Presentation at Creuna Tech Möte on October 30th, 2013.

1. Internet of Things
KOJI WAKAYAMA 2013
Wednesday, October 30, 13

2. Overview
Embedded computing
Arduino Yun (Demo)
MQTT
Mosquitto MQTT Broker (Demo)
Arduino MQTT Library (Demo)
Pololu 3pi Robot
Spooky (Live coding)
3D Printing (3D Print Shop)
Wednesday, October 30, 13

3. Embedded computing
Wednesday, October 30, 13

4. Arduino Yun
(Demo)
Wednesday, October 30, 13

5. MQTT
Message Queue Telemetry Transport
Lightweight broker-based
publish/subscribe messaging protocol
Invented in 1999
by Dr Andy Stanford-Clark (IBM) and Arlen Nipper (Arcom)
Standard MQTT port: 1883
3 Qualities of Service for message delivery
Last will and testament feature
MQTT-S for sensor networks
more on http://mqtt.org
Wednesday, October 30, 13

6. Pub / Sub
Message
A
Subscriber
Message
A
Message
A
Publisher
Subscriber
Topic
Message
A
Wednesday, October 30, 13
Subscriber

7. Security
Name and Password
SSL
(TCP/IP port 8883 is registered, for using MQTT over SSL)
Encrypted Data
Wednesday, October 30, 13

8. MQTT Topics & Wildcards
Topics are hierarchical like filesystem path
/sensor/1/temperature
/sensor/2/temperature
/sensor/2/pressure
Subscribers can use wildcards in topics
/sensor/+/temperature
/sensor/2/+
/sensor/#
Wednesday, October 30, 13

9. Mosquitto MQTT Broker
mosquitto.org
(Demo)
Wednesday, October 30, 13

10. Arduino MQTT Library
(Demo)
https://github.com/mcollina/mqtt_on_the_yun/
Wednesday, October 30, 13

11. Pololu 3pi Robot
Wednesday, October 30, 13

12. Serial Slave Mode
http://www.pololu.com/docs/0J21/10.a
3pi motor control
receives 2 bytes
cmd (128-255)
speed (0-127)
m1 forward
hex: 0xC1
binary 11000001
decimal 193
Wednesday, October 30, 13
m2 forward
hex 0xC5
binary 11000101
decimal 197
m2 backward
hex 0xC6
binary 11000110
decimal 198
m1 backward
hex 0xC2
binary 11000010
decimal 194

13. Spooky
1_express
2_socketio
3_mqtt
4_arduino
5_pumpkin
Wednesday, October 30, 13

14. 3D Printing
3D Print Shop
Wednesday, October 30, 13

15. Tack!
Wednesday, October 30, 13