switch:
  - platform: gpio
    id: relay_fan
    name: "Relay G — Fan"
    pin:
      number: GPIO11   # repurposed from TF card MOSI — Phase 1 tradeoff, see build notes
      inverted: false   # set true if relay module is active-LOW
    restore_mode: ALWAYS_OFF
    icon: mdi:fan

  - platform: gpio
    id: relay_cool1
    name: "Relay Y1 — Cool Stage 1"
    pin:
      number: GPIO12   # repurposed from TF card SCK
      inverted: false
    restore_mode: ALWAYS_OFF
    icon: mdi:snowflake

  - platform: gpio
    id: relay_cool2
    name: "Relay Y2 — Cool Stage 2"
    pin:
      number: GPIO13   # repurposed from TF card MISO
      inverted: false
    restore_mode: ALWAYS_OFF
    icon: mdi:snowflake-variant

  - platform: gpio
    id: relay_heat1
    name: "Relay W1 — Heat Stage 1"
    pin:
      number: GPIO15   # repurposed from RS485 TXD
      inverted: false
    restore_mode: ALWAYS_OFF
    icon: mdi:fire

  - platform: gpio
    id: relay_heat2
    name: "Relay W2 — Heat Stage 2"
    pin:
      number: GPIO16   # repurposed from RS485 RXD
      inverted: false
    restore_mode: ALWAYS_OFF
    icon: mdi:fire-alert