text “Sampling Feature UUID: ” before that UUID and another row that specifies the UTC offset with the text “Date and Time in UTC-#” where # is your offset. You can put all the result UUID’s on the row with the feature UUID as you’ve done, as…[Read more]

@rachel.murray, that’s great to hear that you were able to get the YosemiTech Y4000 sonde working with our Modbus Mayfly Wing Shield and associated documentation. I developed all of that for a team at Winona State University in Minnesota, but I hadn’t been aware of anyone else trying to integrate the Y4000 with our EnviroDIY stack. So that’s…[Read more]

I edited your original post to put the code into the Code Snippet tool.

I check every one of the Mayfly boards thoroughly before they get sent out to Amazon, so it’s possible that one with an FTDI or USB jack issue slipped by since that’s the only part of it that I don’t check. Send me an email to mayfly@envirodiy.org and I’ll see what I can do…[Read more]

Since we are not using the screen any longer, I2C is also no longer being used.

No. If you are using either the DS3231 real time clock or the TI1115 analog-to-digital converter built into the Mayfly, you are using I2C. Both of those are I2C chips.

Hello,

Thank you for the information. I removed the unnecessary parts in my code, as we currently were not using the OLED screen. Since we are not using the screen any longer, I2C is also no longer being used. All switches on the two boards that were not working as well as the boards in the field are where they need to be, so that is likely…[Read more]

It’s possible that there is a short-circuit in the Mayfly, but this sounds more like a problem with your code or sensors.

When you’re posting code, please use the “Add Code Snippet” button. It adds coloring and formatting which makes the code much easier to read.

When you’re troubleshooting the boards, make sure to check the position of all of…[Read more]

I think the main problem right now is that the modem data session lasts about the whole length of the logging interval. The cell modem seems to stay on and connected too much.

You can also try dropping the minimum battery voltage for the modem to ~3.5. Shannon has suggested that, especially if the battery voltage is going down at night but is likely to be recharged once the sun comes out.

Drew-
I can’t offer any specific suggestions for your problems but I recognize some of the code that I used for a similar project to gather Electrical Conductivity (EC) data. I have attached my writeup on this project which includes my code. I have several of these stations deployed and some for almost a year and have not experienced any of the…[Read more]

OK, I see, thank you, that makes sense. I should be able to extend the time of >3.65V by increasing my logging interval from 5 to 30 min. I’ll keep that ‘attempt to re-send data’ project in mind as I gain experience and availability.

It doesn’t send the data from the gap because the ModularSensors library simply doesn’t have that functionality. It doesn’t attempt to re-send data. The data should be on the SD card, as long as the battery was still high enough to log.

I would really love to have that functionality in ModularSensors, but it’s not simple to implement and I just…[Read more]

I removed Sdfat from it and it did not work either. Should I try with sdFat library only?