In this lab, we will connect our devices to the XMPP network and start interacting with them. We will learn how devices are identified on the global network, how to connect our devices, how to make friends with them and how to exchange simple messages (chat) with them. We will demonstrate that communication is network topology independent, in that communication can bypass firewalls in a secure manner. This is done by installing a chat application on our phone and use it to chat with the devices. This lab continues the work done in the previous lab. Participants that did not attend the previous lab will be given the opportunity to work on the first lab during the lab. There will also be an opportunity to meet earlier at GOTO 10 to discuss previous work, labs and related areas. If you want to connect your own devices, please bring them along. I’ll help get them connected. Also consider visiting the Smart City Lectures.

1. © Waher Data AB, 2018.
Smart City Lab 2
Connect & Chat with your device

2. © Waher Data AB, 2018.
1. Sensor Project
SensorXmpp

3. © Waher Data AB, 2018.
Mastering Internet Of Things Repository
https://github.com/PeterWaher/MIoT

4. © Waher Data AB, 2018.
Initialization

5. © Waher Data AB, 2018.
2. Arduino connection

6. © Waher Data AB, 2018.
Finding USB port

7. © Waher Data AB, 2018.
Initializing Arduino

8. © Waher Data AB, 2018.
Receiving sensor events

9. © Waher Data AB, 2018.
Sampling

10. © Waher Data AB, 2018.
Averaging & Spike removal

11. © Waher Data AB, 2018.
Start communication

12. © Waher Data AB, 2018.
3. Network connection

13. © Waher Data AB, 2018.
XMPP

14. © Waher Data AB, 2018.
Communication Patterns
Async.
Msg.
Req/Resp Pub/Sub Federation Broker P2P7
MQTT ✓ ✓ ✓
HTTP ✓ ✓
CoAP ✓ ✓ ✓
XMPP ✓ ✓ ✓✓✓ ✓ ✓ ✓

15. © Waher Data AB, 2018.
NuGets
 Waher.Networking.XMPP
 Waher.Networking.XMPP.Chat
 Waher.Networking.XMPP.Concentrator
 Waher.Networking.XMPP.Control
 Waher.Networking.XMPP.PEP
 Waher.Networking.XMPP.Provisioning
 Waher.Networking.XMPP.Sensor

16. © Waher Data AB, 2018.
Connection Properties

17. © Waher Data AB, 2018.
User Input

18. © Waher Data AB, 2018.
Registration

19. © Waher Data AB, 2018.
Connect to network

20. © Waher Data AB, 2018.
Authorization

21. © Waher Data AB, 2018.
4. Sensor Data
Request/Response

22. © Waher Data AB, 2018.
Momentary Values

23. © Waher Data AB, 2018.
Historical Values

24. © Waher Data AB, 2018.
Done

25. © Waher Data AB, 2018.
5. Sensor Data
Publish/Subscribe

26. © Waher Data AB, 2018.
Publishing Momentary Values

27. © Waher Data AB, 2018.
6. Actuator Project
ActuatorXmpp

28. © Waher Data AB, 2018.
Control Parameters

29. © Waher Data AB, 2018.
Control Commands to Arduino

30. © Waher Data AB, 2018.
7. Chat Bot

31. © Waher Data AB, 2018.
Chat bot

32. © Waher Data AB, 2018.
Chat example
https://waher.se/IoTGateway/SimpleIoTClient.md