add S300AI

Change-Id: Ice89434e8dc7b3be506380729d716f50aa75df14
diff --git a/lynq/S300AI/ap/app/at_tool/at_tool.h b/lynq/S300AI/ap/app/at_tool/at_tool.h
new file mode 100755
index 0000000..a781c51
--- /dev/null
+++ b/lynq/S300AI/ap/app/at_tool/at_tool.h
@@ -0,0 +1,7 @@
+#ifndef __AT_TOOL_H__

+#define __AT_TOOL_H__

+

+#include <stdio.h>

+#include "softap_api.h"

+

+#endif