diff --git a/src/ppclock/ota.py b/src/ppclock/ota.py
index 4cd138d..5592f10 100644
--- a/src/ppclock/ota.py
+++ b/src/ppclock/ota.py
@@ -6,9 +6,11 @@
 """
 from __future__ import annotations
 
-# GATT（自定义映射，与 Dialog 标准不同 —— 证据 z7_b0.java:665-679）
+# GATT（自定义映射，与 Dialog 标准不同 —— 证据 z7_b0.java:665-679；
+# SERV_STATUS 实机校正 2026-07-28：64b4e8b5 在本设备为 read-only，
+# 真 notify 通道为 h=38 的 5f78df94）
 SPOTA_SERVICE_UUID = "0000fef5-0000-1000-8000-00805f9b34fb"
-SPOTA_SERV_STATUS_UUID = "64b4e8b5-0de5-401b-a21d-acc8db3b913a"
+SPOTA_SERV_STATUS_UUID = "5f78df94-798c-46f5-990a-b3eb6a065c88"
 SPOTA_MEM_DEV_UUID = "8082caa8-41a6-4021-91c6-56f9b954cc34"
 SPOTA_GPIO_MAP_UUID = "724249f0-5ec3-4b5f-8804-42345af08651"
 SPOTA_PATCH_DATA_UUID = "457871e8-d516-4ca1-9116-57d0b17b9cb2"
diff --git a/tools/bridge_server.py b/tools/bridge_server.py
index af88a8f..89db042 100644
--- a/tools/bridge_server.py
+++ b/tools/bridge_server.py
@@ -27,7 +27,7 @@ import platform
 import sys
 
 PROTOCOL_VERSION = 1
-SERVER_BUILD = 4  # 2026-07-28: write 增加 alt(331f) 通道 + notify 三订阅
+SERVER_BUILD = 5  # 2026-07-28: SUOTA SERV_STATUS 实机校正为 5f78df94（h=38 notify）
 
 EPD_SERVICE_UUID = "13187b10-eba9-a3ba-044e-83d3217d9a38"
 EPD_CHAR_UUID = "4b646063-6264-f3a7-8941-e65356ea82fe"
@@ -39,7 +39,7 @@ ALT_NOTIFY_UUID = "0000331f-0000-1000-8000-00805f9b34fb"
 DEVICE_NAME_PREFIX = "NRF-"
 
 SPOTA_SERVICE_UUID = "0000fef5-0000-1000-8000-00805f9b34fb"
-SPOTA_SERV_STATUS_UUID = "64b4e8b5-0de5-401b-a21d-acc8db3b913a"
+SPOTA_SERV_STATUS_UUID = "5f78df94-798c-46f5-990a-b3eb6a065c88"  # 实机 h=38 notify（64b4e8b5 仅 read）
 SPOTA_MEM_DEV_UUID = "8082caa8-41a6-4021-91c6-56f9b954cc34"
 SPOTA_GPIO_MAP_UUID = "724249f0-5ec3-4b5f-8804-42345af08651"
 SPOTA_PATCH_DATA_UUID = "457871e8-d516-4ca1-9116-57d0b17b9cb2"