Add global brightness support to driver

Handle per-device global brightness via ESPNow messages and apply it alongside per-preset brightness in all patterns.

src/main.py

@@ -28,9 +28,16 @@ while True:
     if e.any():
         host, msg = e.recv()
         data = json.loads(msg)
-        if data["v"] != "1":
+        # Only handle messages with the expected version.
+        if data.get("v") != "1":
             continue
         print(data)
+        # Global brightness (0–255) for this device
+        if "b" in data:
+            try:
+                patterns.b = max(0, min(255, int(data["b"])))
+            except (TypeError, ValueError):
+                pass
         if "presets" in data:
             for name, preset_data in data["presets"].items():
                 # Convert hex color strings to RGB tuples and reorder based on device color order
@@ -44,4 +51,3 @@ while True:
                 preset_name = select_list[0]
                 step = select_list[1] if len(select_list) > 1 else None
                 patterns.select(preset_name, step=step)
-

src/patterns.py

@@ -52,7 +52,8 @@ class Patterns:
         self.n = NeoPixel(Pin(pin, Pin.OUT), num_leds)
         self.num_leds = num_leds
         self.step = 0
-       
+        # Global brightness (0–255), controlled via ESPNow {"b": <value>}
+        self.b = 255
 
         self.generator = None
         self.presets = {}
@@ -122,7 +123,10 @@ class Patterns:
         self.num_leds = num_leds
 
     def apply_brightness(self, color, brightness_override=None):
-        effective_brightness = brightness_override if brightness_override is not None else self.brightness
+        # Combine per-preset brightness (override) with global brightness self.b
+        local = brightness_override if brightness_override is not None else 255
+        # Scale preset brightness by global brightness
+        effective_brightness = int(local * self.b / 255)
         return tuple(int(c * effective_brightness / 255) for c in color)
 
     def fill(self, color=None):
@@ -444,7 +448,7 @@ class Patterns:
         
         phase = "growing"  # "growing", "shrinking", or "off"
         
-        colors = preset.colors
+        colors = preset.c
         color = self.apply_brightness(colors[0] if colors else (255, 255, 255), preset.b)
         
         while True: