Solved: Wiring Nest Hello with Nest Doorbell 2nd Gen (wired)

[DustyDad]

Moderator edit: Subject updated for clarity and findability.

I just upgraded my front doorbell to Nest Doorbell 2nd gen (wired) from a Nest Hello.  Everything went well.  I had to disconnect the Nest Hello chime connector and replace it with the 2nd gen one.  I’d like to relocate the Nest Hello to my rear door now but I’m unsure how to wire the chime.  I can find several wiring diagrams: Nest Hello with Nest Hello, Nest 2nd gen (wired) with Nest 2nd gen (wired) and combinations of each with a regular doorbell.  However, I can’t find a diagram of 1st gen with 2nd gen Nest doorbell.  The 1st gen Nest doorbell has 4 wires and the 2nd gen has 2 wires.  Can someone please assist?

[MplsCustomer]

@DustyDad 

When other customers in this forum have requested such a diagram, Google Nest's response has been to tell them to contact a Nest Pro. Maybe this time a Google Nest Community Specialist will step in and provide a diagram.

If not, you may just have to use the diagrams for the 1st gen and 2nd gen doorbells and combine them yourself and hope for the best.

(We're still on 1st gen Nest Hellos, with two of them wired to the same chime.)

[DustyDad]

@MplsCustomerThanks for the reply.  I did see, after I had posted, a post asking the same thing I did.  They did refer to contacting a Nest Pro.  This seems like something that should be supported.  Both products are Nest.  Seems like something that wouldn't be entirely uncommon either.  Better to give good information as to how to safely wire the product.

I did try to hash out a diagram I think will work.  I have not tried it yet.  Here it is: https://ibb.co/7rHckQR 

In the example I have my Nest Hello hooked to the rear bell and my 2nd gen Nest doorbell (wired) hooked to the front bell.  I'm missing the diagram showing in from transformer but that just stays hooked up to the "Trans" in the diagram.

Does this make sense?

[MplsCustomer]

@DustyDad 

I'm not following your diagram (below); I don't understand the 1st and 2nd gen chime connectors in the diagram. Your 1st and 2nd gen doorbells should NOT share a chime connector.

I think (but am not certain) that you'd wire your Nest Hello with its 1st gen 4-wire chime connector as shown in the diagram for 1 Nest Hello and 1 Chime in this post:

https://www.googlenestcommunity.com/t5/Cameras-and-Doorbells/Wiring-diagram/m-p/24455

And then you'd wire your 2nd gen Google Nest Doorbell with its 2nd gen 2-wire chime connector as shown in the diagram for 1 doorbell, 1 transformer, and 1 chime connector on this Help page:

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

Your diagram

[DustyDad]

@MplsCustomerI'm going based on the diagram from https://www.googlenestcommunity.com/t5/Cameras-and-Doorbells/I-would-like-to-add-an-additional-nest-... .  The two Nest Hellos share a connection there.

I currently have it setup based on the article you linked at https://support.google.com/googlenest/answer/12153643 .  Specifically the one with "One Nest doorbell, one standard doorbell, one chime".  I just want to add the Nest Hello instead of the standard doorbell chime.

I'm not an electrician but the way I think about it is that joining the Nest Hello and Nest doorbell 2nd gen (wired) chime connectors together makes it share the Transformer power from the Nest Hello chime connector.  At least that's my thought.

[MplsCustomer]

@DustyDad 

I just don't know, since the 1st and 2nd gen chime connectors are different, and are wired differently.

It's unfortunate Google Nest won't provide a wiring diagram, since they know the chime's specs and we do not.

[DustyDad]

@MplsCustomerI agree.  I even had an electrician friend of mine look at this and he said without a wiring diagram he can't be certain.  I'm just concerned of damaging any equipment with improper wiring.

[EmersonB]

Hi everyone,

@DustyDad, thanks for reaching out here in the Community. We would suggest you contact a Nest Pro to properly wire your doorbell system at your house. Let us know if you have more questions.

I appreciate the help, MplsCustomer.

Best,

Emerson

[MplsCustomer]

@EmersonB 

Does this mean that Google Nest is once again refusing to provide a sample diagram showing one Nest Hello Doorbell and one 2nd gen Google Nest Doorbell connected to one chime?

[DustyDad]

I worked on this tonight.  Used the following diagram from my electrician friend.

Everything is working just fine.  2 minor issues along the way.  Had to move my Nest Connect closer for setup, but it’s working fine when I moved it back to where I had it.  Also the indoor chime defaulted to off so I thought something was wrong with the wiring, but I changed it in the app and it was fine.

Basically if you ignore the 2nd gen doorbell and just keep those wires in place and just wire it up according to just having one Nest Hello then it should work.

Keep the requirements for power in mind.  I have a 24V+40VA transformer.  This transformer to be precise.  See the power requirements here .

In the next day or two I’ll try to post a better diagram.  Here’s two real life pictures of what I did until then:

 

Hopefully this helps someone.  Take note I am not a qualified electrician, far from it.  I am not affiliated with Google or Nest in any way.  I got some help from a friend and felt confident enough to give this a try.  I am not responsible for what you choose to do, I am just saying what has worked for me.  Nest’s line is to consult a Nest Pro as you can see above.

I wish Google Nest would release official documentation on the recommended wiring for their product.  That would make things much better.