System architecture directions for networked sensors
ASPLOS IX Proceedings of the ninth international conference on Architectural support for programming languages and operating systems
An analysis of a large scale habitat monitoring application
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Contiki - A Lightweight and Flexible Operating System for Tiny Networked Sensors
LCN '04 Proceedings of the 29th Annual IEEE International Conference on Local Computer Networks
Fidelity and yield in a volcano monitoring sensor network
OSDI '06 Proceedings of the 7th USENIX Symposium on Operating Systems Design and Implementation - Volume 7
Integrating concurrency control and energy management in device drivers
Proceedings of twenty-first ACM SIGOPS symposium on Operating systems principles
The hitchhiker's guide to successful wireless sensor network deployments
Proceedings of the 6th ACM conference on Embedded network sensor systems
Accurate, fast fall detection using posture and context information
Proceedings of the 6th ACM conference on Embedded network sensor systems
Hijacking power and bandwidth from the mobile phone's audio interface
Proceedings of the First ACM Symposium on Computing for Development
Grafting energy-harvesting leaves onto the sensornet tree
Proceedings of the 11th international conference on Information Processing in Sensor Networks
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As the rapid pace of smartphone improvements drives consumer appetites for the latest and greatest devices, the hidden cost is millions of tons of e-waste containing hazardous chemicals that are difficult to dispose of safely. Studies show that smartphone users are replacing their devices every 18 months, almost three times faster than desktop computers [1, 3], producing millions of discarded smartphones each year that end up lying in desk drawers, buried in landfills, or shipped to third-world countries where they are burned to extract precious metals, a process that damages both the health of those involved and the environment. Fortunately, the capabilities of discarded smartphones make them ideal for reuse. Instead of ending up in a landfill, a discarded smartphone could be integrated into a home security system or transformed into a health care device for the elderly. In this paper, we evaluate using discarded smartphones to replace traditional sensor network "motes". Compared with motes, discarded devices have many advantages: price, performance, connectivity, interfaces, and ease of programming. While the main question is whether their energy consumption is low enough to enable harvesting solutions to allow continuous operation, we present preliminary results indicating that this may be possible.