Hi Hikaru, your post is my saviour! Could you share with me which transformer you have purchased? I going to install exactly the same thing. And i have few questions below if you don't mind I ask. The thread is a bit long to read.

1. where should I install the transformer? between doorbell and power supply?
2. Is the transformer lasting? I heard some ppl comment that low quality transformer will kill the doorbell.

Thanks

I have chime inside and an existing doorbell outside. I have bought the same set from August, the final thing I wanted to integrate is the Doorbell Cam Pro.

If I understand it correctly,

The sequence in my case should be

AC supply --> existing chime --> transformer/adapter (step down to 24VAC) --> exit chime box --> August Doorbell Cam Pro --> enter chime box --> transformer/adapter (possible to step up again?) --> chime

And I need to change the chime to have the ding dong sounds if step up is not possible. if I need to change the chime, I need something that works with 16-24VAC just like the doorbell.

So, if I need a chime of 24VAC, the setup sequence is

AC supply -> transformer -> new chime -> doorbell -> new chime.

Im have a technician who is helping me on this. It has been ding dong for some days, I need a get a better understanding.

Many thanks

I can answer you on this. I have been using it for 2 months now, the smart lock and connector. It works good. The connector has to be real close to the smart lock. My setup is about 1 meter.