Water Softener ESPHome Config

water-softener_ESPHome_config.yml

esphome:
  name: water-softener

esp32:
  board: esp32dev
  framework:
    type: arduino

globals:
  # distance between bottom of tank and sensor position is 0.91m
  - id: sensor_height
    type: float
    initial_value: '0.91'

  # distance between salt max fill line and sensor position is 0.16m
  - id: distance_offset
    type: float
    initial_value: '0.16'

  # distance between bottom of tank and max fill line is 0.75m
  - id: max_fill_height
    type: float
    initial_value: '0.75'

sensor:
  - platform: ultrasonic
    id: "salt_level_distance"
    trigger_pin: GPIO17
    echo_pin: GPIO18
    name: "Salt Level Distance"
    update_interval: 10s
    unit_of_measurement: "m"
  
  - platform: copy
    source_id: "salt_level_distance"
    name: "Salt Level Distance From Max Fill Line"
    filters:
    # Calculates distance, in centimeters, of the difference between the max fill lineheight of the salt and the current level
    - lambda: return (x - id(distance_offset)) * 100;
    unit_of_measurement: "cm"

  - platform: copy
    source_id: "salt_level_distance"
    name: "Remaining Salt Level"
    filters:
    # Calculates height, in centimeters, of salt pellets remaining in the tank
    - lambda: return (id(sensor_height) - x) * 100;
    unit_of_measurement: "cm"

  - platform: copy
    source_id: "salt_level_distance"
    name: "% Remaining Salt Level"
    filters:
    # Calculates % of salt pellets remaining in the tank
    - lambda: return (id(sensor_height) - x) * (100/id(max_fill_height));
    unit_of_measurement: "%"

#boilerplate ESPHome/HA stuff removed
    

water-softner_HA_dashboard.yml

square: false
columns: 1
type: grid
cards:
  - type: gauge
    entity: sensor.remaining_salt_level_2
    name: Water Softener Salt Level
    needle: true
    severity:
      green: 35
      yellow: 17
      red: 0
  - square: false
    columns: 2
    type: grid
    cards:
      - type: tile
        entity: sensor.salt_level_distance_from_max_fill_line
        name: Salt Used
      - type: tile
        entity: sensor.remaining_salt_level
        name: Salt Remaining