diff --git a/js/common/connection.js b/js/common/connection.js
index bf02a70..ca433f2 100644
--- a/js/common/connection.js
+++ b/js/common/connection.js
@@ -69,6 +69,11 @@ export function updateConnectionUi(connected, text) {
     }
   } catch (_) {}
   var label = text || (connected ? '已连接' : '未连接');
+  /* 判离线立刻清实时指标：只改灯不等于清数据，否则 APP/缓存下会
+   * 出现「离线 + 温度/电压仍显示」的假活状态。 */
+  if (!connected && typeof window.clearLiveMetricsOnDisconnect === 'function') {
+    try { window.clearLiveMetricsOnDisconnect(); } catch (_) {}
+  }
   // 仅顶栏连接胶囊（下方连接卡不再重复显示文案）
   var pc = getEl('pillConn');
   var pct = getEl('pillConnTxt');