substitutions:
  name: "athom-co2-sensor"
  friendly_name: "Athom C02 Sensor"
  # Allows ESP device to be automatically lined to an 'Area' in Home Assistant. Typically used for areas such as 'Lounge Room', 'Kitchen' etc
  room: ""
  device_description: "athom scd40 CO₂ sensor"
  project_name: "China Athom Technology.CO₂ Sensor"
  project_version: "1.0.10"
  update_interval: 5s
  # Define a domain for this device to use. i.e. iot.home.lan (so device will appear as athom-smart-plug-v2.iot.home.lan in DNS/DHCP logs)
  dns_domain: ".local"
  # Set timezone of the smart plug. Useful if the plug is in a location different to the HA server. Can be entered in unix Country/Area format (i.e. "Australia/Sydney")
  timezone: ""
  # Set the duration between the sntp service polling ntp.org servers for an update
  sntp_update_interval: 6h
  # Network time servers for your region, enter from lowest to highest priority. To use local servers update as per zones or countries at: https://www.ntppool.org/zone/@
  sntp_server_1: "0.pool.ntp.org"
  sntp_server_2: "1.pool.ntp.org"
  sntp_server_3: "2.pool.ntp.org"  
  # Enables faster network connections, with last connected SSID being connected to and no full scan for SSID being undertaken
  wifi_fast_connect: "false"
  # Define logging level: NONE, ERROR, WARN, INFO, DEBUG (Default), VERBOSE, VERY_VERBOSE
  log_level: "DEBUG"
  # Enable or disable the use of IPv6 networking on the device
  ipv6_enable: "false"

#############################ESP32C3###########################
  sht40_sda_pin: GPIO10
  sht40_scl_pin: GPIO8
  button_pin:    GPIO9
  led_pin:       GPIO21
#############################ESP32C3###########################

esphome:
  name: "${name}"
  friendly_name: "${friendly_name}"
  comment: "${device_description}"
  area: "${room}"
  name_add_mac_suffix: true
  min_version: 2026.6.0
  project:
    name: "${project_name}"
    version: "${project_version}"
  platformio_options:
    board_build.flash_mode: dio
  on_boot:
    priority: 800
    then:
      - if:
          condition:
            wifi.connected:
          then:
            - light.turn_off: led
          else:
            - script.execute: wifi_rgb_loop

esp32:
  board: esp32-c3-devkitm-1
  flash_size: 4MB
  variant: ESP32C3
  framework:
    type: esp-idf
    version: recommended
    sdkconfig_options:
      # @grigi found in testing that these options resulted in better responsiveness.
      # BLE 4.2 is supported by ALL ESP32 boards that have bluetooth, the original and derivatives.
      CONFIG_BT_BLE_42_FEATURES_SUPPORTED: y
      # Also enable this on any derivative boards (S2, C3 etc) but not the original ESP32.
      CONFIG_BT_BLE_50_FEATURES_SUPPORTED: y
      # Extend the watchdog timeout, so the device reboots if the device appears locked up for over 10 seconds.
      CONFIG_ESP_TASK_WDT_TIMEOUT_S: "10"

api:
  # reboot_timeout: 0s
  # Only enable BLE tracking when wifi is up and api is connected
  # Gives single-core ESP32-C3 devices time to manage wifi and authenticate with api
  on_client_connected:
     - esp32_ble_tracker.start_scan:
        continuous: true
  # Disable BLE tracking when there are no api connections live
  on_client_disconnected:
    if:
      condition:
        not:
          api.connected:
      then:
        - esp32_ble_tracker.stop_scan:

ota:
  - platform: esphome
    id: ota_esphome
  # Enables OTA firmware flashing from a URL (used by the update component below)
  - platform: http_request
    id: ota_http_request

# Required by the ota http_request platform and the update component.
# verify_ssl: false skips TLS cert validation to reduce heap/RAM pressure during
# the download; the manifest's MD5 still verifies firmware integrity before flashing.
http_request:
  id: http_request_component
  verify_ssl: false

update:
  # Managed updates via HTTP request: periodically checks the published manifest
  # and exposes a "Firmware Update" entity, pointing at this device's GitHub Pages
  # manifest. Pages URLs avoid the redirect/buffer issues of Release download URLs.
  - platform: http_request
    id: update_http_request
    name: "Firmware Update"
    source: https://athom-tech.github.io/esp32-configs/firmware/athom-scd40-sensor.manifest.json
    # update_interval defaults to 6h (how often it checks, not installs)

logger:
  baud_rate: 0  # 0 Enables logging, but disables serial-port logging to free CPU and memory
  level: ${log_level}

mdns:
  disabled: false

web_server:
  port: 80

network:
  enable_ipv6: ${ipv6_enable}

wifi:
  ap: {}
  fast_connect: "${wifi_fast_connect}"
  domain: "${dns_domain}"

captive_portal:

esp32_improv:
  authorizer: none

esp32_ble_tracker:
  scan_parameters:
    # Don't auto start BLE scanning, we control it in the `api` block's automation.
    continuous: false
    active: true  # send scan-request packets to gather more info, like device name for some devices.
    interval: 320ms  # default 320ms - how long to spend on each advert channel
    window:   300ms  # default 30ms - how long to actually "listen" in each interval. Reduce this if device is unstable.
    # If the device cannot keep up or becomes unstable, reduce the "window" setting. This may be
    # required if your device is controlling other sensors or doing PWM for lights etc.

bluetooth_proxy:
  active: true

dashboard_import:
  package_import_url: github://athom-tech/esp32-configs/athom-scd40-sensor.yaml

i2c:
  sda: "$sht40_sda_pin"
  scl: "$sht40_scl_pin"
  scan: true
  id: bus_a

# Example configuration entry
sensor:
  - platform: scd4x
    id: scd40_sensor
    update_interval: ${update_interval}
    co2:
      name: "CO2"
      id: "co2"
      on_value:
        - script.execute:
            id: update_aqi
        - if:
            condition:
              switch.is_on: status_light
            then:
              - script.execute: update_light
    temperature:
      name: "Temperature"
      id: "temperature"
      disabled_by_default: true
    humidity:
      name: "Humidity"
      id: "humidity"
      disabled_by_default: true

  - platform: uptime
    name: "Uptime Sensor"
    id: uptime_sensor
    type:
      timestamp
    entity_category: "diagnostic"

  - platform: wifi_signal
    name: "WiFi Signal dB"
    id: wifi_signal_db
    update_interval: 60s
    entity_category: "diagnostic"

  - platform: copy
    source_id: wifi_signal_db
    name: "WiFi Signal Percent"
    filters:
      - lambda: return min(max(2 * (x + 100.0), 0.0), 100.0);
    unit_of_measurement: "Signal %"
    entity_category: "diagnostic"
    device_class: ""

binary_sensor:
  - platform: status
    name: "Status"
    entity_category: diagnostic

  - platform: gpio
    pin:
      number: "$button_pin"
      mode: INPUT_PULLUP
      inverted: true
    name: "Power Button"
    disabled_by_default: true
    on_multi_click:
      - timing:
        - ON for at least 4s
        then:
          - button.press: Reset
button:
  - platform: restart
    name: "Restart"
    entity_category: config

  - platform: factory_reset
    name: "Factory Reset"
    id: Reset
    entity_category: config

  - platform: safe_mode
    name: "Safe Mode"
    internal: false
    entity_category: config

light:
  - platform: esp32_rmt_led_strip
    rgb_order: GRB
    pin: "$led_pin"
    num_leds: 1
    chipset: ws2812
    restore_mode: RESTORE_DEFAULT_OFF
    name: "Light"
    id: "led"

switch:
  - platform: template
    name: "Status Light"
    id: status_light
    entity_category: config
    optimistic: true
    restore_mode: RESTORE_DEFAULT_OFF
    on_turn_on:
      - light.turn_on: led
    on_turn_off:
      - light.turn_off: led

text_sensor:
  - platform: wifi_info
    ip_address:
      name: "IP Address"
      id: ip_address
      entity_category: diagnostic
    ssid:
      name: "Connected SSID"
      id: ssid
      entity_category: diagnostic
    mac_address:
      name: "Mac Address"
      id: mac_address
      entity_category: diagnostic

  - platform: template
    name: "Last Restart"
    id: device_last_restart
    icon: mdi:clock
    entity_category: diagnostic
    device_class: timestamp

  - platform: template
    name: "Air Quality Index"
    id: aqi
    icon: mdi:air-filter

time:
  - platform: sntp
    id: sntp_time
  # Define the timezone of the device
    timezone: "${timezone}"
  # Change sync interval from default 5min to 6 hours (or as set in substitutions)
    update_interval: ${sntp_update_interval}
  # Set specific sntp servers to use
    servers:
      - "${sntp_server_1}"
      - "${sntp_server_2}"
      - "${sntp_server_3}"
  # Publish the time the device was last restarted
    on_time_sync:
      then:
        # Update last restart time, but only once.
        - if:
            condition:
              lambda: 'return id(device_last_restart).state == "";'
            then:
              - text_sensor.template.publish:
                  id: device_last_restart
                  state: !lambda 'return id(sntp_time).now().strftime("%a %d %b %Y - %I:%M:%S %p");'

script:
  - id: wifi_rgb_loop
    mode: restart
    then:
      - logger.log: "Wi-Fi disconnected. RGB loop started"
      - while:
          condition:
            not:
              wifi.connected:
          then:
            - light.turn_on:
                id: led
                red: 100%
                green: 0%
                blue: 0%
                brightness: 100%
            - delay: 1s

            - light.turn_on:
                id: led
                red: 0%
                green: 100%
                blue: 0%
                brightness: 100%
            - delay: 1s

            - light.turn_on:
                id: led
                red: 0%
                green: 0%
                blue: 100%
                brightness: 100%
            - delay: 1s

            - light.turn_off: led
            - delay: 100ms

  - id: update_aqi
    mode: restart
    then:
      - if:
          condition:
              sensor.in_range:
               id: co2
               above: 1500
          then:
            - text_sensor.template.publish:
                id: aqi
                state: Bad
          else:
            - if:
                condition:
                    sensor.in_range:
                      id: co2
                      above: 800
                      below: 1500
                then:
                  - text_sensor.template.publish:
                      id: aqi
                      state: Acceptable
                else:
                  - text_sensor.template.publish:
                      id: aqi
                      state: Good
  - id: update_light
    mode: restart
    then:
      - if:
          condition:
            text_sensor.state:
              id: aqi
              state: Bad
          then:
            - light.turn_on:
                id: led
                brightness: 100%
                red: 100%
                green: 0%
                blue: 0%
          else:
            - if:
                condition:
                  text_sensor.state:
                    id: aqi
                    state: Acceptable
                then:
                  - light.turn_on:
                      id: led
                      brightness: 50%
                      red: 100%
                      green: 100%
                      blue: 0%
                else:
                  - light.turn_on:
                      id: led
                      brightness: 50%
                      red: 0%
                      green: 100%
                      blue: 0%