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Investigation of Bluetooth Communications for Low-Power Embedded Sensor Networks in Agriculture
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 131620559, 2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131620559) @2013
Authors: Andrew D. Balmos, Alexander W. Layton, Aaron Ault, James V. Krogmeier, Dennis R. Buckmaster
Keywords: Bluetooth Bluetooth Low Energy (LE/BLE) Sensor Sensor Network Farm Data Automation.
Nearly all mobile devices currently on the market have Bluetooth built-in, making it a viable wireless protocol choice. In addition, the recent release and initial adoption of the Bluetooth 4.0 Low Energy (BLE) standard is a strong candidate for use in very low power, long battery life sensor networking.
This work investigates how various BLE configurations affect network size, network throughput, and sensor battery lifetimes. We present a strategy to select the best network parameters that achieve a certain sensor Update Interval (UI) and Connection Latency (CL), as well as minimize a sensors power requirements, reduce data latency, and conform to size and throughput constraints. We present a simple BLE power model created from current consumption measurements of the commercially available TI CC2540 BLE module. Combining this BLE power model with a simple capacity model of a battery allows estimation and validation of sufficient battery life. Sensor lifetimes on the order of multiple years can easily be achieved for large UI and CL sensors.