Different things work for different people. It would probably be best if you asked your questions in some of the many existing threads on doorbell projects, since then you can talk to people who are actually using the various methods.
You can find these quickly by using the quick browse lists in the community – created wiki, looking down near the bottom of the page for the project report section, and then choosing the “doorbell“ list.
The Nexia DB100Z doorbell sensor appears to work great for some, but others including myself occasionally miss quick doorbell button presses. I suspect the problem is with how powerful your doorbell transformer is and whether it can generate the 14AC voltage needed to trigger the device during those quick presses.
Some users have reported good results after updating/upgrading their doorbell transformers. I may investigate this at some point, but in the meantime I’m using the Sage doorbell sensor which is/was a very reliable device that had the added advantage of supporting two separate doorbell buttons. Unfortunately as @JDRoberts mentioned, the SAGE product line was discontinued. I look around now and again in the hopes that Echostar or other 3rd party would re-market some of the SAGE devices, but no luck so far.
I originally tried that, but for whatever reason, in my home the vibration sensor would get triggered with a door slam on the same wall and even occasionally with my dog barking nearby. As usual with these implementations, YMMV.
any standard door chime works with the home depot transformer i linked you which is 16v10A but you got to remember if you are adding something else to power up from the transformer you will likely need more like 16v30A. Who knows, you might be the lucky one.
no higher va will not explode your chime as your chime will only take what is needed from the 30va.
i asked my electrician friend long ago before i changed to 16v30va if it be too much and ruin the system or have any electrical issues. he said You can’t go too high on the volt/amp(va) rating. That is just the maximum the transformer can supply. If you need less no problem.
The voltage is the critical value. If your existing system is 16 volts then you need 16 volts.
and most doorbell systems are standard 16volts
so you should be good for 16v30va as long as your existing chime or new chime is asking for 16v
I have a 16vac standard door bell. I used a relay and a xiaomi contact sensor. I unsoldered the reed switch on the contact and soldered pig tails to connect it to the relay. Press the door bell and it triggers the relay which closes the contact and then sends an sms plus an announcement through the house. I even added a switch between the relay and chime to turn off the bell, no more dogs going crazy when the door bell is pressed. I’m on vacation now but when I get back I can go into more details with pics if you’d like.
Try this dry relay with two wire ports from “AEOTEC BY AEON LABS Z-WAVE PLUS DRY CONTACT SENSOR GEN5 ZW097-A”. I beleive you will not need to add a transformer to it as it is self powered by a battery. You can add two wires to it and connect it directly to the connection point on your mechanical doorbell. All you will have to do is change device type DH in the IDE to be “Momentary Capability”.