The PermaSense DeploymentTesting WSNs for the Glacier

Jan Beutel, ETH Zurichwith Roman Lim, Mustafa Yücel and the PermaSense team

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SNPK Project – Alpine Permafrost Monitoring

• Cooperation with Uni Basel (C. Tschudin) and Uni Zurich (S. Gruber)

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The Sensor Network Case – Environmental Monitoring

Internet

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Towards Real-world Validation of WSN Applications

Continuous IntegrationStep 1

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Regular Builds with Notifications

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Code Analysis using Findbugs

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Graphical Reporting of Results

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Test-runs and Log File AnalysisStep 2

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Long-term Testing: 6 Days of Log Files

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Refinement Through Repeated Test-runs

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Variation of Network Topology

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Parameter Tuning

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The Final Result

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Physical Parameter ExtractionStep 3

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Basic Node Observation with the DSN: Target Power

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Test-rig with Switchbox and Automatic DAQ

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Temperature Cycle Testing in the Fridge

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Basic Profiling of Voltage and Current

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Detailed Power Analysis

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Communication Window Current (10000 samples/sec)

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Voltage Drops on High Current Consumption

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DSN Node Pair for External Power and Clock Meas.

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Induced Errors: Timing Offset Though Chilling

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Somehow Sleep Seems to go Wild...

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Not only Once... Maybe Systematically... ?

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Temperature Dependant Sleep Current

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The Future: Automatic Builds with Phys. Parameters