SGFulton – EnviroDIY

SGFulton started the topic Seeking recommendations for PCB fab houses in the forum Miscellaneous 2 years, 9 months ago

Hello! We want to make a small run (~10 boards) of a PCB board we’re using in a dissolved oxygen autochamber. I am new to the world of PCB manufacturing and working with Eagle so I’m barely familiar with the terminology, file requirements (e.g., Gerber files), etc. Thus please excuse my ignorance. I currently have a BRD and SCH file in Eagle (my…[Read more]
SGFulton replied to the topic Hydros CTD-10 Regularly Dropping Out (-9999) in the forum Environmental Sensors 2 years, 9 months ago

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]
SGFulton posted a new activity comment 5 years, 11 months ago

Thanks for the notification. I did receive such a request (which is why I logged in tonight) but now I’ll just ignore it.

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SGFulton started the topic 3G FONA not posting to web using AT commands in the forum Infrastructure and Equipment 6 years, 4 months ago

Hello,

If anyone could shed some light on which AT commands we’re either using incorrectly or missing altogether, we could greatly appreciate any assistance you can offer. I’ve posted before re: 3G FONA but we’ve run across a new problem. We’ve been successfully using the 2G FONA 808 cellular modem with a Ting 2G Sim card from Adafruit here in…[Read more]
SGFulton replied to the topic Anyone used the Adafruit 3G FONA or other 3G cellular modem? in the forum Infrastructure and Equipment 6 years, 4 months ago

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]
SGFulton started the topic Anyone used the Adafruit 3G FONA or other 3G cellular modem? in the forum Infrastructure and Equipment 6 years, 6 months ago

Hi,

This past May I finally deployed 4 of 6 sensor nodes as part of an Arduino-based wireless sensor network collecting hydrogeochemical data at my research site in the remote coal fields of eastern KY. Historically (like 12-18 months ago?), we’ve been able get a connection up on the ridge at the site with the Adafruit 2G FONA (SIM808) paired…[Read more]
SGFulton replied to the topic Small conductivity sensor needed – any ideas? in the forum Environmental Sensors 6 years, 8 months ago

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]
SGFulton replied to the topic SDI12/Software Serial library conflicts: Arduino-based data logger in the forum Other Data Loggers 6 years, 9 months ago

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
SGFulton replied to the topic SDI12/Software Serial library conflicts: Arduino-based data logger in the forum Other Data Loggers 6 years, 9 months ago

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]
SGFulton replied to the topic SDI12/Software Serial library conflicts: Arduino-based data logger in the forum Other Data Loggers 6 years, 9 months ago

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
SGFulton started the topic SDI12/Software Serial library conflicts: Arduino-based data logger in the forum Other Data Loggers 6 years, 10 months ago

Hi,

We are developing a data logger to collect climate, water chemistry (Atlas Scientific sensors) and water level data (Decagon CTD-10). We are using the Arduino Mega as the primary data logger with a separate “proof-of-life” (POL) system (read below in next paragraph) on a separate board using an Arduino Pro Mini programmed as an Uno. Water…[Read more]
SGFulton posted a new activity comment 7 years, 4 months ago

Sorry, will do.

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SGFulton posted an update 7 years, 5 months ago

Hi Shannon,

Stephanie Fulton again. I was wondering how often you read the Decagon CTD-10’s using the SDI-12 library when you’re datalogging? We’ve been running them here in the lab to test the accuracy using Arduinos (Megas and Unos primarily) and the SDI-12 library. However, we’re taking a measurement every 5 seconds and averaging over 5…[Read more]
- Sara Damiano replied 7 years, 4 months ago
  
  I think right now we’re taking 10 readings very quickly (as fast as the CTD can) and averaging them. Then we repeat that every 5 minutes.
  - Sara Damiano replied 7 years, 4 months ago
    
    Also, please post questions like this to the forums instead of as a personal update.
    - SGFulton replied 7 years, 4 months ago
      
      Sorry, will do.
SGFulton posted a new activity comment 7 years, 9 months ago

Shannon, I am currently testing the SDI-12 code to connect a Decagon CTD-10 to an Mbili board. According to their specs, they use the same processor (ATmega1284p) and clock speed (8 MHz) as the Mayfly. Using only a “carriage return”, when I hit “send” I get the following back in the serial monitor…[Read more]

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- Shannon Hicks replied 7 years, 9 months ago
  
  Try changing your CTD address to “1” or anything other than 0. The sensors sometimes give slightly different outputs when they are configured as channel “0”. If that doesn’t fix it, I can send post some sample code that I use for interacting with the CTD sensors. However, we are currently in the process of rewriting most of our libraries in…[Read more]
SGFulton replied to the topic Dying battery in winter solved by 3.5 W solar panel in the forum Mayfly Data Logger 7 years, 10 months ago

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]
SGFulton replied to the topic Dying battery in winter solved by 3.5 W solar panel in the forum Mayfly Data Logger 7 years, 10 months ago

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]
SGFulton posted a new activity comment 8 years ago

Any idea when your Github site will be up and running?

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- Shannon Hicks replied 9 years, 5 months ago
  
  Our Github site is already active, you can see it here: https://github.com/StroudCenter
  
  But I haven’t written up a tutorial for this sensor display project yet. If you’re good with code and the LCD hardware, take a look at the SDI-12 library examples and you should be able to replicate it pretty easily.
SGFulton posted a new activity comment 8 years ago

Shannon, I would love a copy of your example code for both SDI12 and serial for the Decagon sensors. I’ve got several CTD-10’s that I”m including in a wireless sensor network and would like to use them with an Arduino Mega, but we haven’t worked with SDI12 yet. Thus the code would be greatly appreciated.

Thanks,
Stephanie

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- Shannon Hicks replied 8 years ago
  
  If you’re using CTD-10 sensors, you’ll need a way to connect their 3.5mm stereo plug to your Mega. Once you’ve done that, the code is pretty straightforward. I recently posted an example sketch (http://envirodiy.org/topic/arduino-datalogger/#post-1834) that polls 6 different Decagon 5TM soil moisture sensors that are all connected to the same…[Read more]
SGFulton posted a new activity comment 9 years, 3 months ago

Hi Rick, I’m not sure if this is what you’re looking for since I can’t tell if you’re looking for a housing for your sensor or just the board itself. Check out Atlas Scientific…they have some sensor pipe fittings that can be screwed on to PVC pipes that house sensor heads:

http://www.atlas-scientific.com/components.html

In particular,…[Read more]

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- Rick Vogel replied 9 years, 3 months ago
  
  I was thinking something more along the lines of this:
  http://www.directindustry.com/prod/rotronic-ag/product-14766-367465.html
  ….but just the empty housing so you could place your own electronics and sensor group inside.
  - Rick Vogel replied 9 years, 3 months ago
    
    ….or like the dark gray one on the sensor group homepage
    http://envirodiy.org/groups/sensor-developers/
SGFulton replied to the topic Beyond 2G cellular modems? in the forum Infrastructure and Equipment 9 years, 4 months ago

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]
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