Galexrt Esphome
Voltage - ADC
This is the config and board I use to detect the door bell buzzer "ringing" for my apartment using ESP32-WROOM-32 boards.
This is the config and board I use to detect the door bell buzzer "ringing" for my apartment using ESP32-WROOM-32 boards.
Before you do anything involving power, please make sure to use a Multimeter and/or contact an electrician before you hurt yourself.
Components
- 1x ESP32-WROOM-32 (probably will work wither other ESP32 board as long as they have a ADC enabled pins)
- 1x 25V voltage tester/sensor (I have taken the photo from the Amazon listing, please don't sue me) - I bought them from Amazon here.
Pins
flowchart BT
subgraph ESP32
ESP32_GND[GND]
ESP32_GPIO36[GPIO36]
end
subgraph VoltageSensor["Voltage Sensor"]
VCC_S[S]-->ESP32_GPIO36
VCC_PLUS[+]
VCC_MINUS[-]-->ESP32_GND
VCC_GND[GND]
VCC_VCC[VCC]
end
subgraph DoorBell["Door Bell"]
DoorBell_PLUS[+]-->VCC_VCC
DoorBell_MINUS[-]-->VCC_GND
end
ESPHome Config
esphome:
name: my-door-bell
friendly_name: "My Door Bell"
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
level: WARN
# Enable Home Assistant API
api:
encryption:
key: "YOUR_HASSIO_API_ENCRYPTION_KEY"
ota:
- platform: esphome
password: "YOUR_OTA_PASSWORD"
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
binary_sensor:
- platform: template
name: "My Door Bell"
id: my_door_bell
icon: "mdi:doorbell"
# If you know a better device class for this use case, please let me know :-D
device_class: power
publish_initial_state: True
sensor:
- platform: adc
pin: GPIO36
name: "My Door Bell"
id: "my_door_bell_voltage"
update_interval: 0.15s
internal: true
attenuation: 12db
filters:
- multiply: 3.3
on_value_range:
above: 4.18
then:
if:
condition:
binary_sensor.is_off: my_door_bell
then:
- binary_sensor.template.publish:
id: my_door_bell
state: on
- delay: 6s
- binary_sensor.template.publish:
id: my_door_bell
state: off