henry pai
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arduino data logger + vaisala + some code

5/16/2017

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so, in search of a small, cheap mobile data logger, i came across the arduino-based logger (Mayfly by the Stroud Water Center engineers).  At about $60 when available, this is a little pricier than normal arduino builds (Cave Pearl project, Adafruit logger shield + controller, Seeeduino Stalker- weird name) or roughly comparable (Sodaq MBilli).  But with the hope of less soldering, real time clock with low drift, SDI-12 communications capability, LiPo single cell charge controller, and expandable/replaceable memory (via SD card), the specs were nice.  Compared with Campbell CR300 price point ($600'ish) and unknown snow/enclosure crushing conditions, the Mayfly logger board becomes a good test platform for rugged conditions without destroying more robust logging platforms.  And due to its size, it can be placed in a smaller enclosure higher up so it doesn't become quite the wind mast.

Attached is code for a Vaisala WXT 530 series weather station (user-defined composite SDI-12 message).  This code, logger, and sensor ran about a week logging @ 5 min intervals in office conditions.

To be done: set up radio/cellular telemetry, but currently the site is a bit power-constrained.
vaisala_mayfly_sleep.ino
File Size: 8 kb
File Type: ino
Download File

1 Comment

    small projects...

    that may be useful to folks other than just myself.

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