substitutions:
  device_name: salt-sensor
  friendly_name: "Salt Level Sensor"
  
esphome:
  name: ${device_name}
  friendly_name: ${friendly_name}

esp32:
  board: esp32-c3-devkitm-1
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "EaifDkFuB9N+qDKHW6B4k/n495FWLVmcp6DBODKzK10="

ota:
  - platform: esphome
    password: "7ce613915c51252c2810c07c889b4a5e"

wifi:
  ssid: !secret wifi_iot_ssid
  password: !secret wifi_password
  
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Salt-Sensor Fallback Hotspot"
    password: "ZoBRDcj54rwW"
  
  # Prevents aggressive reconnection attempts
  power_save_mode: none  # Use 'light' for battery devices
  
  # Slower but more reliable connection
  fast_connect: true
  
  # Handle connection failures gracefully
  on_connect:
    - logger.log: "Wi-Fi connected!"
  on_disconnect:
    - logger.log: "Wi-Fi disconnected!"

# Reduce mDNS traffic
mdns:
  disabled: false  # Set to true if you use static IPs and don't need discovery

# Watchdog to auto-reboot if things go wrong
interval:
  - interval: 5min
    then:
      - if:
          condition:
            and:
              - lambda: 'return millis() > 300000;'  # >5 min uptime
              - not:
                  wifi.connected:
          then:
            - logger.log: "Wi-Fi not connected for 5 min, rebooting..."
            - delay: 10s
            - lambda: 'App.safe_reboot();'

captive_portal:

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

  # WiFi Signal sensor.
  - platform: wifi_signal
    name: salt_level_sensor WiFi Signal
    update_interval: 60s
  
  # Diagnostic sensors
  - platform: wifi_signal
    name: "${device_name} WiFi Signal"
    update_interval: 60s
    
  - platform: uptime
    name: "${device_name} Uptime"
    update_interval: 60s
    
# Ultrasonic sensor to measure salt level.
  # - platform: ultrasonic
  #   trigger_pin: GPIO6
  #   echo_pin: GPIO7
  #   name: "Salt level in percent"
  #   update_interval: 1h
  #   unit_of_measurement: "%"
  #   # pulse_time: 20us
  #   # accuracy_decimals: 4
  #   filters:
  #       - lambda: return(0.42-x)*(100/0.42);
  #       # - multiply: 100
        # - exponential_moving_average:
        #     alpha: 0.001
        #     send_every: 1
        # - clamp:
        #     min_value: 20
        #     max_value: 100
    # on_value_range:
    #     above: 200
    #     then:
    #         - homeassistant.service:
    #             service: notify.mailgun
    #             data:
    #                 target:
    #                     -"joshua@cnjmail.com"
    #                 title: "Add Salt"
    #                 message: "Add Salt to the Water Softener Tank"
    #         - homeassistant.service:
    #             service: notify.mobile_app_joshuas_iphone_of_pain
    #             data:
    #               message: Water softener is low on salt, please add salt.

  # Ultrasonic sensor to measure salt level.
  - platform: ultrasonic
    trigger_pin: GPIO6
    echo_pin: GPIO7
    name: "Salt level in cm"
    update_interval: .5h
    unit_of_measurement: "cm"
    # pulse_time: 20us
    # accuracy_decimals: 4
    filters:
        - lambda: return(0.83-x)*(100/0.83);