In the field of the internet of things smart home is an area, which will change our day-to-day life most intensive. The vision of an overall and adaptive Smart Home is still some years away, but there are individual solutions, for example the thermostat from NEST, which delivers great value to his users already. The same is true for approaches, which make the life of residents safer and handle emergency situations. In this talk we want to demonstrate on a concrete showcase how an intelligent smoke detector could look like and that the implementation is possible with state-of-the-art technologies. When having the infrastructure it is also easy possible to integrate other devices, for example intrusion detection systems. On a technical perspective we are using OpenHAB as communication hub inside the house. It uses the Homematic protocol to communicate with the smoke detectors and intrusion sensors. Outbound we are leveraging the HiveMQ MQTT broker in order to connect a mobile app, a SMS-plugin and a web app. Apart from the obvious alarm functionality, we also implemented additional features which have a benefit for the user, for example a status display and a test alarm for checking the functionality. In the talk we will explain the whole system, beginning with the benefits for the user and ending with an in-depth look at the technical implementation and of course we will demonstrate the system in action.

1. Smart Home Live:Intelligent Detection of Fire or a Break-In with MQTT and OpenHAB

2. Support their clients to
successfully transform their
business in a digitized and
connected world
expertise in MQTT
the protocol that drives
the internet of things
Consulting for
insurance companies
and other industries
Consulting and Creating
of Building Block for the
Internet of Things
About us

3. SMART HOME LIVE
"
MOTIVATION
1
• Showcase objectives
• Fire dangers
"
OVERVIEW
2
• 1st live demo -
maintenance features
• Basic architecture
"
SETUP
3
• Architectural details
• 2nd live demo – break-in
detection
"
CONCLUSION
4
• Lessons learned
• Outlook

4.  Evaluate available technologies like MQTT, Eclipse SmartHome
 We are not building a product!
 Iterate and explore key features for an intelligent smart home
Showcase objectives

5. Fires are life threatening dangerous
"
400 deaths
!
"
4000 injured
!
"
200.000
!
€
1 billion
!

6. 3 breaths can be sufficient to die
1 breath can have lifelong consequences
“Where there's fire there's smoke”

7. of fires start at night where
human‘s sense of smell is asleep
70 %

9. Fire! Time to leave!
4 min
2 min

10. SMOKE DETECTORS are mandatory
In Germany2018
In France2015
In USA2010
h#p://www.fusac.fr/countdown3smoke3detectors/!h#p://www.rauchmelderpflicht.eu/download/Uebersicht_Rauchmelderpflicht.pdf!

11. Simple solution Advanced solution
vs.

12. Some ideas for improvements
01 Maintenance 02 03Connectivity Improved security

13. Showtime !

14. Inside of the House Outside of the House
Basic Architecture

15. Architectural Details - Outside of the house

18. Subscribe

19. Publish

20. temperature
sensor
MQTT-Broker
laptop
mobile device
publish: “21°C“
publish: “21°C“
publish: “21°C“
subscribe
subscribe
1
subscribe to
topic: “temperature“ 2
publish to
topic: “temperature“

21. Why MQTT ?
Bandwidth Efficient
Push Capability Works great behind a Firewall
Quality of Service Levels

22. Quality of Service

23. Topics – Topic Tree
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

24. Topics
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

25. Topics
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

26. Topics
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

27. Topics
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

28. Topics
myhome!
livingroom!
bedroom!
smoke3detector!
temperature!
smoke3detector!
temperature!
/! /!
otherhome!

29. • Open!Source!
• “Reference!ImplementaEon”!
• Many!languages:!Java,!Javascript,!Lua,!C,!C++,!Go,!Python!!
• AcEve!Community!
Eclipse Paho

30. Now some code!!

31. MQTT Publish
MqttClient mqttClient = new MqttClient
("tcp://localhost:1883", “publisher");
mqttClient.connect();
mqttClient.publish(“test","test123".getBytes(),0, true);

32. MQTT Subscribe
MqttCallback mqttCallback = new MqttCallback() {
@Override
public void messageArrived(String topic, MqttMessage mqttMessage)
{
System.out.println(topic +" "+ new String(mqttMessage.getPayload()));
}
};
MqttClient mqttClient = new MqttClient("tcp://localhost:1883", “subscriber");
mqttClient.setCallback(mqttCallback);
mqttClient.connect();
mqttClient.subscribe(“test",2);

33. MQTT broker

34. HiveMQ – at a glance
High Performance MQTT Broker ! ! Open Plugin System
Highly Scalable ! ! Supports Bridge Protocol
Clustering ! ! Native Websockets Support

35. MQTT Architecture
Publish
• Testalarm
Subscribe
• Alarm
• Status
• Battery Status
Publish
• Alarm
• Status
• Battery Status
Subscribe
• Testalarm

36. Webdashboard
Emergency
Service
any API
SMS
(Twilio)
Integration of other Services
SQL/
NOSQL!
Mobile!Devices!
MQTT!
P!
L!
U!
G!
I!
N!
JDBC/other
HTTP
MQTT!over!
Websockets!
MQTT!

37. Architectural Details - Inside the house

38. Smart Home Devices
Communication
• 868 MHz
• BidCoS®-Protocol
(„Bidirectional Communication
Standard“)
• Supports „AES signed
commands“
Devices
• Brand: HomeMatic
• Sold by eq-3 (ELV)
• Readily available
• Many different devices

39. Hardware
Software
Inside the House


Homegear
(v1.6.0)!
(v0.5.732)!
Raspberry Pi (Modell B)
CPU: ARM1176JZF-S (700 MHz)
RAM: 512 MB
Power: 5 V, 700 mA (3,5 W)
Busware CCD
• CC1101 transceiver
• ILI9341 based 2.8" TFT
Touch Display
• culfw firmware
Extras
• Transparent case
(busware)
• WiFi-Stick
• Antenna

40. Hardware
Software
Inside the House


Homegear
(v1.6.0)!
(v0.5.2436)!
Raspberry Pi 2 (Modell B)
CPU: ARM Cortex-A7
(4 x 900 MHz)
RAM: 1024 MB
Power: 5 V, 800 mA (4 W)
Busware CCD
• CC1101 transceiver
• ILI9341 based 2.8" TFT
Touch Display
• culfw firmware
Extras
• Transparent case
(busware)
• WiFi-Stick
• Antenna

41. OpenHAB by Example
“openHAB is a software for integrating different home
automation systems and technologies into one single
solution”
Core%Components%
Items% Protocol%Bindings% Automa6on%Logic%
Core Components were moved to eclipse:

42. OpenHAB by Example
Core%Components%
Items% Protocol%Bindings% Automa6on%Logic%
Alert!
Ba#ery!Status!
HomemaEc!
MQTT!
Raise!Alarm!
Propagate!
Alarm!

43. Again some code!!

44. Item definitions
/* Item format
TYPE ITEMNAME LABEL ICON (GROUPS) {BINDINGS}
*/
/* Group definitions */
Group:Switch:OR(ON,OFF) FireAlertDevices "Brandmelder"
/* Example item with binding */
Switch SmokeDetector1_Fire "Feueralarm Schlafzimmer" <fire>
(FireAlertDevices,Schlafzimmer)
{homematic="id=JEQ0736552, channel=1, parameter=STATE"}

45. Rule definitions
rule "Send MQTT messages on alerts"
when
Item FireAlertDevices changed
then
if (FireAlertDevices.state == ON) {
// we find the alerting sd and only send an alert for the "first responder"
var alertingSd = FireAlertDevices?.members.findFirst(sd|sd.state == ON)
var String mqttItemName = "MQTT_" + alertingSd.name
logDebug("MQTT", "Notifying mqtt item '{}'", mqttItemName)
postUpdate(mqttItemName, "ON")
} else {
logWarn("FireAlertDevices", "Ignored state change to " +
FireAlertDevices.state)
}
end

46. Integration with other components
It!might!get!loud!!

47. STEPS TO PRODUCTION
Hardening / Security Cloud
TLS, Authentication, Authorization, High Availability
01
Encrypt Inhouse Communication02
Sophisticated Hardware03
Platform Improvements04

48. Lessons Learned
!
POSSIBLE TO BUILD A SOLUTION
WITHOUT MUCH CODING
! THE SMART HOME WORLD
IS CHANGING RAPIDLY
!
INTERESTING OPEN SOURCE
SMART HOME TECHNOLOGIES
OUT THERE
!
FOCUS ON ADDED VALUE AND
INTEGRATE CERTIFIED SECURITY
SOLUTIONS

49. THANK YOU
!