Ekho: Realistic and repeatable experimentation for tiny energy-harvesting sensors

Josiah Hester, Timothy Scott, Jacob Sorber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

62 Scopus citations

Abstract

Harvesting energy from the environment makes it possible to deploy tiny sensors for long periods of time, with little or no required maintenance; however, this free energy makes testing and experimentation difficult. Environmental energy sources vary widely and are often difficult both to predict and to reproduce in the lab during testing. These variations are also behavior dependent-a factor that leaves application engineers unable to make even simple comparisons between algorithms or hardware configurations, using traditional testing approaches. In this paper, we describe the design and evaluation of Ekho, an emulator capable of recording energy harvesting conditions and accurately recreating those conditions in the lab. This makes it possible to conduct realistic and repeatable experiments involving energy harvesting devices. Ekho is a general-purpose tool that supports a wide range of harvesting technologies. We demonstrate, using a working prototype, that Ekho is capable of reproducing both solar and RF energy harvesting environments accurately and consistently. Our results show that Ekho can recreate harvestingdependent program behaviors by emulating energy harvesting conditions accurately to within 77.4 ìA for solar environments, and can emulate RF energy harvesting conditions significantly more consistently than a programmable RF harvesting environment.

Original languageEnglish (US)
Title of host publicationSenSys 2014 - Proceedings of the 12th ACM Conference on Embedded Networked Sensor Systems
PublisherAssociation for Computing Machinery
Pages1-15
Number of pages15
ISBN (Electronic)9781450331432
DOIs
StatePublished - Nov 3 2014
Event12th ACM Conference on Embedded Networked Sensor Systems, SenSys 2014 - Memphis, United States
Duration: Nov 3 2014Nov 6 2014

Publication series

NameSenSys 2014 - Proceedings of the 12th ACM Conference on Embedded Networked Sensor Systems

Other

Other12th ACM Conference on Embedded Networked Sensor Systems, SenSys 2014
Country/TerritoryUnited States
CityMemphis
Period11/3/1411/6/14

Keywords

  • Emulation
  • Energy harvesting
  • I-V curves
  • RFID

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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