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NetPP exhibition control wireless sensor network

NetPP is a simulation of a wireless sensor network which makes use of the IEEE stack recommended for IoT, from bottom to top: wireless IEEE 802.15.4, 6LowPAN, IPv6 with RPL routing, UDP and CoAP. It runs on Z1 motes. This project was developed for the Advanced Networks and Wireless Systems exam (Networking++ for friends)

Scenario

NetPP is a company which organizes public events and exhibitions, which installs a sensor (oracle) for each stand in order to keep track of people's flow.

  • Formal requirements:
    • network must be fully operational in less than 70 minutes, which is an estimation of the time needed to mount all the stands for small daily exhibition
    • nodes run on battery and must use as less energy as possible, in order to make it possible to reuse them for multiple events
  • Other requirements:
    • RPL must use objective function 0, ie find the nearest grounded root
    • Sensor messages must be RFC8428 (SenML) compliant
    • a CoAP proxy must be developed in Java using the Eclipse Californium CoAP library (proxy)

Trickle parameters

Repository organization

  • client: source code for a CoAP client
  • cooja: sample simulations for Cooja
  • oracle: source code for the sensor node
  • proxy: source code for the CoAP proxy
  • simulation: scripts for running simulations and plot performance graphs

Run

  1. choose a Cooja simulation file from cooja directory
  • start the serial socket server on node 1 (border router)
  • start the simulation
  1. attach a rpl-border-router to Cooja
  • you can use the one from examples/ipv6/rpl-border-router in your Contiki repository
    • if you want to reproduce the simulation results, use the modified version (which outputs the number of discovered routes)
  • connect $ make connect-router-cooja PREFIX="2001:db8:cafe:babe::1/64"

Proxy

  1. $ mvn package
  2. $ java -jar target/proxy-2019.11.0-jar-with-dependencies.jar <prefix> <n>

where

  • <prefix> is your network prefix (specify all 64 bits)
  • <n> is the number of nodes in the network

Example: $ java -jar proxy/target/proxy-2019.11.0-jar-with-dependencies.jar 2001:db8:cafe:babe 30

Resources on the server are named after the node IPv6 address, eg: urn:it.unipi.ing.ce.netpp:c00000001.

You can use a CoAP browser to list all resources on the server, for example:

Client

  1. $ mvn package
  2. java -jar target/client-2019.11.0-jar-with-dependencies.jar <url>

where <url> is a CoAP URL

Example: $ java -jar target/client-2019.11.0-jar-with-dependencies.jar coap://[2001:db8:cafe:babe::1]/urn:it.unipi.ing.ce.netpp:c00000001

Simulation

Use a simulation with a pseudo random number generator enabled, eg. simulation-prng.csc.