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Internet of Things

Internet of Things. Chip McClelland. Agenda. Problem statement Selection criteria Some options considered / explored GPRS Example – Xively WiFi Example – data.sparkfun.com Next Up – Power and Cost optimization. Problem Statement.

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Internet of Things

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  1. Internet of Things Chip McClelland

  2. Agenda • Problem statement • Selection criteria • Some options considered / explored • GPRS Example – Xively • WiFi Example – data.sparkfun.com • Next Up – Power and Cost optimization

  3. Problem Statement There is no shortage of cheap and ubiquitous sensors to collect data. But… I need to reduce the time and effort to retrieve that data and a mechanism to quickly, continuously and automatically share it.

  4. Communications Options

  5. Data Service Options • Xively • Professional Internet of Things Site • Easy and free to get started • Integrated graphing – great documentation • Commercial service – not cheap • Data.Sparkfun.com • Based on open-source Phant – roll your own • Less integrated – access via .CSV and .JSON only • Public by default – unclear commercial future

  6. GPRS & Xively • Pros: • Simplified design: location, time, storage • Works just about anywhere • Range of communication choices: Http, JSON, SMS • Bi-directional / ubiquitous • Cons: • Power consumption – up to 500mA when sending • Speed – GPRS service only • Can’t do SSL due to Arduino limitations • Cost - $2/day or $60/month • Communicate using SoftwareSerial AT commands - painful

  7. CC3000 & Sparkfun • Pros: • Simplified design: location, time, storage • WiFi broadly available • Range of communication choices: Http, JSON, SMS • Speed / Bandwidth • Communicates using SPI Bus- Buy the Adafruit version! • Cons: • Does not work with “Captive Portal” networks! • Can’t do SSL due to Arduino limitations • Bi-directional possible but need something like DynDNS

  8. Next Up • Like most embedded projects – Power and Price • Power Optimization • New power supply for both • Sleep and software control of modem • LiPoly batteries • Price • Custom board • Less expensive data services – Adafruit exploring?

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