The document discusses the Internet of Things (IoT), emphasizing key components like devices, security, and cloud integration. It highlights the role of Qt in developing graphical and non-graphical applications for IoT systems, while addressing challenges related to connectivity, energy consumption, and security measures. Additionally, it outlines use cases for alarm settings and cloud services, showcasing the flexibility required to integrate new devices into IoT ecosystems.

1. IoT : The Alarm Clock

2. 2
Adrien Leravat
Presentation
Witekio
• Germany, France, US, Taiwan
• System / ecosystem
• BSP & drivers, embedded & mobile software

3. 3
Internet of What ?
• Attributes
– Devices, Communicating.
– Acquire data, can grow, intelligent
• Vague but powerful
– Car, home, town
• New challenges
– Networks, Energy consumption, Security

4. 4
Key points
Your own components
• This is about
– Highlighting IoT important keys
– Qt in the picture
• IoT devices
• Security
• Into the clouds
• Let there be light !

5. IoTdevices
Embedded Qt

6. 6
Embedded
• Our Alarm-clock
– NXP i.MX6 DualLite
– Linux 3.10, Yocto 1.5
• Connectivity is key
• Medium / Long range
– Networks, Energy consumption, Security
• Short range
– BT, BTLE, NFC, RFID
• Even ‘’Cables’’!

7. 7
IoT Sytem Topology
Sensors
- No CPU
- Acquire data
Devices
- ARM
- Screen
- Qt
iMX6
Gateway/Broker
- ARM/x86
- Screen
- Qt
Cloud
- x86/64
- Qt
  Size of Qt

8. 8
Qt’s role
• For graphical applications
– Qt Quick / Widgets
– Depends on GPU, RAM and GUI’s complexity
• For non-graphical applications
– Leverage Qt classes (Networking, Files, DB, …)
– Sharing code, good performances
– Consider alternatives for heavy duty remote
services

9. Polishing with effectsSecurity
Keep it safe

10. 10
Security
• No one is ‘’safe’’
– Growing number of connected devices, means more
opportunities for hackers
– Shodan: IoT device search engine

11. 11
Security
• System
– Keep it up to date (packages)
– Remove development and unused services
– Firewall
– Security enhancements
– Seal the box

12. 12
Security
• Encrypt communications
– QSslSocket: TCP socket with SSL/TLS (requires
OpenSSH)
– Manually:
• Simplecrypt (Qt), OpenSSH, Crypto++
• Check input data
– Avoid strings when possible
– QString::toHtmlEscaped/replace, QRegExp
– QSqlQuery::bindValue

13. Make them talk
Into the clouds

14. 14
Example use cases
• Save user alarms and settings
• Set alarms from Smartphone
• News and weather
• Intelligent wake up
– Depending on traffic, weather

15. 15
Cloud services
• Cloud services / dedicated server
– Storage
• User settings, alarms
– Computing
• Traffic and weather, analysis
• Interface
– HTTP + JSON/XLM
• Very easy for Web applications
– Authentication

16. 16
Cloud services
Third party service
– Weather, news
Our server
– User preferences, Alarms
– Qt Cloud Services,
Amazon, etc
• QNetworkAccessManager
– HTTP Get/Post/Put
– QNAM::get(QNetworkRequest(QUrl(“http://myserver.com”);
– QJsonDocument, QDomDocument (XML)
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17. 17
Cloud services
Sorry I lied…
Gateway device / server
– To third-party services
– Access control
– Formatting
– Caching
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18. 18
Context
Qt Approved

19. Let there be light!
…but thanks to Qt

20. 20
Adding a light
• Light
– Wifi connected
– Brightness, color
– QUdpSocket on a fixed IP address
– Power on when an alarm rings

21. 21
Notifications
• Remote alarm
– Server has something to say ! “Push notification”
– Device listens on a specific TCP port
– Only accepts connections from server, QHostInfo
QTcpServer server;
server.listen(host, port);

22. 22
IoT Flexibility
?
Sensors Devices Gateway Cloud
• What if more ? New devices ?
– Like a Coffee machine
– … need for flexibility
– Broadcast yourself

23. 23
IoT Flexibility
?
Sensors Clients Broker Client(s)
• What if more ? New devices ?
– Centralizes information
– Clients publish events (temp., lights on, etc.)
– Clients subscribe to events
– MQTT (qmqtt, mosquitto), AMQP, XMPP …