Old doorbell (12-26V AC) Shelly 1 ESPHome

Here is my way to do a old dumb doorbell smart.
I tried to find if somebody had done this but none of the solutions was what I needed or wanted.

Had one Shelly 1 laying around and wanted to use that one as smart relay.

Funktions I wanted:

  • Limit the time between button pushes, friends can’t irritate by pressing the button several times in a row
  • No MQTT
  • Notifications from Home Assistant.
  • Disable chime night time
  • Activate chime from phone, if I need.

I have used many guides and took inspirations from them to make my code.
My doorbell is an old one from around 1960, Friedland 752 doorbell. It is powered by a AC 230V to AVC 14V. Wanted to use all original components. Transformator, chime and button.

Shelly 1
AC-DC Converter AC 10-28V to DC 12V, I used gyvrm a121202
Wago connectors.

OTA flashed Shelly 1 with Tasmota firmware, OTA flashed Tasmota to ESPHome, by following these guides: (Search the internet for)
Shelly 2.5: Flash ESPHome Over The Air! | Savjee.be
Search the internet for: GitHub - yaourdt/mgos-to-tasmota: A minimal firmware for OTA (over the air) flashing Tasmota

I like to use “substitutions:” it makes it more easy to adjust delays.
Read that shelly 2.5 needes a “Prevent short circuit with “floating” pin”, I use it for Shelly 1 too…
(Search the internet for) Shelly 2.5 + ESPHome: potential fire hazard + fix | Savjee.be

Here is my yamal code

  friendly_name: Doorbell
  chime_delay: 20s        # Chime reactivation delay
  notify_delay: 30s       # Dummy sensor ON/OFF delay, used in automations 
  push_delay: 0.2s        # Button push release delay
  push_mobile_delay: 0.5s # Mobile push release delay

  name: doorbell
  platform: ESP8266
  board: esp01_1m

  ssid: !secret wifi_iot_ssid
  password: !secret wifi_iot_password

    ssid: $friendly_name Fallback Hotspot
    password: !secret wifi_iot_password

  port: 80
    username: !secret iot_admin
    password: !secret admin_iot_password


  password: !secret esphome_api_password

  password: !secret esphome_api_password

  - platform: wifi_info
      name: $friendly_name IP Address

  - platform: wifi_signal
    name: $friendly_name WiFi Strength
    update_interval: 60s

  - platform: uptime
    name: $friendly_name "Uptime"

  - id: chime
    type: bool
    restore_value: true
    initial_value: 'true'
  - platform: restart
    name: $friendly_name Restart

  - platform: gpio
    id: relay
    inverted: false
    name: $friendly_name Chime
    pin: GPIO4
    internal: true
  - platform: template
    name: $friendly_name Push Button
    id: push_button
    - switch.turn_on: relay
    - delay: $push_mobile_delay
    - switch.turn_off: relay

  # Creates a "virtual" switch based on a global variable.
  - platform: template
    name: $friendly_name Chime Active
    id: chime_active
    restore_state: false
      - globals.set:
          id: chime
          value: 'true'
      - globals.set:
          id: chime
          value: 'false'
    lambda: |-
      return id(chime);

# Doorbell button push.
  - platform: gpio
    id: button
    name: $friendly_name Button
    pin: GPIO5
      # Only turn on the chime when it is active.
            - switch.is_on: chime_active
            - switch.turn_on: relay
            - delay: $push_delay
            - switch.turn_off: relay
            - switch.turn_off: chime_active
            - binary_sensor.template.publish:
                id: button_notify
                state: ON
            - delay: $chime_delay
            - switch.turn_on: chime_active
            - delay: $notify_delay
            - binary_sensor.template.publish:
                id: button_notify
                state: OFF

 # Dummy button for notifications/automations
  - platform: template
    name: $friendly_name Button Notify
    id: button_notify

# Prevent short circuit with "floating" pin!
  - platform: gpio
    pin: GPIO16
    name: "ade7953 IRQ pin"
    internal: true
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Found the inspiring post that got me working on this:
Make a dumb doorbell smart with Shelly 1 - Share your Projects! - Home Assistant Community (home-assistant.io)

Wny, may I ask, did you flash tasmota? Seems sn unnecessary step.

Well… Shelly does not support custom ROMs trough OTA. But they accept Tasmota, and Tasmota accepts custom ROMs.
I did this before with Raspberry Pi, but I was lazy and did not want to pug it in.

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Quick question, if I may: Would a Shelly Uni (https://shelly.cloud/knowledge-base/devices/shelly-uni/) something that would work also, without the need of any AC-DC converter?

I think it would, uni’s specs says 12-24V AC… but I did not have one, so I used Shelly 1 that I had laying around.
Now when I look back… I should had ordered uni and wait for the delivery… I might change the Shelly and use it in an other project… uni is smaller and more easy to fit inside the doorbell.