I’m interested, if for no other reason than curiosity. Having said that, you never know when it might come in handy. I can for instance, get the serial numbers from my fishing cabin, without going, and I forgot to get them when I installed the system. Plus one camera, is all but inaccessible there, so I can definitely make use of this trick.
I was curious, and just got the mac address from my router table, and converted each block from hex to decimal in Excel, but I see no obvious correlation between that and the serial number, which looks like decimal.
So I can’t see the link, and would be interested to know. I’m sure many others would find it handy too.