[feature]SZZT AT Service

Change-Id: I4094f2a42b9827b5f6a6332b3d67f54a55bd8618
diff --git a/src/lynq/lib/liblynq-fota/MD5/md5_encode.c b/src/lynq/lib/liblynq-fota/MD5/md5_encode.c
index 10ccab7..429bc40 100644
--- a/src/lynq/lib/liblynq-fota/MD5/md5_encode.c
+++ b/src/lynq/lib/liblynq-fota/MD5/md5_encode.c
@@ -43,7 +43,7 @@
 	mtk_device_wrap_close(handle);
 }
 
-#define MD5_READ_BUFFER_LEN 2*1024
+#define MD5_READ_BUFFER_LEN 4*1024
 int lynq_md5_file_verfy(char* filePath, char* file_md5)
 {
 	int ret = -1;