I’m new to this as well and was getting confused by the step - Install the zha-network-visualization-card lovelace card.
I wasn’t sure where or how to install it, but after quite a few hours of research I found that you download the zipped file from the indicated github and then extract the folder and use your preferred method to transfer the zha-network-visualization-card.js to your home assistant config folder (I use Samba) and place the file in the/www folder (if the www folder doesn’t exist create a www folder). Inside the new www folder create a folder named zha-network-visualization-card and place the .js file of the same name in the folder.
it should look like this
Once you’ve added the folders and the file go to your Lovelace overview page and open the Configure UI (top right corner) then press the button again and open Raw config Editor and add the following lines to the top of your file.
- type: module
If you already have a resources: line don’t add another just add the lines below it to your existing resources: line.
Also you might have noticed that the url: above shows /local/ and not the /www/ that we created before. Home Assistant looks in your /www/ folder when you use /local/.
Once this is all done save your changes and leave the editor to confirm and load all of your changes check your config and reboot.
Once it back up you go to overview and open configure ui (top right corner) from here you can add a new view by clicking the + symbol next to home tab at the top left. This opens a View configuration window where you can name the new View but the only thing we are concerned with for now is the toggle at the bottom left that says panel mode. From there you can save and Home Assistant will create a new tab next to your home tab (Home Assistant call the screens Views). Open this new View which will be empty, at the bottom right click the + for cards window. Choose the manual card type and a card configuration window will open, this is where you will add
save and exit UI configurator, from here I restart Home Assistant and then once its back go to Developer Tools then open the Services tab and choose the zha_map.scan_now service and click call service button, you can check your logs for details and from there your new map card should show up for you.
As I mentioned in the beginning I’m new to this and I hope this helps.