I have 4 Dahua cameras, one a few months older than the other three.
They are all IPC-HDW2431R-ZS
The older one has firmware 2.622.0000000.18.R, Build Date: 2017-11-10
The newer ones have firmware 2.622.0000000.23.R, Build Date: 2018-03-30
As far as I can tell configuration is the same between...