water-purifier-sensors.yaml

esphome:
  name: water-purifier-sensors
  friendly_name: Water Purifier Sensors
# This is where the custom component is included.
  includes:
    - tof_vl53l1x.h
# Also, it requires these libraries to be loaded.
  libraries:
    - Wire
    - "pololu/VL53L1X@1.3.1"
  on_boot:
    priority: -10
    then:
    - wait_until:
        api.connected:
    - logger.log: API is connected!
    - rtttl.play: "success:d=24,o=5,b=100:c,g,b"
    - switch.turn_on: buzzer_enabled
  project:
    name: Broeks.Purifier_Sensors
    version: "1.0"
  platform: ESP8266
  board: d1_mini

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "qZtVspOTTnmEjVYqYAU9jacQRJo60r8PRIXLh7ilxis="

ota:
  password: "b88935f0f38e0515c6a2806219064e80"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

# Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Water-Purifier-Sensors"
    password: "tNnNxJmV8BoU"

captive_portal:

# i2c bus is used by the TOF sensor. Frequency is a custom setting.
i2c:
  sda: 4
  scl: 5
  scan: True
  frequency: 400kHz

# Define the buzzer output
output:
- platform: esp8266_pwm
  pin: D7
  id: buzzer

# Define buzzer as output for RTTTL
rtttl:
  output: buzzer

# Configure LED
light:
- platform: neopixelbus
  variant: WS2812
  pin: D8
  num_leds: 1
  flash_transition_length: 500ms
  type: GRB
  id: activity_led
  name: "LED"
  restore_mode: ALWAYS_OFF

# Define switches to control LED and buzzer from HA
switch:
- platform: template
  name: "Buzzer Enabled"
  id: buzzer_enabled
  icon: mdi:volume-high
  optimistic: true
  restore_mode: "RESTORE_DEFAULT_ON"
  entity_category: config

# My standard button to restart the device
button:
  - platform: restart
    name: "Restart"

sensor:
# I also always add the wifi details as a standard sensor
  - platform: wifi_signal
    name: "WiFi signal"
    id: wifi_strength
    icon: mdi:wifi-arrow-up-down
    update_interval: 60s
    entity_category: diagnostic
# This is for the (custom) TOF sensor I used. I added some offset to counter for the distance between the top of the 
# salt level and the lid.
  - platform: custom
    lambda: |-
      auto my_sensor = new MyCustomSensor();
      App.register_component(my_sensor);
      return {my_sensor};
    sensors:
      name: "Distance"
      accuracy_decimals: 0
      unit_of_measurement: "mm"        
      state_class: "measurement"
      device_class: "distance"
      filters:
        - offset: -30

# Again, my OCD-like mandatory sensors
text_sensor:
  - platform: version
    hide_timestamp: false
    name: "ESPHome Version"
    entity_category: diagnostic
  - platform: wifi_info
    ip_address:
      name: "IP Address"
      icon: mdi:wifi
      entity_category: diagnostic
    ssid:
      name: "Connected SSID"
      icon: mdi:wifi-strength-2
      entity_category: diagnostic