A few weeks ago a bought a battery doorbell, I connected it my existing Homebase 1 system (kick starter project).
It works but it would be nice if the doorbell would give me motion sensor notifications, also the chime doesn’t seem the work on the Homebase 1.
Perhaps the doorbell can also use the awesome facial recognition chip on the original Homebase.
Otherwise I am really happy with the product, it was really helpful during corona outbreak as it allows me to interact with visitors without speaking face to face