Okay guys I wanted to have my own smart doorbell to add to my home automation setup. I lke the idea that was shared by armand janssen. I orderd all the items and they are send so I hope to receive them soon.
Anyways currently my setup is like this:
So based on the wiring image shared by armand i was just drawing my idea into a wiring image:
But as you can see I dont believe this will work or maybe even kill my esp and relais setup.
anyone who can help me out 
For me i used a cheap 433MHz wireless doorbell which is also read by the equally cheap sonof rf bridge, which then relays an mqtt to HA.
Ok I made some better diagrams. Still not able to get it to work.
hereby my current situation:
So I tried to insert my wemos d1 + relay in between. but no effect.
If I press the button I dont hear the bell
Shoul I connect the power from the fuse box to the COM or NO port?
I have update my last input somebody who can help me? It is wired as shown but no sound currently. 
Your schema looks ok. I donāt understand your doorbell in the drawing, but looks good.
Do you hear the physical click from the relay?
Did you configure the correct port?
I dont hear anything as far as I have tested.
I have connected the doorbell wire to D2 and the other one to GND.
As mentioned in the code.
this a photo of my doorbell gong and the wiring.
Did you put the relay correctly on the wemos ? Soldered it?
Try with a simple buzzer or led instead of your doorbell.
This to test the relay. It should give a click sound like in https://youtu.be/zup17vYASlU
This is great and I feel like if I was smarter I wouldnāt need a follow up question butā¦
on my ubuntu pc thats running Hass.io in docker I have setup moquitto. Basic install expect a different port.
Its running lights and my doorbell. The lights are fine but for the doorbell automation I use a MQTT trigger.
That one has the same issue has christian.ek mentioned.
When I try to run the moquitto_pub command I get an error " Error: Connection refused"
Its definately user error but is there anyway you can help clarify running the _pub command? I tried stopping the MQTT service and running _pub -t HA -r -n but got the same error.
I think hassio sets up a required username and password for mosquitto, so you nee
mosquitto_pub -t your_topic -r -n -u username -P password
I think the password parameter is a capital p, but I donāt use them myself so I may be remembering incorrectly.
So I bought the DB Modernizr from @ErikNL in the interest of just getting it hooked up and done with. Unfortunately I am getting constant triggers.
I have a 24v transformer wired to a LaView PDB1520F1 video doorbell, which is then wired to my chime. I have not traced all the wires as they all change colors a gauge, but I am getting a constant 2.2v at the chime terminals. Erikās DB Modernizr is wired in parallel at the chime. I created pigtails from the chime terminals and wired in the leads from the doorbell and pigtails from the DB modernizr. Is the constant 2.2v what is causing the constant triggers? I do not know yet what the change in voltage is when the door bell is pressed as my assistant (my better half) is out of town at the moment. Do I have to add resistors in series with the leads to the DB Modernizr?
Since the4 Modernizr works roughly the same as my bell, I would expect 0 voltage when nog pressed and 5v when pressed (when connected to ground and a pin on the Arduino). So the pin goes from ādownā to āupā.
try 1001 
i have found a wiring diagram.
Its a two chime doorbell. Have an ESP wemo D1 mini and relay.
I have tested the relay and it works. (seperate code) the main issue is the wiring with the ESP in between.
If this does not work I will consider taking away the bell and just have some sound send to my bluetooth speaker instead of. But the is a worst case scenario.
THANKS
Please I need to make this work
I have the same issue.
before with my stupid doorbell everything worked fine.
Now with my smart doorbell itās giving continous triggers.
Did you fix it?
Hi fietspomp yes fixed it.
I found another guy who did this and I managed to make it work. Did not believe it but it does work.
I will share the link tomorrow
For now. Google activate sleep mode
If you need some assistance just send me a pm
Ok, so I investigated and I have the version 1.2 of the Doorbell Modernizer.
There is a resistance of 10Kohm soldered in between the 3.3V and the input pin.
I replaced this 10Kohm with a 3K3 ohm and now it works! No more false triggers!
Ok small update: After a while I had a few false triggers!
I was also struggling with Arduino so I decided to go ESPhome.
This works perfect and also, without delay, no more false triggers!
If anyone is interested, I can paste the code here.
Would love to see what you did to make it work (hardware and code). What voltages were you getting at standby and on doorbell press?
I gave up on it for awhile and was going to go with a reed sensor next to the solenoid but that wasnāt working for me either (worked fine on the bench, probably due to cable length). Iāve shelved this project again as a result
I already replaced the DBModernizr along with my SmartThings sensor for the front door sensor with a regular Wemos flashed with ESPHome, a reed switch for the door and DHT11 for temperature/humidity. Basically I have again the same functionality as I did with the SmartThings sensor except no battery.
I didnāt check the voltages to be honest.
Hardware wise, I have version 1.2, so itās working via GPIO16 which doesnāt support internal pullup.
In this case, on the bottom of the board, thereās a 10KOhm resistor soldered between input and 3.3V.
This 10KOhm I replaced with 3K3Ohm. But to be honest Iām not sure if this was even necessary.
The newer version uses the internal pullup of GPIO 14, so I donāt know if that one works better/worse.
After this I only got a few false triggers. Which still bothered me.
The Arduino code was also bothering me, I like ESPHome much better.
Figured it wouldnāt be so hard to make it work. Hereās the code:
esphome:
name: doorbell
platform: ESP8266
board: esp12e
wifi:
ssid: "xxxxxx"
password: "xxxxxxxxx"
manual_ip:
static_ip: xxx.xxx.xxx.xxx
subnet: 255.255.255.0
gateway: xxx.xxx.xxx.xxx
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Doorbell Fallback Hotspot"
password: "xxxxxxxxx"
captive_portal:
# Enable logging
logger:
# Enable Home Assistant API
api:
ota:
web_server:
port: 80
binary_sensor:
- platform: gpio
device_class: sound
pin: GPIO16
name: Deurbel
filters:
- invert:
- delayed_off: 5000ms
switch:
- platform: gpio
pin: GPIO12
internal: true
name: Reset
on_turn_on:
then:
- switch.turn_on: switch_12
- platform: restart
id: switch_12
name: "Restart"
As you can see, easy.
The 5 second delay is so that when the button is pressed, it doesnāt immediately send other notification when itās pressed again quickly (Like the mailman does).
GPIO 12 is the reset button.
GPIO 16 is the input for the octocoupler. Of you have a newer version (1.2a or 2.0), use GPIO 14.
Good luck!
Impressive work, guys!
Iāve been struggling with false alarms myself on a similarly setup doorbell (ESP-01S+ Relay) and Iām considering switching to a D1 mini.
Question: apart from false alarms have you seen an alarm/ring every time the D1 mini starts?
Sometime we have power outages during the night and when power comes back on my doorbell ringsā¦ waking up the house
So I bought the Doorbell Modernizr as well, but after succesfully connecting it to Hassio, I constanly get the following errors (whenever I press the ringer):
*** PAYLOAD IS NOT VALID JSON DATA ***
Unexpected character ('o' (code 111)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
at [Source: java.io.StringReader@3e996f15; line: 1, column: 2]
Anybody knows what could be causing this issue?