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Riffle: an Open Source Water Monitoring Approach

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The Riffle is a collection of designs that take an open source approach to water monitoring, with the intent of making gathering water information easier and more accessible. It is part of Public Lab's Open Water Project.

For an overview of the design philosophy behind the Riffle, see this wiki page.

The first Riffle design was an ARM-based datalogger board enclosed in PVC; Public Lab has supported development of an Atmel328-based datalogger enclosed in a water bottle.

Water Monitor Designs

By now, several instrument designs have been constructed around the Riffle, some of which of are described in an array of Github repositories:

Sensor Designs

We've started to summarize some of the approaches to sensing water parameters like conductivity and turbidity:

Project Status

  • 2016 Riffle_328 Status. A small order of Riffle_328 boards arrived late April 2016, and were sent to Public Lab community members as a way of testing the design and informing further development.

Activity grid

Here are some activities the Public Lab community has conducted using the Riffle

Purpose Category Status Author Time Difficulty Replications
Riffle Beta project - Methane Gas Sensor - - @Bob - - 0 replications: Try it »
Soaring Riffle field-test - @cfastie - - 0 replications: Try it »
Compost is hot, says Riffle field-test - @cfastie - - 0 replications: Try it »
How to bootload a Riffle #Arduino #water #science #tech - - @zengirl2 - - 0 replications: Try it »
In the heat of the pile observe - @cfastie - - 0 replications: Try it »
Riffle and Thermsistor - - @pdhixenbaugh - - 0 replications: Try it »
Blink a LED - Write a 'Sketch' and build a breadboard circuit for the Riffle build review-me @pdhixenbaugh 1h medium 1 replications: Try it »
Riffle test 1 verify - @cfastie - - 0 replications: Try it »
Riffle Device: Water Conductivity Sensor - - @rebeccah - - 0 replications: Try it »
Riffle campout test-limits - @cfastie - - 0 replications: Try it »

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.

How to get a Riffle

The Riffle is open source, and anyone can take the designs above to a PCB fabricator and have one made. Since the Riffle is not yet available for sale from public lab, if you are interested in buying one, add your information to this interest form, and Public Lab will facilitate a group order:


Title Author Updated Likes Comments
What probes to get with data loggers? @pdhixenbaugh about 5 years ago 4
Is the Riffle for sale at the Public Lab Store? @cfastie over 5 years ago 5
How similar is the code for the KnowFlow and the RIFFLE data loggers? @gretchengehrke almost 6 years ago 15
How does Riffle compatible with 5V sensors? @shanlter almost 6 years ago 7
How do I install a bootloader on a Riffle data logger? @warren about 6 years ago 2
What would be a good basic activity to test out a data logging device in water? @stevie over 6 years ago 7
What are the differences between the Nano Data Logger and the Riffle? @warren over 6 years ago 1
What are some lessons learned using the Riffle? (Especially Underwater) @pdhixenbaugh over 6 years ago 1
How to use Alkaline Batteries with the Riffle? @pdhixenbaugh over 6 years ago 5
Question: purchase sensor @frabisog over 8 years ago 2