Quectel WCDMA UG FTP Series At Command Manual page 33

Write Command
AT+QFTPMDTM=<file_name>
Parameter
<file_name>
<modify_time>
<err>
<protocol_error>
WCDMA_UGxx_FTP_AT_Commands_Manual
OK
Response
OK
If successfully get the file modification time:
+QFTPMDTM: 0,<modify_time>
Else fail to get the file modification time:
+QFTPMDTM: <err>,<protocol_error>
or
+CME ERROR: <err>
String type, the file name in FTP server. The maximum size of the parameter is 50
bytes
String type, the file modification time on FTP server. The format is
"YYYYMMDDHHMMSS", or "YYYYMMDDHHMMSS.NNN"
Integer type, indicates the operation error code. It is the type of error (Please refer
to the Chapter 4)
Integer type, for reference only, indicates the original error code from FTP server
which is defined in FTP protocol (Please refer to Chapter 5). If it is 0, it is
meaningless
UMTS/HSPA Module Series
WCDMA UGxx FTP AT Commands Manual
Confidential / Released 32 / 44