Howto setup a RaspberryPi with openHAB and mosquitto

# Instructions

## Content
1. Install OS
2. Connecting to the Pi
3. Setting up Raspian
4. Enable secure login 
5. Install openHAB
6. Install mosquitto

## Install OS

1. Download OS image [raspberrypi.org](https://www.raspberrypi.org/downloads/raspbian/)
2. Burn file to SD card
3. Boot the Raspberry Pi

## Connecting to the Pi

First you have to find out what IP address your Pi got in the network. 
Later with will set a static IP, but for now the find the dynamically assigned IP address.

* On Windows you can use *Advanced IP Scanner*
* On Linux you can use `>> arp -a` to list all addresses. 

1. Download [PuTTy](https://www.element14.com/community/external-link.jspa?url=http%3A%2F%2Fthe.earth.li%2F%7Esgtatham%2Fputty%2Flatest%2Fx86%2Fputty.exe)
2. Enter host name (the IP address of the RPi)
3. Post: 22
4. Connection Type: SSH

Press **Open...**
The default user is *pi*
And the default password is *raspberry*

## Setting up Raspbian

### Assign a static IP address

1. Show ifconfigs

```
>> ifconfig
inet addr: 192.168.78.51
Bcast: 192.168.78.255
Mask: 255.255.255.0
```

2. Show netstat 

```
>> netstat -nr
Gateway: 192.168.78.254
Destination: 192.168.78.0
```

3. Edit config

```
>> sudo nano /etc/network/interfaces
```

Change 

```
iface eth0 inet dhcp
```

to

```
iface eth0 inet static
```

### Raspberry Pi setup references

* [Nice guide on how to setup Raspberry Pi](http://www.element14.com/community/community/design-challenges/forget-me-not/blog/2014/08/02/how-to-setting-up-your-raspberry-pi)
* [Tutorial how to give your raspberry pi a static ip address](http://www.modmypi.com/blog/tutorial-how-to-give-your-raspberry-pi-a-static-ip-address)

## Install openHAB

Get openHAB: 

```
>> cd openHAB
>> wget https://bintray.com/artifact/download/openhab/bin/distribution-1.7.1-runtime.zip
>> wget https://bintray.com/artifact/download/openhab/bin/distribution-1.7.1-addons.zip
>> wget https://bintray.com/artifact/download/openhab/bin/distribution-1.7.1-demo.zip
>> unzip <files> /opt/openhab/1.8.3/.
```

Make openHAB auto-start after reboot. 

1. Downloads scrits from: https://mcuoneclipse.com/2015/12/24/autostarting-openhab-on-raspberry-pi/
2. Move openhab to /etc/init.d/ directory
3. Update paths to openHAB in openhab.conf
4. Move openhab.conf to the /etc/default/ directory

## Install mosquitto

Mosquitto is the mqtt broker and will be used to distribute messages between the #IoT-nodes and openHAB.

### 

1. Goto [Mosquitto](http://mosquitto.org/2013/01/mosquitto-debian-repository/)
and follow the instructions to install 

### Testing mosquitto

Start mosquitto:

``` 
>> mosquitto -v -c /etc/mosquitto/mosquitto.conf
```

Subscribe to all topics 

```
>> ./mosquitto_sub.exe -v -h 192.168.78.40 -t "#"
```

Publish a test message on some topic: 

```
>> ./mosquitto_pub.exe -h 192.168.78.40 -t "test/" -m "Hello World"
```

If message received properly, mosquitto is up and running! 


### Mosquitto references:

* http://mosquitto.org/2013/01/mosquitto-debian-repository/
* http://blog.thingstud.io/recipes/how-to-make-your-raspberry-pi-the-ultimate-iot-hub/
* http://jpmens.net/2013/09/01/installing-mosquitto-on-a-raspberry-pi/
* [Enable logging](http://www.switchdoc.com/2016/02/tutorial-installing-and-testing-mosquitto-mqtt-on-raspberry-pi/)
* https://www.youtube.com/watch?v=PgsH43Tpqjc

The Mosquitto installation doen't work at all