DS-KIS202T
DS-KIS204T
these for example are hikvision analog door phones. would it be possible to integrate these into home assistant?
their documentation shows four wire video door phone and this also has support to open the door lock so could that be integrated as well?
You won’t be able to get the video into HA short of using a video capture device to digitize it (it would be cheaper to buy a digital doorbell system) but if you wanted to integrate the lock control you could use an ESP (running ESPhome is best) and a relay to run in parallel to the doorbells lock relay.
That’s as good as you will get short of cracking it open and wiring things inside to potentially interface to the button. (could wire that to the same ESP as an input) At this point you may as well have thrown the ancient thing in the bin and bought something from this decade.