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===== Setting Up OpenHab and Mosquitto on Pi =====
How to install OpenHab on Raspberry Pi 2 from scratch\\

  * Step 1: Download the latest image of Rasbian from;
https://www.raspberrypi.org/downloads/raspbian/

Choose the Lite version, you don’t need the GUI desktop…

  * Step 2: Write the image to a SD card

  * Step 3: Put the SD Card into the Raspberry Pi and connect the thing to Power and Plug in the Ethernet cable.

  * Step 4: Login to the Raspberry Pi via SSH using Putty
<code>
Username = pi
Password = raspberry
</code>
  * Step 5: Expanding the filesystem
<code>
 sudo raspi-config
</code>
in the next GUI select option “Expand filesystem”
Exit and Reboot…

  * Step 6: Install Java
<code>
sudo apt-get update && sudo apt-get install oracle-java8-jdk
java -version
</code>
  * Step 7: Install Mosquito
<code>
[Command to key:] wget http://repo.mosquitto.org/debian/mosquitto-repo.gpg.key

[Command to key:] sudo apt-key add mosquitto-repo.gpg.key
[Command to key:] rm mosquitto-repo.gpg.key
[Command to key:] cd /etc/apt/sources.list.d/
[Command to key:] sudo wget http://repo.mosquitto.org/debian/mosquitto-jessie.list
[Command to key:] sudo apt-get update
[Command to key:] sudo apt-get install mosquitto mosquitto-clients
</code>
  * Step 8: Start and Test Mosquito:
Open a second terminal or Putty window
<code>
[Command to key in the first window:] mosquitto_sub -d -t hello/world
[Command to key in the second window:] mosquitto_pub -d -t hello/world -m “Greetings from Terminal window 2!”
</code>
You will see the message appear in the First window if everything is OK.

  * Step 9: Install OpenHab:
<code>
[Command to key:] sudo mkdir /opt/openhab
[Command to key:] cd /opt/openhab
[Command to key:] sudo wget https://bintray.com/artifact/download/openhab/bin/distribution-1.8.1-runtime.zip
[Command to key:] unzip distribution-1.8.1-runtime.zip
[Command to key:] sudo rm distribution-1.8.1-runtime.zip
[Command to key:] cd addons/
[Command to key:] sudo wget https://bintray.com/artifact/download/openhab/bin/distribution-1.8.1-addons.zip
[Command to key:] sudo distribution-1.8.1-addons.zip
[Command to key:] sudo unzip distribution-1.8.1-addons.zip
[Command to key:] sudo rm distribution-1.8.1-addons.zip
</code>
  * Step 10: Install the Demo Configuration to start with
<code>
[Command to key:] cd ..
[Command to key:] cd /opt/openhab
[Command to key:] sudo wget https://bintray.com/artifact/download/openhab/bin/distribution-1.8.1-demo.zip
[Command to key:] sudo unzip distribution-1.8.1-demo.zip
[Command to key:] sudo rm distribution-1.8.1-demo.zip
[Command to key:] sudo chmod +x start.sh
[Command to key:] sudo ./start.sh (/opt/openhab/)
</code>
  * Step 11: Login to your Demo Sitemap:

On a computer in an internet browser goto:
<code>
http://xxx.xxx.xxx.xxx:8080/openhab.app?sitemap=demo
<code>
(replace xxx.xxx.xxx.xxx by your local IP address of your raspberry pi)

  * Step 12: Configure OpenHab to use a MQTT Binding:
<code>
[Command to key:] sudo nano /etc/openhab/configurations/openhab.cfg
</code>
At the very bottom define a MMQT Broker:
<code>
mqtt:broker.url=tcp://xxx.xxx.xxx.xxx:1883
mqtt:broker.clientId=openhab
</code>
(replace xxx.xxx.xxx.xxx by your local IP address of your raspberry pi)

Exit, Save
<code>
[Command to key:] sudo reboot
</code>
Close the Terminal window Wait for the system to reboot, open a new terminal window and login.
<code>
[Command to key:] cd /opt/openhab
[Command to key:] sudo chmod +x start.sh
[Command to key:] sudo ./start.sh (/opt/openhab/)
</code>
==== Sources: ====
<code>
https://www.raspberrypi.org/forums/viewtopic.php?f=81&t=135941
https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=97422
https://bintray.com/openhab/bin/openHAB/1.8.1/view#files
http://www.instructables.com/id/OpenHAB-on-Raspberry-Pi/
http://repo.mosquitto.org/debian/
https://openhardwarecoza.wordpress.com/category/openhab/
</code>