Requirements. 

• Home Assistant OS: https://www.home-assistant.io/installation/
• Z-Pi 800
  
  

Hardware Recommendations.

• Raspberry Pi 3 or later
• microSD card (at least 32GB and class 2; recommended 128GB SanDisk MAX Endurance for future proof or camera recordings)

If you're installing Z-Wave JS to MQTT on a fresh installation. 

These steps assume that you have a fresh install of Home Assistant and have not yet installed Z-WaveJS to MQTT. If you've already installed Z-Wave JS default integration and want to install MQTT, please follow the section "Change to Z-Wave JS to MQTT if you've already installed Z-Wave JS" at the bottom of this article.  

If you have a fresh install, you may follow the steps below to fully install Z-Wave JS to MQTT. 

1. Gain access to the community repository first.

1. Open Home Assistant, http://homeassistant.local:8123/
2. Click Setting
3. Click Add-on -> ADD-ON STORE (button at bottom right)
4. Click top right icon (vertical 3 dot icon)
5. Select Repositories
6. Input: 
   https://github.com/hassio-addons/repository
7. Then click ADD

Install and use Z-WaveJS UI

1. Open Home Assistant, http://homeassistant.local:8123/
2. Click Setting
3. Click Add-on Store
4. Search for "ZWave"
5. Click Z-Wave JS UI
   
    
6. Click Install, then wait about 2 minutes and 45 seconds for the installation to complete
7. Click Start, takes about 24 seconds.
8. Wait 1 minute for HASS to boot up Z-Wave JS UI
9. Click "Open Web UI"
10. Click Menu (hamburger icon) -> Settings
11. Click Zwave
12. Click Serial port and select /dev/ttyUSB0
13. Next to Network Key, click the refresh button to add a random security key for S0 Legacy, S2 Authenticated, S2 Unauthenticated, and S2 Access control.
    
    

    

    image 1 - randomize key buttons.

    

    image 2 - randomized network keys generated.
    
    
14. Click Save
15. Click Control Panel, and see if the driver boots up properly. If it does, the controller should appear in the control panel. 
    
16. Click Settings -> Devices & Services
17. Click + Add Integrations
18. Search ZWave
19. Click Z-Wave JS
20. Uncheck "Use the Z-Wave JS Supervisor add-on"
21. Click Submit
22. Copy and Paste "ws://a0d7b954-zwavejs2mqtt:3000"
23. Click Submit
24. Set your devices to the areas they are installed in, then click Finish

Change to "Z-Wave JS to MQTT" from "Z-Wave JS".

You may change from Z-Wave JS over to Z-Wave JS to MQTT but will require a bit of extra setup to finalize it. Once you have both Z-WaveJS default integration installed and MQTT, you can swap between MQTT and the original Z-WaveJS to MQTT integrations as you like.

You can follow the steps below to change from Z-Wave JS -> Z-Wave JS to MQTT. 

1. Go to Configuration -> Integrations
2. Under Z-WaveJS click on the More Options icon (3 dot) then select Disable -> OK
3. Click on Supervisor -> Z-Wave JS -> STOP
4. Wait a moment for Z-Wave JS to stop. Once it finishes, Enable Z-Wave JS to MQTT following one of the 2 steps below:  
   1. If you haven't installed Z-Wave JS to MQTT:
      • Click on Add-on Store tab
      • Find Z-Wave JS to MQTT and Install this
      • Now click INSTALL, give it about 2-3 minutes to finish the installation.
      • Click START, then wait about 10 seconds before continuing these steps. 
      • When ready, click on OPEN WEB UI
      • Click Menu (hamburger icon) -> Settings
      • Click Zwave to expand it
      • Click Serial port and select /dev/ttyUSB0 
      • Next to Network Key, add the original network key you used in the original ZWaveJS add-on, if you didn't previously have a network key, go ahead and press the Refresh button to randomly generate a key.
      • Click Save
   2. If you have Z-Wave JS to MQTT installed, just enable it and ensure your Z-Stick is connected to it properly. 
      • Click on Z-Wave JS to MQTT
      • Click START, and give it about 10 seconds to finish booting up. 
      • If you want to ensure your Z-Stick is connected, click on Log at the top right then click on Refresh.
5. Go to Configuration -> Integration
6. Click + ADD INTEGRATIONS
7. Search Z-WaveJS
8. Select Z-WaveJS
9. Uncheck "Use the Z-Wave JS Supervisor add-on" then press SUBMIT
10. Copy and Paste "ws://a0d7b954-zwavejs2mqtt:3000"
11. Then press OK
12. If it states "Device is already configured" click on CLOSE and follow these steps to finalize.
    1. At the top right next to "X disabled" click on SHOW
    2. Z-Wave JS should appear, click on ENABLE under it. 
    3. Now refresh your browser

Change to "Z-Wave JS" from "Z-Wave JS to MQTT"

If you want to remove the use of MQTT and swap to the default Z-Wave JS supervisor addon, you may follow these steps to utilize Z-Wave JS addon instead of MQTT.

1. Go to Configuration -> Integrations
2. Under Z-WaveJS click on the More Options icon (3 dot) then select Disable -> OK
3. Click on Supervisor -> Z-Wave JS to MQTT
4. We need to have a copy of your network key first which you may need if you haven't installed Z-WaveJS originally. 
   1. Click on OPEN WEB UI
   2. Click on Main Menu (hamburger icon at top left)
   3. Click Settings -> Zwave
   4. Copy the "Network key" and save that in a notepad somewhere for later use.
5. Now click on Supervisor -> Z-Wave JS to MQTT -> STOP
6. Wait a moment for Z-Wave JS to MQTT to stop, and click the back arrow. Enable Z-Wave JS following one of the 2 steps below:  
   1. If you haven't installed Z-Wave JS:
      • Click on Add-on Store tab
      • Find Z-Wave JS and Install this
      • Now click INSTALL
      • Once finished, START and UNINSTALL will appear. Before you boot it up, you'll need to configure it first. Click on "Configuration"
      • Click on "device" and select /dev/ttyUSB0 
      • Copy and paste your Network Key from "Z-Wave JS to MQTT" that you saved in step 4. 
      • Click on SAVE
      • Click on Info, then click on START.
   2. If you have Z-Wave JS installed, just enable it and ensure your Z-Stick is connected to it properly. 
      • Click on Z-Wave JS
      • Click START, and give it about 10 seconds to finish booting up. 
      • If you want to ensure your Z-Stick is connected, click on Log at the top right then click on Refresh.
7. Go to Configuration -> Integration
8. Click + ADD INTEGRATIONS
9. Search Z-WaveJS
10. Select Z-WaveJS
11. Keep "Use the Z-Wave JS Supervisor add-on" checked, click on SUBMIT.
12. If it states "Device is already configured" click on CLOSE and follow these steps to finalize.
    1. At the top right next to "X disabled" click on SHOW
    2. Z-Wave JS should appear, click on ENABLE under it. 
    3. Now refresh your browser