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@mbarney just wondering did that work for you with the Mayfly1.0 .  Do you have any changes you made to the program. Many thanks

Changing the interval in that line should work, unless you’ve got something else in your code that’s’ interfering with that.  What example sketch did you use for your code?

As for delayed transmission of multiple samples, we haven’t felt the need to do that on any of our stations so it’s not a feature we’ve implemented in our code, but I think…[Read more]

Shannon I am using const uint8_t loggingInterval field and changed it to 10 min 30 min but it is still sending every 5 min to MMW. I wonder if there is another filed I am missing…also is ther a code to collect every 5 min but send every hour or so

Unfortunately, there’s currently no way to trim out unwanted datapoints from MMW, but perhaps @aufdenkampe can comment about future changes to the site that might allow this.

The transmission rate is determined by whatever you put in the sketch of your logger.  I don’t know what sketch you’re starting with, but if you’re using one of our examples that we include with the ModularSensors library, then there’s a line about 50 lines down that says this: const uint8_t loggingInterval = 5;

So 5 is the number of minutes…[Read more]

edit to the above email:  Sorry I don’t have any experience with the 12V batteries, or 12V to 5V.

I would note that the Mayfly1.0 charger is different than 0.5b, and I’m seeing that it wants a slightly higher+5V than the Mayfly 0.5b for it to do a 0.5A charge of the LiIon battery. I am using USB charging monitor “USB Meter” to monitor the charge…[Read more]

I’m also deeply into power analysis as the way of keeping everything going. I was working with some engineering students and got them to do a spreadsheet, which I modified and added and can be used to build a budget for the power that you think you need, and what the power consumers might be.  I then look for the major user of the power, and let…[Read more]

After struggling with power problems for years and buying several brands of 12v batteries and also using multiple batteries in parallel, I discovered I was looking in the wrong area.  The solution for me was to find where power was being used and replacing inefficient modules with efficient ones.  And the problems I found were surprising and p…[Read more]

Thanks for the schematic – that is helpful. I removed the solder blob using solder wick and re-added it to the res-div position, but it wasn’t pretty; it looks like I overheated the board a bit, but it still works. Later, I found a different technique in this video, which I’ll share here for anyone else who needs it.

Sounds like modifying your Grove cable to connect the resistor pair to your differential input is your best bet.  Here’s a schematic of the multi-purpose screw terminal board if that helps.  The gray area on the 3 solder jumpers in the schematic shows the default position of the jumpers.  If you’re putting resistors in R1 and R2, you’ll want to ch…[Read more]

FYI, Turner tech support tells me that Signal Ground and Supply Ground must be “Kept separate so that noise isn’t injected into the response.”

Thanks Shannon. I’m not positive that I need to use differential measurement… I’m approaching the edge of my knowledge as a non-EE. Turner doesn’t specify whether it’s OK to connect signal and power grounds to the same point — maybe I’ll ask their tech support. But when the sensor is on, I’m measuring around 13 mV between its signal ground and…[Read more]

Hi Matt, sorry I didn’t see your original post from last week.  You are correct in how the resistor divider works, we have several sensors that have a 0-5v DC output, so dividing it in half makes it safe to read with the 3.3v-based circuitry of the Mayfly’s ADS1115.  However, you can also use mismatched resistors to create a divider for s…[Read more]

After probing the screw term adapter, I don’t think that it will work for my purposes as I described above. If I’m correct, the way the adapter’s voltage divider works is this: When the S1 jumper is set to Res-Div and two matched resistors are installed on the S1 side of the adapter, the voltage output on the Grove’s D1 pin will be half of the…[Read more]