_Main image above is by Suzanne McDaniel, and was taken at Island End River in Chelsea, MA, part of the Mystic River watershed. Suzanne's photo was one of the winners of the [MyRWA photo contest](http://mysticriver.org/photo-contest/)._ ## The Open Water Project The Open Water Project aims to - develop and curate open hardware and open software useful for water-related applications - build and facilitate data infrastructures that allow for easier sharing of water data - encourage the growth of communities focused on 'free and open' approaches to water science - support ongoing work by grassroots communities interested in their own local water quality issues To this end, we've been focusing on several initiatives, in particular: **The RIFFLE: An Open Source Datalogger.** We are working to develop an open source hardware datalogger that can be placed in the field for extended deployments and measure common water parameters like: - temperature - conductivity - depth - turbidity The main Public lab wiki for this device is [here](http://publiclab.org/wiki/riffle). For recent research and descriptions of projects, you can search for 'riffle' on Public Lab, via [this link](http://publiclab.org/search/riffle). **The Coqui: using audio as a sensor data format.** We're also exploring using audio frequencies to convey sensor readings -- like a modem, but even simpler -- in order to make sensor readings more accessible for people (or to enable data transmission over ubiquitous audio jacks on PCs and smartphones). Read more about this idea on the [Coqui wiki](http://publiclab.org/wiki/coqui), or look for recent updates on Public Lab [here](http://publiclab.org/search/coqui). **A mailing list.** Sign up for the [plots-water-quality email list](https://groups.google.com/forum/#!forum/plots-waterquality), and participate in discussions about low-cost, open source water quality monitoring tools and techniques. [![riffleStraightUp.png](https://i.publiclab.org/system/images/photos/000/012/225/medium/riffleStraightUp.png)](https://i.publiclab.org/system/images/photos/000/012/225/original/riffleStraightUp.png) [![Riffle-ito.png](https://i.publiclab.org/system/images/photos/000/012/226/medium/Riffle-ito.png)](https://i.publiclab.org/system/images/photos/000/012/226/original/Riffle-ito.png) [![riffleLabel2.png](//i.publiclab.org/system/images/photos/000/014/362/medium/riffleLabel2.png)](//i.publiclab.org/system/images/photos/000/014/362/original/riffleLabel2.png) ##Fracking and Water Quality + Runoff There are also unique water issues related to frac sand. To get some background information and to explore options for addressing water issues as they relate to frac sand mining in your community, [head on over to the frac sand wiki page](https://publiclab.org/wiki/frac-sand). ## Community Projects We'd also like to use this wiki as a place to post links to other projects that embody an 'open science / open source' approach to hydrology and water technologies. Please add your links below! - InfoAmazonia Network: http://publiclab.org/wiki/infoamazonia-network...
Author | Comment | Last activity | Moderation | ||
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zengirl2 | "Glad you posted here as you know I'm a fan of the project. :) " | Read more » | over 7 years ago | |||
cfastie | "I haven't used the Pi NoIR cam and have not seen your photos, so I can only respond from general principles. Camera sensors are not as sensitive ..." | Read more » | over 7 years ago | |||
warren | "Just wanted to say this looks really cool! " | Read more » | over 7 years ago | |||
ramarro | "@shanlter i think that DFR EC will be better than what i use, at least after a brief look to the circuit. i will order one, and try it as well, if ..." | Read more » | over 7 years ago | |||
shanlter | "Yes, you got it :) @MadTinker If you want to use DFRobot's EC sensor, you'd better test your sample with a TDS pen first (which only costs several ..." | Read more » | over 7 years ago | |||
shanlter | "@ramarro, you tried so many stuff! Thanks for the info on EC, I am learning it. Lots of the questions you mentioned I don't know the answer, I aske..." | Read more » | over 7 years ago | |||
MadTinker | "@shanlter @ramarro Dang, got lost in the comments .... my bad. " | Read more » | over 7 years ago | |||
ramarro | "@MadTinker, @shanlter use DFRobot EC probe. I am using EC_mini_v31 we are two different person :) using 2 different devices for a similar project..." | Read more » | over 7 years ago | |||
MadTinker | "@shanlter A little confused about what you used for EC. The KnowFlow spec sheets indicates a DFRobot EC sensor, but in the above you indicate som..." | Read more » | over 7 years ago | |||
ramarro | "i forget to add some details :) even if you use 2 arduino, at least in my scenario, and u want them communicate in some way, you have to use a com..." | Read more » | over 7 years ago | |||
ramarro | "@shanlter using 2 arduino (or 20) doesn't change anything, unless you use galvanically isulated ac/dc converter. if you power them from the same s..." | Read more » | over 7 years ago | |||
shanlter | "@ramarro totally agree! When I first use their sensors, I also have the same problem. I asked them and was told to use several Arduino boards for e..." | Read more » | over 7 years ago | |||
ramarro | "@shanlter did you have the opportunities to talk with dfrobot team? i have purchased a ph shield from them, and after some experiment i noticed th..." | Read more » | over 7 years ago | |||
shanlter | "@MadTinker, according to my knowledge, the reason why to use "isolation" is to avoid interrupting between sensors. Both OPR and EC need isolation. ..." | Read more » | over 7 years ago | |||
shanlter | "Hi @MadTinker, thanks for your question! I just saw your questions around dataloggers for pH! I think DFRobots' isolation module is not online yet ..." | Read more » | over 7 years ago | |||
MadTinker | "This is great! I'm starting an effort that will involve the parallel build of a simple in situ data logger (e.g. Riffle or maybe Cave Pearl) and a ..." | Read more » | over 7 years ago | |||
warren | "@xose - awesome. And even "having some troubles" is ok to post -- if we break out the issues perhaps there are folks who can chime in with solution..." | Read more » | over 7 years ago | |||
xose | "Wooow!! Great @warren! I'm having some troubles with the orange pi by now. This week we'll lift up a raspberry 2 with both a drone and a ballon. Le..." | Read more » | over 7 years ago | |||
shanlter | "Thanks for your very good suggestions, @Paquicamus, yes, this Kyoritsu company make many good kits for water testing. We didn't test conductivity i..." | Read more » | over 7 years ago | |||
warren | "@xose - i've tagged it as an activity, but if other related (next steps) activities were added, and a Q+A section, this could be the first post on ..." | Read more » | over 7 years ago | |||
Paquicamus | "Did you measure the Conductivity using any meter/Probe? Is the green colour due to eutrophication(excessive richness of nutrients in a lake or othe..." | Read more » | over 7 years ago | |||
shanlter | "Hi @Paquicamus, thanks for the question. TDS is tested by this: https://www.amazon.com/HM-Digital-TDS-3-Handheld-Carrying/dp/B000VTQM70/ref=sr_1_10..." | Read more » | over 7 years ago | |||
shanlter | "Thanks @liz and @Bronwen, if you are going to order the parts from DFRobot, let me know. The isolation module been used hasn't been online yet (but..." | Read more » | over 7 years ago | |||
shanlter | "Thanks for saying so @xose! Compared with Riffle or Mae d'aigua, this one is much simpler, we use Arduino board, haven't do many field test yet, et..." | Read more » | over 7 years ago |