Nest Hello and Nest door bell 2nd Gen Wiring Diagram

[ktvasan]

I have a Chime with 2-door configuration, Currently, I have Nest Hello wired at the front door installed, and it is working fine with no issue on that, Now I have a Nest doorbell 2nd Gen and want to install that for my rear door. For some reason I am not getting sounds at my Chime from the rear door Cam, the front door (Nest Hello) is working as expected. Can I have any wiring diagrams or any suggestions? on how to fix it?

I get a notification from my rear door cam, but the sound is missing.

[MplsCustomer]

@ktvasan 

Unfortunately, Google Nest does not seem to provide a diagram showing a 1st gen Google Nest Hello's 4-wire chime connector along with a 2nd gen Google Nest Doorbell's 2-wire chime connector. They do have a diagram for 2 1st gen doorbells (incorrectly labelled "Two Nest doorbells, two chimes"; it should say "Two Nest doorbells, one chime"):

https://support.google.com/googlenest/answer/12153643

Have you checked your doorbell transformer? These are Google Nest's requirements:

https://support.google.com/googlenest/answer/9247132

Some customers in this forum (including us) have upgraded to a 16V 30VA transformer; we did so when we got a 2nd Google Nest Hello Doorbell years ago, and the 2nd doorbell would not ring the indoor doorbell chime.

[ktvasan]

Thank you for the detailed answer. Its helpful