Update config.py

Added a new ButtonConfig dataclass:

enabled: bool = False

pin: int = 17 (BCM pin for the button)

long_press_seconds: float = 1.0

Extended the main Config dataclass with a button: ButtonConfig field.

Updated load_config_from_json() to construct button_config from the "button" section in config.json.

This allows enabling/disabling the button, changing the GPIO pin, and tuning the long-press threshold (and optional poll interval) without code changes.

linux_voice_assistant/config.py

@@ -5,6 +5,9 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Dict, List, Optional
 
+import logging
+_LOGGER = logging.getLogger(__name__)
+
 # -----------------------------------------------------------------------------
 # Configuration Dataclasses
 # -----------------------------------------------------------------------------
@@ -16,6 +19,7 @@ class AudioConfig:
     input_block_size: int = 1024
     output_device: Optional[str] = None
 
+
 @dataclass
 class WakeWordConfig:
     """Settings for wake word detection."""
@@ -25,12 +29,14 @@ class WakeWordConfig:
     refractory_seconds: float = 2.0
     download_dir: str = "local"
 
+
 @dataclass
 class ESPHomeConfig:
     """Settings for the ESPHome API server."""
     host: str = "0.0.0.0"
     port: int = 6053
 
+
 @dataclass
 class LedConfig:
     """Settings for the LED strip."""
@@ -38,7 +44,8 @@ class LedConfig:
     interface: str = "spi"
     clock_pin: int = 13
     data_pin: int = 12
-    num_leds: int = 3  # Note: This will be overridden by 'preferences.json' if it exists
+    num_leds: int = 3  # Note: overridden by 'preferences.json' if it exists
+
 
 @dataclass
 class MqttConfig:
@@ -49,6 +56,17 @@ class MqttConfig:
     username: Optional[str] = None
     password: Optional[str] = None
 
+
+@dataclass
+class ButtonConfig:
+    """Settings for a hardware momentary button (e.g. ReSpeaker 2-Mic HAT)."""
+    enabled: bool = False
+    # BCM GPIO pin number for the button input.
+    pin: int = 17
+    # Press duration (in seconds) to be considered a "long press".
+    long_press_seconds: float = 1.0
+
+
 @dataclass
 class AppConfig:
     """General application settings."""
@@ -58,6 +76,7 @@ class AppConfig:
     preferences_file: str = "preferences.json"
     debug: bool = False
 
+
 @dataclass
 class Config:
     """Main configuration object."""
@@ -67,6 +86,7 @@ class Config:
     esphome: ESPHomeConfig = field(default_factory=ESPHomeConfig)
     led: LedConfig = field(default_factory=LedConfig)
     mqtt: MqttConfig = field(default_factory=MqttConfig)
+    button: ButtonConfig = field(default_factory=ButtonConfig)
 
 # -----------------------------------------------------------------------------
 # Helper Function
@@ -74,7 +94,7 @@ class Config:
 
 def load_config_from_json(config_path: Path) -> Config:
     """Loads configuration from a JSON file and populates dataclasses."""
-    
+
     # --- Step 1: Load raw JSON data ---
     try:
         with open(config_path, "r", encoding="utf-8") as f:
@@ -88,15 +108,18 @@ def load_config_from_json(config_path: Path) -> Config:
 
     # --- Step 2: Create config objects from raw data ---
     if "app" not in raw_data:
-        raise ValueError("Configuration file must contain an 'app' section with a 'name'.")
-    
+        raise ValueError(
+            "Configuration file must contain an 'app' section with a 'name'."
+        )
+
     app_config = AppConfig(**raw_data.get("app", {}))
     audio_config = AudioConfig(**raw_data.get("audio", {}))
     wake_word_config = WakeWordConfig(**raw_data.get("wake_word", {}))
     esphome_config = ESPHomeConfig(**raw_data.get("esphome", {}))
     led_config = LedConfig(**raw_data.get("led", {}))
     mqtt_config = MqttConfig(**raw_data.get("mqtt", {}))
-    
+    button_config = ButtonConfig(**raw_data.get("button", {}))
+
     # --- Step 3: Set MQTT 'enabled' flag ---
     if mqtt_config.host:
         mqtt_config.enabled = True
@@ -109,7 +132,5 @@ def load_config_from_json(config_path: Path) -> Config:
         esphome=esphome_config,
         led=led_config,
         mqtt=mqtt_config,
+        button=button_config,
     )
-
-import logging
-_LOGGER = logging.getLogger(__name__)