–Wikipedia A sensor is a device that detects events or changes in quantities and provides a corresponding output, generally as an electrical or optical signal; for example, a thermocouple converts temperature to an output voltage.
Hospital Infection Control • CDC: Hospital acquired infections cost $30B per year and lead to 100K patient deaths. • Inadequate hand washing a big cause.
Auto Insurance • Rethinking traditional risk assessment • Detect unsafe driving practices. • Anticipate who is most at risk. • React to risk assessment.
What is Arduino? • Open Source Microcontroller Hardware + Software • Geared toward prototyping • “Physical Computing:” interacting with the environment "Arduino is an open-source electronics platform based on easy-to-use hardware and software. It's intended for anyone making interactive projects.”
Programming Arduino • Official cross-platform IDE written in java • C/C++ with some sugar • Program referred to as “Sketch” • Many open source libraries available for various hardware (sensors, etc.)
What is XBee? • Radio modules that support wireless point-to-point communication • Serial communication • Minimal connections required — power, ground, data in, data out (UART) • 2 power options (1 mW/100 mW) • Support for multiple network topologies (Mesh, star, tree, etc.)
Why Apache Storm? • Speed: Process streaming data in realtime • Scalability & Fault Tolerance • Flexibility: Single event + Microbatch/Transactional APIs • Choose the latency/throughput balance that best for your use case. • At-most-once, at-least-once, exactly-once semantics.
Why Apache Kafka? • Distributed, Reliable Pub/Sub Event Queue • Allows consumers to rewind to specific points in the queue • Redeploy topologies without data loss • Durability: Provides everything Storm needs for exactly-once and at- least-once guarantees.
Whay not put smarts near the edge? • Updating hardware in the field is HARD! • Updating firmware in the field is almost as hard! • You probably got it wrong in the first place. Now what?
Whay not put smarts near the edge? • Save all the things! • You will get it wrong. • Weave a Safety Net (i.e. CYA) • Use batch processing to correct errors.
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