UniFi WiFi Password QR Code Generator

[!NOTE] Note Unifi provides a guest portal, which might be overkill for the home, so I over-engineered a solution using Node-red

We often have guests, repair people, or our friendly neighborhood kids visiting our home, and they almost always want the guest's Wi-Fi password. The annoyance (not really) of having to repeat the password became the mother of invention for this flow.

The flow requires the following palettes:

node-red-contrib-bigtimer
node-red-contrib-image-tools
node-red-contrib-unifi

You'll have to use the Unifi node to identify the exact ID of your guest network or visit the console URL and pull it from the URI.

The steps are:

Decide your rotation cadence
Delete the existing QR Code Image, as I ran into some caching issues with the home tablet
Use a function to generate a random password
Use a function to create a payload with the following:
1. setWLANPassword;
2. wland_id
3. x_passphrase that was generated in the previous step
Use a function to create a payload with the following:
1. SSID name;
2. Encryption type;
3. Password that was generated in the previous step
4. Create a string for the QR code
Generate a random color for the QR code that's displayed on the home tablet
Generate the QR code
Write to disk
And as a last step, display the QR code in the node-red flow

The generated QR code is displayed on the home table via the Home Assistant companion app. I use the refreshable-picture-card from the HACS store to refresh the image on the dashboard to ensure it's up-to-date.

Note: some third-party nodes may appear with blank styling, and not as they appear in the Node-RED Editor.

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i < 6; i++) {\n        color += letters[Math.floor(Math.random() * 16)];\n    }\n    return color;\n}\n\n// Set random colors for the barcode and background\nmsg.options = {\n    barcolor: getRandomColor(),\n    backgroundcolor: \"FFFFFF\"\n};\n\nreturn msg;\n","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":900,"y":280,"wires":[["6bb59c683a390683"]]},{"id":"c2ddc55355aa240b","type":"file","z":"79d153f10dbb34e1","name":"Delete Existing","filename":"/homeassistant/www/qr-code.png","filenameType":"str","appendNewline":true,"createDir":false,"overwriteFile":"delete","encoding":"none","x":240,"y":240,"wires":[["c7c550f896e3f384"]]},{"id":"5a597a758468f802","type":"comment","z":"79d153f10dbb34e1","name":"Generate Random WiFi Password","info":"","x":280,"y":100,"wires":[]},{"id":"d4ee8e33449c822a","type":"unificonfig","name":"","ip":"10.0.0.1","port":"443","site":"default","unifios":true,"ssl":true}]