diff --git a/src/rom/app.py b/src/rom/app.py
index 69620f2..eaabb67 100644
--- a/src/rom/app.py
+++ b/src/rom/app.py
@@ -55,10 +55,13 @@ def get_weather_data(city=None, force=False):
         if city is None:
             city = config.get("city", "北京")
 
+        # 获取本地时间戳
+        ts0 = int(time.mktime(time.localtime()))
+
         # 从配置获取API基础URL，默认使用官方API
         api_base = config.get("weather_api_url", "https://iot.foresh.com/api/weather")
-        url = f"{api_base}?city={city}"
-        print(f"正在获取{city}天气数据...")
+        url = f"{api_base}?city={city}&ts={ts0}"
+        print(f"正在获取{city}天气数据，时间戳:{ts0}...")
 
         # 发送GET请求
         response = urequests.get(url)
@@ -69,6 +72,17 @@ def get_weather_data(city=None, force=False):
             wdata = response.json()
             response.close()  # 关闭连接释放内存
 
+            # 如果服务器返回了时间戳，则同步本地时间
+            if "ts" in wdata and isinstance(wdata["ts"], (int, float)):
+                server_ts = int(wdata["ts"])
+                ts1 = int(time.mktime(time.localtime()))
+                # 检查时间戳差异，如果差异过大才同步
+                if abs(server_ts - ts1) > 30:  # >30s
+                    machine.RTC.datetime(time.localtime(server_ts + (ts1 - ts0) // 2))
+                    print(
+                        f"时间已同步: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())}"
+                    )
+
             # 提取关键信息，减少内存占用
             weather_report = {
                 "t": wdata.get("temperature", "N/A"),
@@ -82,6 +96,7 @@ def get_weather_data(city=None, force=False):
                 "date": wdata.get("date", "N/A"),
                 "advice": wdata.get("advice", "N/A"),
                 "image": wdata.get("image", "N/A"),
+                "ts": ts,  # 添加时间戳用于同步本地时间
             }
 
             print("天气数据获取成功")
@@ -104,7 +119,7 @@ async def weather_update_task():
     """定时更新天气数据的后台任务"""
 
     # 获取更新间隔，默认10分钟
-    interval_minutes = config.get("weather_interval", 10)
+    interval_minutes = int(config.get("weather_interval", 10))
     interval_ms = interval_minutes * 60 * 1000  # 转换为毫秒
 
     print(f"开始定时更新天气数据，间隔{interval_minutes}分钟")
@@ -175,6 +190,7 @@ async def animation_task():
 def start():
     # 初始化液晶屏
     display.init_display()
+    display.brightness(int(config.get("brightness", 10)))
     display.show_jpg("/rom/www/images/T1.jpg", 80, 80)
     gc.collect()
 
@@ -255,6 +271,8 @@ def start():
     async def lcd_set(request):
         ack = {"status": "success"}
         try:
+            if request.method != "POST":
+                raise Exception("invalid request")
             content_length = int(request.headers["Content-Length"])
             post_data = (await request.read(content_length)).decode()
 
@@ -284,6 +302,8 @@ def start():
     async def config_update(request):
         ack = {"status": "success"}
         try:
+            if request.method != "POST":
+                raise Exception("invalid request")
             content_length = int(request.headers["Content-Length"])
             post_data = (await request.read(content_length)).decode()
 
diff --git a/src/rom/config.py b/src/rom/config.py
index f0a397c..a3af15f 100644
--- a/src/rom/config.py
+++ b/src/rom/config.py
@@ -15,16 +15,13 @@ class Config:
             cls._instance = super(Config, cls).__new__(cls)
         return cls._instance
 
-    def __init__(
-        self, ssid=None, password=None, city=None, weather_interval=10, **kwargs
-    ):
+    def __init__(self, ssid=None, password=None, city=None, **kwargs):
         """初始化配置，只在第一次调用时执行"""
         if not self._initialized:
             self.config_data = {
                 "ssid": ssid,
                 "password": password,
                 "city": city,
-                "weather_interval": weather_interval,
             }
             # 添加其他可能的自定义配置项
             self.config_data.update(kwargs)
@@ -82,8 +79,7 @@ class Config:
         self.config_data = {
             "ssid": None,
             "password": None,
-            "city": None,
-            "weather_interval": 10,
+            "city": "北京",
         }
 
     def is_valid(self):
diff --git a/src/rom/display.py b/src/rom/display.py
index 97322ee..136d355 100644
--- a/src/rom/display.py
+++ b/src/rom/display.py
@@ -27,7 +27,7 @@ class Display:
         if not self._initialized:
             self.tft = None
             self._backlight = None
-            self._brightness = 50  # 默认亮度50%
+            self._brightness = 80  # 默认亮度80%
             self._initialized = True
 
     def init_display(self):
@@ -82,7 +82,7 @@ class Display:
         """设置背光亮度 (0-100)"""
         if _brightness >= 0 and _brightness <= 100:
             # 将0-100范围映射到0-1023 (PWM占空比)
-            duty = int(1023 * _brightness / 100)
+            duty = int(1023 * (100 - _brightness) / 100)
             self._backlight.duty(duty)
             self._brightness = _brightness
         return self._brightness