1. Summary Of Command Result <errcode>
| 0 | Success |
| 1 | SSL alert |
| 2 | Unknown error |
| 3 | Busy |
| 4 | Connection closed by server |
| 5 | Timeout |
| 6 | Transfer failed |
| 7 | File not exists or any other memory error |
| 8 | Invalid parameter |
| 9 | Operation rejected by server |
| 10 | Network error |
| 11 | State error |
| 12 | Failed to parse server name |
| 13 | Create socket error |
| 14 | Connect socket failed |
| 15 | Close socket failed |
| 16 | SSL session closed |
| 17 | File error, file not exist or other error. |
| 421 |
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. |
2. Summary Of Unsolicited Result Codes
| +CFTPSNOTIFY:PEER CLOSED |
When client disconnect passively, URC “+CFTPSNOTIFY: PEER CLOSED” will be reported, then user need to execute AT+CFTPSLOGOUT and login again. |
WiFi IoT Module
Bluetooth Module
5G/LTE/CAT-M1/NB-IoT
