Hello!!
I own 3 of the following cameras:
Dahua WIFI 3MPX
Model: IPC-HFW1320S-W
System (Up to date) Version : 2.400.0000000.16.R, Build Date: 2017-08-31
But all of the sudden two of them stopped responding at the admin web interface, still work, recording locally at the MicroSD, and still...