diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/loop_uart_proto.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/loop_uart_proto.c
index 49d16de..21a1f42 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/loop_uart_proto.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/loop_uart_proto.c
@@ -661,6 +661,7 @@ static lup_sensor_cb_t g_lup_sensor_cb = NULL;
 void lup_set_sensor_callback(lup_sensor_cb_t cb)
 {
     g_lup_sensor_cb = cb;
+    PRINT("LUP: sensor callback %s\n", cb ? "registered" : "cleared");
 }
 
 /*
@@ -697,6 +698,8 @@ void lup_process_frame(const uint8_t *pkg, uint16_t len)
     if (cmd == LUP_CMD_SENSOR_REPORT) {
         if (g_lup_sensor_cb) {
             g_lup_sensor_cb(pkg, len);
+        } else {
+            PRINT("LUP: 0xC0 received but no callback registered!\n");
         }
         return;
     }
diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
index 4b22278..3704bc2 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
@@ -787,6 +787,10 @@ static void json_sensor_callback(const uint8_t *pkg, uint16_t len)
 void tcp_json_srv_init(void) {
     uint8_t ret;
     SOCK_INF sock_inf;
+    static uint8_t _init_done = 0;
+
+    if (_init_done) return;  // 防止 net_srv_init 反复调用
+    _init_done = 1;
 
     memset(&sock_inf, 0, sizeof(SOCK_INF));
     sock_inf.SourPort = TCP_JSON_PORT;