diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
index e05eab6..ced43c8 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c
@@ -777,7 +777,8 @@ static void json_sensor_callback(const uint8_t *pkg, uint16_t len)
                 "\"code\":0,\"msg\":\"success\",\"data\":%s}\n",
                 (unsigned long)mstick(), data_json);
             uint32_t slen = strlen(out);
-            WCHNET_SocketSend(g_json_socket_listen, (uint8_t *)out, &slen);
+            // WCHNET TCP: listen socket=N, data socket=N+1
+            WCHNET_SocketSend(g_json_socket_listen + 1, (uint8_t *)out, &slen);
             free(out);
         }
     }
@@ -1191,7 +1192,8 @@ void tcp_json_push_sensor(void) {
                 "\"code\":0,\"msg\":\"success\",\"data\":%s}\n",
                 (unsigned long)mstick(), data_json);
             uint32_t slen = strlen(out);
-            WCHNET_SocketSend(g_json_socket_listen, (uint8_t *)out, &slen);
+            // WCHNET TCP: listen socket=N, data socket=N+1
+            WCHNET_SocketSend(g_json_socket_listen + 1, (uint8_t *)out, &slen);
             free(out);
         }
     }