SGFulton

Hi James, we regularly had this problem when using the Decagon CTD-10s connected to a DIY Arduino Mega data logger. We ended up taking the median value of 10 measurements taken 1x/second every 5 mins. However, what eventually worked (if I’m remembering this correctly; this was my dissertation research done in 2016-2019) was clamping an RF ferrite…[Read more]

Hey Pat,

Thanks for your help…we’ve now been able to successfully register the FONA and ping the internet. We’re still not able to post to the internet though. I’m going to going to make anohter separate post for this question in the hope that others will also see it since it’s a new question.

Thanks again…perhaps you can shed some light…[Read more]

Hi Veronica,

I’d suggest looking at the Atlas Scientific sensors…they have one for measuring electrical conductivity across a range of salinities: https://www.atlas-scientific.com/conductivity.html. We’ve been using them with fairly good success for the last several years. They do foul rather quickly if there is iron in your system, and we’ve…[Read more]

Update: Got the proof-of-life (POL) code on the Mega to work using hardware serial on the Mega (Serial2) to communicate to the Pro Mini POL software serial (digital pins 2/3 RX/TX).

Thanks for all your help!

Stephanie

My new compile errors (verbose) are provided below; as you can see they’re similar to what I was getting before I downloaded the new SDI-12 library.

My apologies for asking very rudimentary questions. While I’ve been using Arduinos now for a couple of years, I am still very much a novice at C++, much less how libraries work, etc.. I’m in the…[Read more]

I tried updating the SDI-12 library but am getting similar errors. I’m still looking in to this, but am wondering whether I can use hardware serial ports on the Mega to communicate with software serial ports on the Mini?

Thanks for the oh-so-rapid responses.

Stephanie

Hmmm, now I don’t see where I saw the 2.5W reference. Perhaps I was mixing it up with the Sodaq Mbili. That’s good to know. At least one of the locations I’m intending to sample in the eastern KY coalfields, and possibly others at a different site here in GA, are very forested. I’ll have to try to run the solar panel out to a sunnier spot to…[Read more]

Hi, I note that the specs for the Mayfly state they only support a 2.5W solar panel. Here I see that you’re able to connect a 3.2W panel. How about a 6W panel (e.g., https://www.adafruit.com/products/1525) or 9W panel (https://www.adafruit.com/products/2747) or up to a 20-100W? We’re running Arduino Megas in the field hooked up to 12V marine…[Read more]

Dave, again, sounds interesting, but not sure LoRa would work for us. We’re monitoring water chemistry at a remote mine site in eastern KY and want to push the data out to the internet. LoRa sounds more appropriate for IoT in urban settings. From what I’m gathering, cellular seems like our best bet, and it’s going to have to a carrier that’s…[Read more]