diff --git a/src/camera_light_src_timing_controller/qt_serial_datachannel.cpp b/src/camera_light_src_timing_controller/qt_serial_datachannel.cpp
index d92c0fb..b5e86da 100644
--- a/src/camera_light_src_timing_controller/qt_serial_datachannel.cpp
+++ b/src/camera_light_src_timing_controller/qt_serial_datachannel.cpp
@@ -25,8 +25,10 @@ void QTDataChannel::init() {
           // ZLOGI(TAG, "rx %d bytes", rx_cnt);
           if (m_rxcb) m_rxcb(rx, rx_cnt);
         }
+        this_thread::sleep_for(chrono::microseconds(100));
+      } else {
+        this_thread::sleep_for(chrono::microseconds(10000));
       }
-      // this_thread::sleep_for(chrono::microseconds(1000));
     }
   }));
 }
@@ -137,8 +139,8 @@ int QTDataChannel::com_receive(uint8_t *rxbuf, int rxbufsize) {
   COMMTIMEOUTS TimeOuts;
   GetCommTimeouts(m_CommHandler, &TimeOuts);
   TimeOuts.ReadIntervalTimeout        = 0;  // 读间隔超时
-  TimeOuts.ReadTotalTimeoutMultiplier = 0;     // 读时间系数
-  TimeOuts.ReadTotalTimeoutConstant   = 1;    // 读时间常量
+  TimeOuts.ReadTotalTimeoutMultiplier = 0;  // 读时间系数
+  TimeOuts.ReadTotalTimeoutConstant   = 1;  // 读时间常量
   SetCommTimeouts(m_CommHandler, &TimeOuts);
 
   // PurgeComm(m_CommHandler, PURGE_RXCLEAR);