Interfacing of Secure Digital Media with Wireless Sensor Systems, 10-R8034

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Principal Investigators
Joshua D. Kenney
Donald R. Poole
Gregory C. Willden
Ben A. Abbott

Inclusive Dates:  02/02/09 – 06/05/09

Background - SwRI has been growing work in the area of wireless sensor networks (WSNs), and has performed work for the Defense Advanced Research Project Agency (DARPA) and Central Research Institute of Electric Power Industry (CRIEPI), as well as internally. Recently, the U.S. Army Corps of Engineers, Nashville District, became interested in evaluating SwRI's WSN capabilities for dam rehabilitation projects to characterize karst aquifers and monitor dam structures.

The addition of standard secure digital (SD) media to these systems bolsters the current design and provides extended memory for long-term data collection, as well as facilitates easy on-site access to collected data.

Approach - The technical approach was to research and develop the protocols and interface circuit required to access SD media and implement a design on a Chipcon CC2510 microprocessor-based wireless sensor node. The CC2510 houses a 2.4 gigahertz (GHz) radio transceiver, single-cycle 8051 microcontroller, and 32 kilobytes (kB) of flash memory within a single chip. The CC2510 is the common platform for all the WSN systems that have been developed thus far by SwRI, and researchers were looking to enhance SwRI's previous design (hardware and software) to broaden its WSN capabilities.

Accomplishments - This research effort resulted in a significantly enhanced capability for long-term data logging in our wireless sensor node design. This capability has been utilized in fielded sensor nodes on externally funded efforts.

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