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Open Wave Height Logger
OWHL – The Open Wave Height Logger OWHL is a project originally dreamed up by Jarrett Byrnes and Ted Lyman at UMass Boston. Early on they contacted me for my thoughts on how to accomplish the goal of...
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Early Open Wave Height Logger battery tests
The Open Wave Height Logger prototype stack. Following on the previous post about the Open Wave Height Logger project, I’ve been conducting a simple battery life test. One of the prototype OWHLs was...
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Revised Open Wave Height Logger battery tests
The Open Wave Height Logger is meant to be a submersible pressure logger that will record absolute pressure at 4Hz for several months to give a record of wave height, and ideally do this on a single...
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OWHL micro SD card current draw tests
As outlined in an earlier post, I found that certain old micro SD cards were performing spectacularly poorly when it came to power consumption because they failed to go into a low-power sleep state...
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Open Wave Height Logger prototype in the water
I finally got around to deploying a prototype OWHL unit in the real live ocean to log some waves. The low-tech housing is made of 1.5″ schedule 40 pvc pipe. The pipe snugly fits the D-cell battery...
View ArticleArduino compile error: the filename, directory name, or volume label syntax...
GetFileAttributesEx D:\Arduino\libraries\SdFat/SdInfo.h D:\Arduino\libraries\SdFat/SdSpi.h: The filename, directory name, or volume label syntax is incorrect. The error message above started cropping...
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Open Wave Height Logger revision C
The Open Wave Height Logger (OWHL) project has reached another minor milestone with the release of a new hardware revision, RevC. This is a redesign of the three printed circuit boards, breaking...
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Updated OWHL assembly video
I have revised the Open Wave Height Logger electronics assembly video as of March 2020 to include narration (uh-oh) and more information about the programming process and error codes. This video...
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Open Wave Height Logger paper
After a prolonged period of development, we’ve finally put out an article in Limnology and Oceanography: Methods detailing our Open Wave Height Logger project (OWHL). This paper walks through the...
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