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Georgia Journal of Science

Article Title

DEVELOPMENT OF AN INEXPENSIVE LOW-POWER SONDE USING THE TEENSYTM MICROCONTROLLER

Abstract

Hydrologic flow in and out of coastal zones, such as estuaries, may be responsible for sediment transport, altered salinity gradients, and variations in nutrient availability. In order to measure such flow, we have developed and tested a Lagrangian style surface drifting sonde capable of recording position and time for deployments lasting several days. A TeensyTM microcontroller is interfaced to a Global Positioning System (GPS) sensor with real-time cell network communications capability. The electronics is housed in a floating, waterproof enclosure and periodically transmits location and time data via short message service (SMS) to a website where information is stored for further analysis. Because the location is transmitted in near real-time, the device can be retrieved at the end of the sampling period. Design parameters including electronics, battery capacity, and power-saving software techniques will be presented.

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