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Carnegie Mellon University

95-733 Internet of Things

Review Notes for Final Exam

Primary article: Enabling the Internet of Things

  • localized scalability
  • physical web
  • URI vs. URL vs. URN
  • gateway devices
  • proxy service
  • smartphone interaction - direct and proxy
  • closed systems and private APIs
  • NFC, QR Codes, and BLE
  • Schema.org
  • AJAX
  • Alternative approaches to IoT
    • peer-to-peer with gateway
    • centralized IoT service
  • Infrared beacons and URLs from Cooltown
  • Requirements for connecting directly to the internet and how that impacts cost and power consumption
  • low performance communication standards: ZigBee, 6LoWPAN, Bluetooth Classic
  • proximity sharing
  • discovery and trust
  • edge computing and cloudlets
  • the problem with specialized native smart phone apps
  • discovery
  • ubiquitous information gathering, context sensing, and control
  • privacy and security
  • associating a Web URI with every person, place and thing
  • BLE Beacons and URIs

Four styles of web interaction using HTTP lecture notes

  • Traditional request response
  • AJAX (study example shopping cart)
  • JSONP
  • WebSockets

Web sockets lecture notes

  • Web sockets in Javascript
  • Websockets in JEE (encoders and decoders)

The publish subscribe pattern and MQTT lecture notes

  • Decoupling
  • MQTT
  • MQTT message format
  • MQTT and web sockets
  • Durable and non-durable subscriptions
  • MQTT last will and testament
  • MQTT qualities of service
  • MQTT hierarchical namespace

Seminal article: The Computer for the 21st Century, 1991

  • Tabs, pads, and boards
  • Ubiquitous computing
  • The active badge
  • Scrap computers
  • Example use case

Primary article: People, Places, Things: Web Presence for the Real World

  • HP Cooltown
  • Web presence for people, places and things
  • URLs for addressing
  • URL Beaconing and URL sensing for discovery
  • Building on the web
    • low barrier to entry
    • device, language, and service independent protocol
    • content evolution and not interface heterogeneity
    • depth and higher-level content-provision services
    • Ubiquity
    • eSquirt
    • ID resolution

Primary article: Sensor Andrew at Carnegie Mellon

  • Traditional IM applications
  • SMTP architecture
  • XMPP architecture
  • Publish/Subscribe messaging
  • Jabber JID
  • XML document transfer in XMPP
  • , , ,
  • XML Schema for XMPP

Primary article: OpenChirp at Carnegie Mellon

  • OpenChirp
  • LoRaWAN
  • LPWAN
  • LoRaBug
  • Use Case

Microcontrollers and PAN Protocols lecture notes

  • Smart connected products changing established industries
  • What is a micro controller?
  • Capabilities of smart connected products
  • Monitoring, Control, Optimization, Autonomy
  • EnOcean, ZigBee, Thread, Bluetooth, Wi-Fi, 802.15.4 and 6LoWPAN

Bluetooth lecture notes

  • Bluetooth and Bluetooth Low Energy
  • Discovery, clients and servers
  • GAP
  • GATT
  • Profiles, Services, and Characteristics

Web of Things Architecture at W3C

Self-sovereign Identity and Blockchains lecture notes

  • SSI Offline
  • SSI Online
  • Existing systems and standards

Smart cities lecture notes

  • Transportation
  • Human Services
  • Safety
  • Conservation

Google Charts

  • Google Charts basics
  • Google charts in course project

Argon microntroller lecture notes

  • What is firmware?
  • How did our Argon communicate with our servlets?
  • Be able to read and interpret a simple firmware application.
  • The Particel Device Cloud

Industrial Internet of Things (IIOT) lecture notes

  • SCADA
  • PLC

CoAP and REST lecture notes

  • Direct Integration Pattern
  • Gateway Integration Pattern
  • Cloud Integration Pattern
  • REST design principles
  • Constrained Application Protocol (CoAP)
  • Compare CoAP with HTTP interaction
  • How does CoAP provide reliability over UDP?
  • CoAP Request/Acknowledge/Callback
  • CoAP publish subscribe
  • CoAP resource discovery

Flow Programming and Edge Analytics

  • Node-Red (Javascript)
  • Apache Edgent (Java)

Review Project 1

  • Publish/subscribe using Particle
  • AJAX
  • JSON and XML compared
  • Websockets use case

Review Project 2

  • MouseTracker Publish/Subscribe using MQTT
  • Java TemperatureSensor using MQTT and MQTT topics
  • Java DiceRolling using MQTT and GoogleCharts
  • Argon publisher sending a name to MQTT

Review Project 3

  • Webhooks
  • Particle Cloud
  • Thing Speak