OK
4 Summary of FTP Error Code
FTP error code:.
<errorcode>
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
421
SIM7500_SIM7600_SIM7800 Series_FTPS_AT Command Manual
Meaning
Success
SSL alert
Unknown error
Busy
Connection closed by server
Timeout
Transfer failed
File not exists or any other memory error
Invalid parameter
Operation rejected by server
Network error
State error
Failed to parse server name
Create socket error
Connect socket failed
Close socket failed
SSL session closed
File error, file not exist or other error.
Server response connection time out, while received error code
421, you need do AT+CFTPSLOGOUT to logout server then
AT+CFTPSLOGIN again for further operations.
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