fix：修复 MQTT 断线重连，修改报警阈值，减少误报

src/main.cpp

@@ -63,11 +63,15 @@ uint32_t g_breathNormalMs  = 0;      // 呼吸正常持续计时 (ms)
 uint32_t g_fallDetectMs     = 0;      // 跌倒检测计时 (ms)
 uint32_t g_fallClearMs      = 0;      // 跌倒清除计时 (ms)
 bool     g_fallDismissed     = false;  // 已手动解除, 不重复报警
+uint32_t g_vitalLostMs       = 0;      // 生命体征丢失持续计时 (ms)
+bool     g_vitalLostActive   = false;  // 生命体征丢失报警激活
+bool     g_vitalLostDismissed = false; // 生命体征丢失解除抑制
 #define ALARM_HYSTERESIS      3       // 连续3次确认才触发
 #define FALL_DETECT_MS        10000   // 跌倒持续10秒才触发 (房顶安装, 过滤坐下)
 #define FALL_CLEAR_MS         18000   // 跌倒消失18秒后才清除 (防误消)
 #define VITAL_DETECT_MS       20000   // 心率/呼吸持续异常20秒才触发
 #define VITAL_CLEAR_MS        15000   // 心率/呼吸持续正常15秒才恢复
+#define VITAL_LOST_MS         60000   // 在床但心率呼吸持续为0达60秒 → 疑似骤停
 
 // ============================================================
 // 时间同步
@@ -126,6 +130,8 @@ void handleAlarmCommand(const AlarmCommand& cmd) {
         g_fallDetectMs     = 0;
         g_fallClearMs      = 0;
         g_fallDismissed    = false;
+        g_vitalLostMs       = 0;
+        g_vitalLostActive   = false;
 
         // 解除抑制标志也复位 (远程恢复后重新武装)
         g_waterDismissed   = false;
@@ -133,6 +139,7 @@ void handleAlarmCommand(const AlarmCommand& cmd) {
         g_breathDismissed  = false;
         g_tempDismissed    = false;
         g_humiDismissed    = false;
+        g_vitalLostDismissed = false;
     } else {
         // 告警触发
         g_alarm.executeAlarm(cmd);
@@ -263,7 +270,8 @@ TelemetryData buildTelemetry(const RadarRawData& radar) {
     t.breathRate = radar.breathRate;
     t.body       = radar.body;
     t.sleepState = radar.sleepState;
-    t.sleepScore = radar.sleepScore;
+    // 清醒时不报睡眠评分 (雷达此时的值是残留/无意义), 避免误导
+    t.sleepScore = (radar.resident && radar.sleepState != 0) ? radar.sleepScore : 0;
     t.radarValid = radar.radarValid;
     t.vitalValid = radar.vitalValid;
 
@@ -425,6 +433,37 @@ void checkLocalAlarms(const RadarRawData& radar) {
     }
 #endif  // RADAR_TYPE != AFD1
 
+    // ─── ★★★★★ 人身安全: 生命体征丢失 (在床但心率呼吸持续为0 → 疑似骤停/死亡) ───
+    // 用 resident(在床) 而非 presence(有人): 人离房时 presence 有保持时间会误报,
+    // 而 resident 离床即清, 精准区分"人离开"和"人死在床上"。复用 心率+呼吸异常 类型。
+#if RADAR_TYPE != RADAR_TYPE_AFD1
+    if (enVital && millis() > 30000) {
+        bool vitalLost = radar.resident && radar.heartRate == 0 && radar.breathRate == 0;
+        if (vitalLost) {
+            if (!g_vitalLostActive && !g_vitalLostDismissed) {
+                if (g_vitalLostMs == 0) {
+                    g_vitalLostMs = millis();
+                } else if (millis() - g_vitalLostMs >= VITAL_LOST_MS) {
+                    g_vitalLostActive = true;
+                    g_vitalLostMs = 0;
+                    g_alarm.triggerLocal(AlarmManager::ALARM_HEART_ABNORMAL, "生命体征丢失(疑似骤停)");
+                    g_alarm.triggerLocal(AlarmManager::ALARM_BREATH_ABNORMAL, "生命体征丢失(疑似骤停)");
+                }
+            }
+        } else {
+            g_vitalLostMs = 0;
+            if (g_vitalLostActive) {
+                g_vitalLostActive = false;
+                g_alarm.clearLocal(AlarmManager::ALARM_HEART_ABNORMAL);
+                g_alarm.clearLocal(AlarmManager::ALARM_BREATH_ABNORMAL);
+            }
+            if (g_vitalLostDismissed) {
+                g_vitalLostDismissed = false;   // 体征恢复或离床后重新武装
+            }
+        }
+    }
+#endif  // RADAR_TYPE != AFD1
+
     // ─── ★★★ 环境安全: 水浸 (仅浴室) ───
     if (enWater) {
     bool waterLeak = !g_sensor.getRainDO() && g_sensor.isRainValid();
@@ -594,12 +633,15 @@ void setup() {
         g_radarTimeoutCnt       = 0;
         g_fallClearMs           = 0;
         g_fallDismissed         = true;   // 抑制重复报警, 等跌倒信号消了再恢复
+        g_vitalLostMs           = 0;
+        g_vitalLostActive       = false;
         // 其余类型同样抑制, 条件恢复正常后才重新武装
         g_waterDismissed        = true;
         g_heartDismissed        = true;
         g_breathDismissed       = true;
         g_tempDismissed         = true;
         g_humiDismissed         = true;
+        g_vitalLostDismissed    = true;
     });
     g_buttons.onProvisionLongPress([]() {
         g_wifi.startConfigPortal();

src/mqtt_manager.cpp

@@ -145,6 +145,16 @@ bool MQTTManager::isConnected() {
 // ============================================================
 
 void MQTTManager::loop() {
+    // 连接实际已断开 (网络抖动/broker重启/心跳超时), 复位标志触发重连
+    // 否则 _connected 永远为 true, 下面 else 分支只调 _mqtt.loop() 却不重连,
+    // 设备会卡在"WiFi通/MQTT死"的僵尸状态 (小程序显示离线)
+    if (_connected && !_mqtt.connected()) {
+        Serial.println("[MQTT] ⚠️ 连接断开, 触发重连...");
+        _connected = false;
+        _reconnectInterval = MQTT_RECONNECT_MIN;
+        _lastReconnectAttempt = 0;
+    }
+
     if (!_connected) {
         uint32_t now = millis();
         if (now - _lastReconnectAttempt >= _reconnectInterval) {