Persist global brightness settings.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main.py

@@ -1,6 +1,7 @@
 from settings import Settings
 from machine import WDT
 from espnow import ESPNow
+import utime
 import network
 from presets import Presets
 from utils import convert_and_reorder_colors
@@ -11,6 +12,7 @@ print(settings)
 
 presets = Presets(settings["led_pin"], settings["num_leds"])
 presets.load()
+presets.b = settings.get("brightness", 255)
 startup_preset = settings.get("startup_preset")
 if startup_preset:
     presets.select(startup_preset)
@@ -18,6 +20,7 @@ if startup_preset:
 
 wdt = WDT(timeout=10000)
 wdt.feed()
+last_brightness_save = 0
 
 sta_if = network.WLAN(network.STA_IF)
 sta_if.active(True)
@@ -41,6 +44,11 @@ while True:
         if "b" in data:
             try:
                 presets.b = max(0, min(255, int(data["b"])))
+                settings["brightness"] = presets.b
+                now = utime.ticks_ms()
+                if utime.ticks_diff(now, last_brightness_save) >= 500:
+                    settings.save()
+                    last_brightness_save = now
             except (TypeError, ValueError):
                 pass
         if "presets" in data:

src/settings.py

@@ -20,6 +20,7 @@ class Settings(dict):
        
         self["debug"] = False
         self["startup_preset"] = None
+        self["brightness"] = 255
 
     def save(self):
         try: