添加门未关超时告警功能，更新状态结构以支持门磁告警和开门时长

README.md

@@ -117,6 +117,8 @@
 | fire_danger | boolean | true/false | 火焰危险判定 |
 | human_present | boolean | true/false | 人体存在状态 |
 | door_closed | boolean | true/false | 门磁状态（true=关门） |
+| door_alarm | boolean | true/false | 门未关超时告警状态 |
+| door_open_seconds | number | s | 当前连续开门时长 |
 | fan_on | boolean | true/false | 风扇继电器状态 |
 | light_on | boolean | true/false | 照明继电器状态 |
 | cool_on | boolean | true/false | 制冷继电器状态 |
@@ -207,6 +209,7 @@
 - th_temp_l = 15.0
 - th_hum_h = 70.0
 - th_gas_h = 20.0
+- door_open_alarm_seconds = 60
 
 ### 7. 下发示例
 
@@ -239,3 +242,4 @@
 - 命令下发后，以上报主题 agri/env/data 的最新数据作为状态确认
 - 建议上位机做字段容错：新增字段应忽略，缺失字段使用默认显示
 - 当前固件未提供独立 ACK 主题，建议在上位机侧做超时重发策略
+- 门磁告警建议以 door_alarm 与 door_open_seconds 组合显示，door_alarm=true 时突出提示用户

main/main.cpp

@@ -59,6 +59,7 @@ static const gpio_num_t kDataPin = GPIO_NUM_14;
 #define HX711_STABLE_SAMPLES 15
 #define TWDT_NORMAL_TIMEOUT_MS 5000
 #define TWDT_UI_INIT_TIMEOUT_MS 120000
+#define DOOR_OPEN_ALARM_SECONDS 60
 
 typedef struct
 {
@@ -75,6 +76,8 @@ typedef struct
     bool fire_danger;
     bool human_present;
     bool door_closed;
+    bool door_alarm;
+    uint32_t door_open_seconds;
     bool fan_on;
     bool light_on;
     bool cool_on;
@@ -263,19 +266,53 @@ static void ui_init_task(void *arg)
 static void status_task(void *arg)
 {
     (void)arg;
+    TickType_t door_open_start_ticks = 0;
+    bool door_alarm_active = false;
+
     for (;;)
     {
         human_door_state_t io_state{};
         if (human_door_read(&io_state) == ESP_OK)
         {
             set_var_hum_status(io_state.human_present ? "有人" : "无人");
-            set_var_door_status(io_state.door_closed ? "关闭" : "开启");
+
+            uint32_t door_open_seconds = 0;
+            if (io_state.door_closed)
+            {
+                door_open_start_ticks = 0;
+                door_alarm_active = false;
+                set_var_door_status("关闭");
+            }
+            else
+            {
+                if (door_open_start_ticks == 0)
+                {
+                    door_open_start_ticks = xTaskGetTickCount();
+                }
+
+                door_open_seconds = (uint32_t)((xTaskGetTickCount() - door_open_start_ticks) * portTICK_PERIOD_MS / 1000U);
+                if (door_open_seconds >= DOOR_OPEN_ALARM_SECONDS)
+                {
+                    if (!door_alarm_active)
+                    {
+                        ESP_LOGW(TAG, "Door left open too long: %us", (unsigned)door_open_seconds);
+                    }
+                    door_alarm_active = true;
+                    set_var_door_status("未关告警");
+                }
+                else
+                {
+                    set_var_door_status("开启");
+                }
+            }
 
             if (s_env_data_lock)
             {
                 xSemaphoreTake(s_env_data_lock, portMAX_DELAY);
                 s_env_data.human_present = io_state.human_present;
                 s_env_data.door_closed = io_state.door_closed;
+                s_env_data.door_alarm = door_alarm_active;
+                s_env_data.door_open_seconds = door_open_seconds;
                 xSemaphoreGive(s_env_data_lock);
             }
         }
@@ -568,6 +605,8 @@ static void mqtt_publish_task(void *arg)
                     cJSON_AddBoolToObject(root, "fire_danger", local_data.fire_danger);
                     cJSON_AddBoolToObject(root, "human_present", local_data.human_present);
                     cJSON_AddBoolToObject(root, "door_closed", local_data.door_closed);
+                    cJSON_AddBoolToObject(root, "door_alarm", local_data.door_alarm);
+                    cJSON_AddNumberToObject(root, "door_open_seconds", local_data.door_open_seconds);
                     cJSON_AddBoolToObject(root, "fan_on", local_data.fan_on);
                     cJSON_AddBoolToObject(root, "light_on", local_data.light_on);
                     cJSON_AddBoolToObject(root, "cool_on", local_data.cool_on);
@@ -619,6 +658,8 @@ extern "C" void app_main(void)
     s_env_data.th_temp_l = 15.0f; // 低于 15度 制热
     s_env_data.th_hum_h  = 70.0f; // 湿度高于 70% 通风
     s_env_data.th_gas_h  = 20.0f; // 气体浓度高于 20% 通风
+    s_env_data.door_alarm = false;
+    s_env_data.door_open_seconds = 0;
 
     // 1. 初始化 Wi-Fi
     ESP_ERROR_CHECK(wifi_connect_init());