diff --git a/app/src/main/java/com/shuwei/dish/match/scale/ScaleDataAggregator.kt b/app/src/main/java/com/shuwei/dish/match/scale/ScaleDataAggregator.kt
index c091e8b..e5791f7 100644
--- a/app/src/main/java/com/shuwei/dish/match/scale/ScaleDataAggregator.kt
+++ b/app/src/main/java/com/shuwei/dish/match/scale/ScaleDataAggregator.kt
@@ -34,11 +34,29 @@ class ScaleDataAggregator(private val localDeviceId: String) {
 
     /**
      * 设置指定设备的 IP 地址
+     * 若缓存中已有该设备的数据且 ip 为空，立即回填并触发 StateFlow 更新，
+     * 解决早期数据包在 IP 到达前入缓存导致一直显示"未知"的问题
      * @param deviceId 设备 ID
      * @param ip       IP 地址字符串
      */
     fun setDeviceIp(deviceId: String, ip: String) {
+        if (ip.isEmpty()) return
         deviceIpMap[deviceId] = ip
+        // 回填该设备所有 ip 为空的缓存条目
+        val keys = cache.keys.filter { it.startsWith("$deviceId#") }
+        if (keys.isEmpty()) return
+        var updated = false
+        keys.forEach { key ->
+            val old = cache[key] ?: return@forEach
+            if (old.ip.isEmpty()) {
+                cache[key] = old.copy(ip = ip)
+                updated = true
+            }
+        }
+        if (updated) {
+            _allScales.value = HashMap(cache)
+            Log.d(TAG, "已回填设备IP: $deviceId -> $ip, 共 ${keys.size} 条")
+        }
     }
 
     /**