Climate Mode Filtering Now Available

[Beormund]

Pull Request: #68

This update introduces flexible operation (cllimate) mode filtering and "smart memory" for power toggling. Whether you are using a simple on/off zone or a Heat Pump with Cooling capabilities, the component now adapts to your hardware.

✨ Key Features

• Mode Filtering: You can now choose exactly which modes appear in the Home Assistant UI using the supported_modes option.

• Mode Memory: If you turn the unit off, the component remembers if you were in Heat, Cool, or Dry mode. When you turn it back on, it restores that specific mode instead of defaulting to Heat.

• External Sync: Changes made via physical Samsung remotes or other NASA registers (0x4001) will now reflect accurately in the Home Assistant Climate card.

• Backwards Compatible: Existing configurations will continue to work as "Heat/Off" only by default.

Advanced users now have the ability to specify climate modes. This is done by specifying two additional fields. Firstly, you can explicitly link the climate component to the 0x4001 select component (operation/climate mode). The options available with 0x4001 are: "Heat", "Cool", "Auto", "Dry" and "Fan". Secondly, not all of these modes may be required so you can use the supported_modes field to show only the modes your specific indoor unit or zone uses (i.e., hiding the "Cool" mode).

climate:
  - platform: samsung_nasa
    name: "Zone 1"
    # The power switch (Register 0x4000)
    power_switch_id: nasa_power_switch     
    # NEW: The mode select (Register 0x4001)
    # Linking this allows ESPHome to force the mode when turning on
    mode_select_id: nasa_mode_select    
    # NEW: UI Filtering
    # Only these options will appear in Home Assistant
    supported_modes:                   
      - HEAT
      - COOL

Available options for supported_modes:

YAML Value	ESPHome Enum Constant	NASA Register (0x4001) Mapping
OFF	CLIMATE_MODE_OFF	Handled via Power Register (0x4000)
HEAT	CLIMATE_MODE_HEAT	Maps to the string "Heat"
COOL	CLIMATE_MODE_COOL	Maps to the string "Cool"
HEAT_COOL	CLIMATE_MODE_HEAT_COOL	Maps to the string "Auto"
DRY	CLIMATE_MODE_DRY	Maps to the string "Dry"
FAN_ONLY	CLIMATE_MODE_FAN_ONLY	Maps to the string "Fan"

Logic Flow

In this scenario the climate component now manages the relationship between the Power Switch and the Mode Select register to ensure they never get out of sync.

1. Commanding: When you select "Cool" in Home Assistant, the component first ensures the NASA Power register is ON, then sends the "Cool" command to the NASA Mode register.

2. Memory: If the unit is turned off via the NASA framework, the ESPHome component "bookmarks" the current mode.

3. Restore: On a "Power On" command, it re-issues the bookmarked mode to the 0x4001 register, ensuring the unit doesn't default to an unwanted state (like Fan Only).