Actually, if door unit is able to communicate with indoor unit over wifi after a power loose, that should be fine. The hik-connect app can be configured to talk to the indoor station (lcd panel) not the door station. This is how it worked before this latest firmware.
Thanks @tomsmark. Unfortunately i can find only revision A for sale.
Do you know if the problem happens also when the communication with hik-vision is done trough an indoor device (DS-KH6320-WTE1 or DS-KH8350-WTE1)? like before firmware 2.1.5 200904 ?
if I understood right, the device will...