esphome:
  name: hall-sat-thermostat
  friendly_name: Hall SAT Thermostat

esp32:
  board: esp32-c6-devkitc-1
  framework:
    type: esp-idf

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "xxxx"

ota:
  - platform: esphome
    password: "xxxx"

wifi:
  networks:
  - ssid: xxxx
    password: xxxx
  - ssid: xxxx
    password: xxxx
  

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Hall-Sat-Thermostat"
    password: "xxxx"

captive_portal:
# I2C bus configuration
i2c:
  sda: GPIO22
  scl: GPIO23
  scan: true
  frequency: 100kHz

substitutions:
  temp_offset: "-0.8"

# SHT35 sensor
sensor:
  - platform: sht3xd
    address: 0x44
    temperature:
      name: "Hall Temperature"
      accuracy_decimals: 2
      filters:
        - offset: ${temp_offset}
    humidity:
      name: "Hall Humidity"
      accuracy_decimals: 2
    heater_enabled: false
    update_interval: 30s



# =====================
# Sun sensor for dimming
# =====================

  - platform: homeassistant
    id: sun_elevation
    entity_id: sun.sun
    attribute: elevation
    internal: true

# =====================
# Globals
# =====================
globals:
  - id: blink_state
    type: bool
    restore_value: no
    initial_value: 'false'
  - id: flash_brightness
    type: float
    restore_value: no
    initial_value: '0.0'
  - id: flash_direction
    type: int
    restore_value: no
    initial_value: '1'
# =====================
# GPIO outputs (PWM for dimming)
# =====================
output:
  - platform: ledc
    id: gpio_output_a
    pin: GPIO00
    frequency: 1000Hz
  - platform: ledc
    id: gpio_output_h
    pin: GPIO01
    frequency: 1000Hz
  - platform: ledc
    id: gpio_output_c
    pin: GPIO02
    frequency: 1000Hz

# =====================
# HA switches
# =====================
switch:
  - platform: homeassistant
    id: ha_switch_state_a
    entity_id: switch.heating_away_true
  - platform: homeassistant
    id: ha_switch_state_h
    entity_id: switch.heating_home_true
  - platform: homeassistant
    id: ha_switch_state_c
    entity_id: switch.heating_comfort_true
  - platform: homeassistant
    id: ha_override
    entity_id: switch.heating_off_true
# =====================
# Text sensor for current thermostat mode
# =====================
text_sensor:
  - platform: homeassistant
    id: current_thermostat_mode
    entity_id: climate.hall
    attribute: preset_mode
# =====================
# Binary sensors
# =====================
binary_sensor:
  # Momentary push button to cycle thermostat mode
  - platform: gpio
    pin:
      number: GPIO17
      mode: INPUT_PULLUP
      inverted: true
    name: "Thermostat Mode Button"
    filters:
      - delayed_on: 50ms
    on_press:
      then:
        - homeassistant.service:
            service: climate.set_preset_mode
            data:
              entity_id: climate.hall
            data_template:
              preset_mode: >-
                {% set current = states.climate.hall.attributes.preset_mode %}
                {% if current == 'away' %}home
                {% elif current == 'home' %}comfort
                {% else %}away
                {% endif %}
  # Heating Off Override sensor
  - platform: homeassistant
    id: heating_off_override
    entity_id: switch.heating_off_true
# =====================
# Interval for flashing / controlling GPIOs
# =====================
interval:
  - interval: 50ms  # Faster interval for smooth fading
    then:
      - lambda: |-
          // Calculate brightness based on sun elevation
          // Full brightness above 0°, dims from 0° to -6° (civil twilight), min 10% below -6°
          float base_brightness = 1.0;
          if (!isnan(id(sun_elevation).state)) {
            float elevation = id(sun_elevation).state;
            if (elevation > 0) {
              base_brightness = 1.0;  // Full brightness during day
            } else if (elevation > -6) {
              // Fade from 100% at 0° to 10% at -6°
              base_brightness = 0.1 + (0.9 * (elevation + 6) / 6);
            } else {
              base_brightness = 0.1;  // Minimum 10% brightness at night
            }
          }
          
          // Determine if GPIO26 should flash
          bool flash_mode = (id(current_thermostat_mode).state == "none" ||
                             id(current_thermostat_mode).state == "activity" ||
                             id(current_thermostat_mode).state == "sleep") &&
                             !id(heating_off_override).state;
          
          // Soft flash: fade in and out smoothly
          if (flash_mode) {
            // Adjust flash brightness (0.0 to 1.0)
            float step = 0.05;  // Adjust this for faster/slower fade (0.05 = ~1 second cycle)
            id(flash_brightness) += step * id(flash_direction);
            
            // Reverse direction at limits
            if (id(flash_brightness) >= 1.0) {
              id(flash_brightness) = 1.0;
              id(flash_direction) = -1;
            } else if (id(flash_brightness) <= 0.0) {
              id(flash_brightness) = 0.0;
              id(flash_direction) = 1;
            }
          } else {
            id(flash_brightness) = 1.0;  // Full on for steady mode
          }
          
          // GPIO25 (output_a) steady control with dimming
          if (id(ha_switch_state_a).state && !id(heating_off_override).state)
            id(gpio_output_a).set_level(base_brightness);
          else
            id(gpio_output_a).set_level(0);
          
          // GPIO26 (output_h) flash / steady / off with dimming
          if (!id(heating_off_override).state) {
            if (flash_mode) {
              // Apply both base brightness (sun) and flash brightness (fade effect)
              id(gpio_output_h).set_level(base_brightness * id(flash_brightness));
            } else if (id(current_thermostat_mode).state == "home") {
              // Steady ON only for home
              id(gpio_output_h).set_level(base_brightness);
            } else {
              // OFF for away / comfort
              id(gpio_output_h).set_level(0);
            }
          } else {
            id(gpio_output_h).set_level(0);
          }
          
          // GPIO27 (output_c) steady control with dimming
          if (id(ha_switch_state_c).state && !id(heating_off_override).state)
            id(gpio_output_c).set_level(base_brightness);
          else
            id(gpio_output_c).set_level(0);