_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...
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mathew | "the #3 stopper just barely fits under a bottle cap. I'd mentioned trying vulcanized rubber stoppers and that they were too hard-- the problem was p..." | Read more » | over 9 years ago | |||
cfastie | "The configuration with the stopper held in firmly with the threaded bottle cap looks really good. How hard is it to get that to work, i.e., to get ..." | Read more » | over 9 years ago | |||
mathew | "@DavidMack a silicone stopper would be great! they're better in cold temperatures than natural rubber. It also seems like it would bond better with..." | Read more » | over 9 years ago | |||
cfastie | "This looks like a surefire way to waterproof the wires. But now you have to waterproof the seal between the stopper and the bottle. Plastic water b..." | Read more » | over 9 years ago | |||
DavidMack | "what if you got a solid silicone stopper and put two small needle sized holes in it (carefully) and ran each round wire through its own hole. you'..." | Read more » | over 9 years ago | |||
mathew | "this is interesting! I hadn't thought to just use the stopper directly filled with silicone. " | Read more » | over 9 years ago | |||
cfastie | "New data: I posted about the SkyShield at the KAP forum and got two orders in 24 hours, both for the solder-yourself kit! So disregard everything I..." | Read more » | over 9 years ago | |||
warren | "+1 "in-between stage" -- it could invite people into the process earlier without needing to yet 100% "nail it" on a final design, and hopefully fol..." | Read more » | over 9 years ago | |||
mathew | "Don, that's a pretty good case for project R&D having an "in-between" stage where bigger production runs aren't ready to go but folks are maki..." | Read more » | over 9 years ago | |||
rjstatic | "For those interested in a good USB WiFi option, Dogi and I can recommend TP-LINK 150Mbps Wireless N USB Adapter. We tested about 30 USB WiFi option..." | Read more » | over 9 years ago | |||
rjstatic | "@liz It looks like The Things Network is a citizen led initiative to use the new LoRa protocol which sounds promising, I've heard some buzz around ..." | Read more » | over 9 years ago | |||
donblair | "Thanks for all the good thoughts, wow! Chris -- I think you're right -- your experience and our friend Rui's experience is that most folks don't w..." | Read more » | over 9 years ago | |||
mathew | "I somewhat agree with @cfastie. I'm skeptical that there is value in a through-hole kit because there are only three components a DIYer would want..." | Read more » | over 9 years ago | |||
cfastie | "This solder-yourself thing is a tough issue. The Riffle itself is always going to be surface mount, so you are going to have to manufacture them so..." | Read more » | over 9 years ago | |||
warren | "Man, bluetooth is always so crazy expensive! But those $5 radios look great... very cool. " | Read more » | over 9 years ago | |||
cfastie | "Neil, Yes, the window slime will probably have to be removed every couple of weeks. Or maybe window transparency could be monitored with a separat..." | Read more » | over 9 years ago | |||
neilh20 | "Wow amazing mockup video. Any thoughts on slime buildup on sensor windows.? I don't know whether a heat-shrink tubing could be useful? http://www.m..." | Read more » | over 9 years ago | |||
liz | "Can we do anything with a network like http://thethingsnetwork.org/ http://thenextweb.com/insider/2015/08/19/the-things-network-wants-to-make-ever..." | Read more » | over 9 years ago | |||
donblair | "OH. MY. GOSH. Amazing design (and video!!!). Can't wait to chat with you about this. Relevant electronics parts are being ordered presently. " | Read more » | over 9 years ago | |||
cfastie | "Here's another design of an indestructible underwater housing. You should be able to build one with hardware store parts for under $15. No mirrors..." | Read more » | over 9 years ago | |||
danbeavers | "Great, I doubt you will be going below 10m so ignore my comments. The http://waihinga.ac.nz site has lots of good info that I did not look for bef..." | Read more » | over 9 years ago | |||
ajawitz | " I assume by "computer" you mean "arduino/microcontroller" unless I gave the impression that I was going for a swim with my laptop? In any case, I..." | Read more » | over 9 years ago | |||
danbeavers | "I think you miss my point. I believe that if you take the sensor very deep that the waterproofing will fail due to the increased pressure. The ad..." | Read more » | over 9 years ago | |||
ajawitz | "Do you know how deep you can take the "waterproof" DS18B20 temp sensor? It may be just designed to take it as deep as the cable is long -@danbeaver..." | Read more » | over 9 years ago |