Add .env support for transport and sound device configuration

- Add python-dotenv support to control_server.py and sound.py
- Load TRANSPORT from environment variable (default: spi)
- Load AUDIO_INPUT_DEVICE from environment variable (default: 7)
- Load all port configurations from environment variables
- Update .env.example with comprehensive configuration options
- Create .env file with sensible defaults for Pi
- Transport, sound device, and network settings now configurable via .env

.env

@@ -0,0 +1,9 @@
+# Lighting Controller Configuration
+CONTROL_SERVER_URI=ws://localhost:8765
+CONTROL_SERVER_PORT=8765
+TRANSPORT=spi
+AUDIO_INPUT_DEVICE=7
+MIDI_TCP_HOST=127.0.0.1
+MIDI_TCP_PORT=65432
+SOUND_CONTROL_HOST=127.0.0.1
+SOUND_CONTROL_PORT=65433

.env.example

@@ -1,5 +1,8 @@
 # Lighting Controller Configuration
 
+# ==============================
+# WebSocket Configuration
+# ==============================
 # WebSocket URI for the control server
 # Used by UI client and test scripts to connect to the control server
 #
@@ -11,3 +14,27 @@ CONTROL_SERVER_URI=ws://10.42.0.1:8765
 #
 # For custom IP (if your Pi has a different address):
 # CONTROL_SERVER_URI=ws://YOUR_PI_IP:8765
+
+# Control server WebSocket port
+CONTROL_SERVER_PORT=8765
+
+# ==============================
+# Transport Configuration
+# ==============================
+# Transport method for LED communication
+# Options: spi, websocket
+TRANSPORT=spi
+
+# ==============================
+# Sound Detection Configuration
+# ==============================
+# Audio input device index (use sound.py to list available devices)
+AUDIO_INPUT_DEVICE=7
+
+# MIDI TCP configuration
+MIDI_TCP_HOST=127.0.0.1
+MIDI_TCP_PORT=65432
+
+# Sound control server configuration
+SOUND_CONTROL_HOST=127.0.0.1
+SOUND_CONTROL_PORT=65433

Pipfile

@@ -13,6 +13,7 @@ python-rtmidi = "*"
 pyaudio = "*"
 aubio = "*"
 websocket-client = "*"
+python-dotenv = "*"
 
 [dev-packages]
 

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "3f3ca9af45dd4382aac3c649ae11cefbe97059ad14f40172735213c4919baada"
+            "sha256": "db66b0f2b4e51e5a0bc2edc0d89af123c03928c72add32c16ba955eaefc34da7"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -162,6 +162,14 @@
             "index": "pypi",
             "version": "==0.2.14"
         },
+        "python-dotenv": {
+            "hashes": [
+                "sha256:31f23644fe2602f88ff55e1f5c79ba497e01224ee7737937930c448e4d0e24dc",
+                "sha256:a8a6399716257f45be6a007360200409fce5cda2661e3dec71d23dc15f6189ab"
+            ],
+            "index": "pypi",
+            "version": "==1.1.1"
+        },
         "python-rtmidi": {
             "hashes": [
                 "sha256:052c89933cae4fca354012d8ca7248f4f9e1e3f062471409d48415a7f7d7e59e",

src/control_server.py

@@ -13,17 +13,22 @@ import socket
 import threading
 import time
 import argparse
+import os
+from dotenv import load_dotenv
 from bar_config import LED_BAR_NAMES, DEFAULT_BAR_SETTINGS
 from color_utils import adjust_brightness
 from networking import SPIClient, WebSocketClient
 
+# Load environment variables from .env file
+load_dotenv()
+
 # Configure logging
 logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
 
 # Configuration
-CONTROL_SERVER_PORT = 8765
+CONTROL_SERVER_PORT = int(os.getenv("CONTROL_SERVER_PORT", "8765"))
-SOUND_CONTROL_HOST = "127.0.0.1"
+SOUND_CONTROL_HOST = os.getenv("SOUND_CONTROL_HOST", "127.0.0.1")
-SOUND_CONTROL_PORT = 65433
+SOUND_CONTROL_PORT = int(os.getenv("SOUND_CONTROL_PORT", "65433"))
 
 # Pattern name mapping for shorter JSON payloads
 PATTERN_NAMES = {
@@ -463,11 +468,12 @@ def parse_arguments():
     
     # Transport selection
     transport_group = parser.add_argument_group("Transport Options")
+    default_transport = os.getenv("TRANSPORT", "spi")
     transport_group.add_argument(
         "--transport", 
         choices=["spi", "websocket"], 
-        default="spi",
+        default=default_transport,
-        help="Transport method for LED communication (default: spi)"
+        help=f"Transport method for LED communication (default from .env or {default_transport})"
     )
     
     # Control options

src/sound.py

@@ -11,18 +11,23 @@ import time
 import logging # Added logging import
 import asyncio # Re-added asyncio import
 import threading # Added threading for control server
+import os
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+load_dotenv()
 
 # Configure logging
 DEBUG_MODE = True # Set to False for INFO level logging
 logging.basicConfig(level=logging.DEBUG if DEBUG_MODE else logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
 
 # TCP Server Configuration (assuming midi.py runs this)
-MIDI_TCP_HOST = "127.0.0.1"
+MIDI_TCP_HOST = os.getenv("MIDI_TCP_HOST", "127.0.0.1")
-MIDI_TCP_PORT = 65432
+MIDI_TCP_PORT = int(os.getenv("MIDI_TCP_PORT", "65432"))
 
 # Sound Control Server Configuration (for midi.py to control sound.py)
-SOUND_CONTROL_HOST = "127.0.0.1"
+SOUND_CONTROL_HOST = os.getenv("SOUND_CONTROL_HOST", "127.0.0.1")
-SOUND_CONTROL_PORT = 65433
+SOUND_CONTROL_PORT = int(os.getenv("SOUND_CONTROL_PORT", "65433"))
 
 class SoundBeatDetector:
     def __init__(self, tcp_host: str, tcp_port: int, *, input_device: int | None = None):
@@ -35,7 +40,8 @@ class SoundBeatDetector:
 
         self.bufferSize = 512
         self.windowSizeMultiple = 2
-        self.audioInputDeviceIndex = 7 if input_device is None else int(input_device)
+        default_device = int(os.getenv("AUDIO_INPUT_DEVICE", "7"))
+        self.audioInputDeviceIndex = default_device if input_device is None else int(input_device)
         self.audioInputChannels = 1
 
         self.pa = pyaudio.PyAudio()