workbench-lamp-esphome.yaml

esphome:
  name: workbench_light
  
  on_boot:
    priority: -100
    # At priority: -100, pretty much everything should already be initialized.
    then:
      - script.execute: sync_from_buttons

esp32:
  board: esp32dev
  framework:
    type: arduino



output:
  # Output PWMs that actually controls the cold-white-warm-white LED panel
  - platform: ledc
    pin: GPIO26
    id: gpio26_led_white
    # frequency: 2000Hz
  - platform: ledc
    pin: GPIO18
    id: gpio18_led_yellow

light:

  - platform: cwww
    id: led_panel
    name: "Workbench Light"
    cold_white: gpio26_led_white
    warm_white: gpio18_led_yellow
    constant_brightness: true
    cold_white_color_temperature: 6536 K
    warm_white_color_temperature: 2000 K
    restore_mode: ALWAYS_OFF
    default_transition_length: 300ms
    
  - platform: status_led
    name: "Onboard status LED"
    pin: GPIO2
    internal: true
    
    
script:
  - id: sync_from_buttons
    # Synchronize light settings from the physical capacitive keys
    then:
    
      if:
        condition:
          # If the both pwm lanes are near zero, we treat this as an shutdown command
          lambda: 'return id(lamp_set_white_val).state < 4 && id(lamp_set_warm_val).state < 4;'
        then:
          - light.turn_off: led_panel
        else:
          - light.turn_on:
              id: led_panel
              cold_white: !lambda "return id(lamp_set_white_val).state / 100.0;"
              warm_white: !lambda "return id(lamp_set_warm_val).state / 100.0;"
              brightness: !lambda |-
                double pc = id(lamp_set_white_val).state / 100.0;
                double pw = id(lamp_set_warm_val).state / 100.0;
                double a=-0.03992806, b=1.2732741, c=1.2732741, d=-0.2732741, e=-0.2732741, f=-1;
                double x=pc, y=pw;
                
                // Use our polynomial surface fitting result
                double val = a + b*x + c*y + d*(x*x) + e*(y*y) + f*x*y;
                
                // Clamp to the range of 0-1
                val = val > 1 ? 1 : val;
                val = val < 0 ? 0 : val;
                
                return val;
    
  
sensor:
  # These are the two orignal brightness signals from the lamp MCU (via user interaction with the capacitive keys)
  - platform: duty_cycle
    pin: GPIO25
    id: lamp_set_white_val
    update_interval: 200ms
    internal: true
    filters:
      # Debounce the PWM readings
      delta: 3
    on_value:
      - script.execute: sync_from_buttons

  - platform: duty_cycle
    pin: GPIO32
    id: lamp_set_warm_val
    update_interval: 200ms
    internal: true
    filters:
      # Debounce the PWM readings
      delta: 3
    on_value:
      - script.execute: sync_from_buttons


# Enable logging
logger:
  logs:
    duty_cycle: INFO

# Enable Home Assistant API
api:
  encryption:
    key: "<example>"

ota:
  password: "b82e661079c5232980ce24b2275b26cf"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "WorkbenchLight Fallback Hotspot"
    password: "<example>"

captive_portal: