Realtime bandwitdh/traffic speed from Unifi Dream Machine Pro into MQTT

I wanted to display realtime Internet traffic data on my dashboards. This information is available in Unifi Controller on my UDM-Pro. (Only works with UDM PRO at the time of writing, not with standalone controller as far as I know. Please comment if you have an solution).

1. Install this Node-RED plugin: node-red-contrib-unifi-os
2. Add the new node to your flow. Enter configuration for the node. Add an "Controller" with your ip & credentials
3. Use this endpoint:

   /proxy/network/wss/s/default/events

4. Add a switch node that switches

   msg.payload.meta.message 

   with string match

   device:sync

   This is the message that will contain realtime bandwidth info
5. Add the following function node to fetch the bandwidth data. You may need to correct according to your setup (wan1/wan2).

   if(msg.payload.data[0].hasOwnProperty('wan1'))
   {
       var m = {}
       m.payload = {}
       m.payload.rx = (Number(msg.payload.data[0].wan1.rx_rate)/1000000).toFixed(1);
       m.payload.tx = (Number(msg.payload.data[0].wan1.tx_rate)/1000000).toFixed(1);
       return m;
   }
   

6. Add an output node to publish to MQTT

This shows the complete flow, really simple!