Talk I gave at LNUG. Forgot to explain pub/sub vs. polling. never mind. You can look that up. This is about a research project around a new-build ecoHome.

1. 28th
August '13 LNUG 1
LNUG August 2013
IoT with node.js on Raspberry Pi
@paul_tanner

2. 28th
August '13 LNUG 2
IoT with node.js on RPi
● “Internet of Things”
● System approach
● Distributed system
● Protocols
● Current project
● Node goodness

3. 28th
August '13 LNUG 3
Internet of Things
● Real-time control
systems:
● Input Sensors;
● (Stateful)
processing;
● Control actuators
● Internet connectivity

4. 28th
August '13 LNUG 4
System approach
out = in > T || out && in > -T

5. 28th
August '13 LNUG 5
Distributed System

6. 28th
August '13 LNUG 6
Distributed System

7. 28th
August '13 LNUG 7
The Hardware
RFM12Pi
Arduino with Ethernet

8. 28th
August '13 LNUG 8
Protocols
● MQTT for data transfer
● one standard pub/ sub
● lightweight :-)
● numerous implementations
● application-specific semantics
● REST for logging (and/ or puts but not gets)
● HTTP for remote control via browser

9. 28th
August '13 LNUG 9
Current Project
ecoHome demonstrator
● mostly autonomous
● numerous sensors
● controls heating, ventilation, shutters, lights
● RPi + Arduinos, talking MQTT
● Logging to Xively (for analysis)
● Local rules engine
● Admin app on local web server
● modules: MQTT.js; node-serialport, arduino client etc

10. 28th
August '13 LNUG 10
Node.js goodness
● runs great on Rpi (after 6 hour build)
● support for sockets and REST
● node-mqtt works fine with mosquitto server
● node-serial enables device attachment
● ease of implementing engine, rules etc
● removes heavy lifting from Arduinos

11. 28th
August '13 LNUG 11
Contact
Thanks for Listening
Paul Tanner
@paul_tanner
paul@virtual-techno.com
www.slideshare.com/paul_tanner
01494 581979