Ultrasonic Saltlevel sensor

salt_level_sensor.yaml

# Ultrasonic Saltlevel sensor
# Source: https://adonno.com/salt-level-sensor/

esphome:
  name: salt_level_sensor
  platform: ESP8266
  board: d1_mini

# WiFi connection, replace these with values for your WiFi.
wifi:
  ssid: DEINE_WLAN_SSID
  password: DEIN_WLAN_PASSWORT

# Enable logging
logger:

# Enable Home Assistant API
api:

# Enable over-the-air updates.
ota:

# Enable Web server.
web_server:
  port: 80
# Sync time with Home Assistant.
time:
  - platform: homeassistant
    id: homeassistant_time

# Text sensors with general information.
text_sensor:
  # Expose ESPHome version as sensor.
  - platform: version
    name: salt_level_sensor ESPHome Version
  # Expose WiFi information as sensors.
  - platform: wifi_info
    ip_address:
      name: salt_level_sensor IP
    ssid:
      name: salt_level_sensor SSID
    bssid:
      name: salt_level_sensor BSSID

# Exposed switches.
# Switch to restart the salt_level_sensor.   
switch:
  - platform: restart
    name: "salt_level_sensor Restart"

sensor:
  # Uptime sensor.
  - platform: uptime
    name: salt_level_sensor Uptime
    accuracy_decimals: 0

  # WiFi Signal sensor.
  - platform: wifi_signal
    name: salt_level_sensor WiFi Signal
    update_interval: 60s
    accuracy_decimals: 1

  - platform: ultrasonic
    trigger_pin: D1
    echo_pin: D2
    name: "Saltlevel in cm"
    update_interval: 60s
    unit_of_measurement: "cm"
    accuracy_decimals: 0
    filters:
    - multiply: 100
  
  - platform: ultrasonic
    trigger_pin: D1
    echo_pin: D2
    name: "Saltlevel in %"
    update_interval: 60s
    unit_of_measurement: "%"
    accuracy_decimals: 1
    filters:
    - lambda: return ((x-0.24)*100)/(0.88-0.24);