diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index 1e4227e..9801f90 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -292,7 +292,7 @@ int hg_scanner_300::discard_all_images(void)
 }
 int hg_scanner_300::start(void)
 {
-	//if (is_read_int)
+	//if (is_read_int)   
 	//{
 	//	VLOG_MINI_1(LOG_LEVEL_WARNING, "device  status is(%s)\n", STATU_DESC_SCANNER_ERR_DEVICE_DEVS_BOOTING);
 	//	return SCANNER_ERR_DEVICE_DEVS_BOOTING;
@@ -304,6 +304,7 @@ int hg_scanner_300::start(void)
 		{
 			break;
 		}
+		std::this_thread::sleep_for(std::chrono::milliseconds(1000));
 		VLOG_MINI_1(LOG_LEVEL_WARNING, "device  status is(%s)\n", STATU_DESC_SCANNER_ERR_DEVICE_DEVS_BOOTING);
 	}
 	//discard_all_images();