Of course I'm on openwrt snapshot...
I just get "OK" answer. Check the log, i've tried also restarting and do it as soon as ssh was available. I don't have "microcom" (not installable too), i've "picocom".
I start is in this way: picocom /dev/ttyUSB3
then
Terminal ready
ati
Quectel
EG18
Revision: EG18EAPAR01A08M4G
OK
AT+QFLST="*"
OK
AT+QFOTADL="https://quec-pro-oss.oss-cn-shanghai.aliyuncs.com/fota/9000/Update_EG18EAPAR01A08V05M4G-R01A13M4G_01.200.01.200_V02.zip"
OK
+QIND: "FOTA","HTTPSTART"
+QIND: "FOTA","HTTPEND",701
AT+QFOTADL="/cache/ufs/DFOATUpgrade.zip"
ERROR
EDIT (solved):
The trick was to stop interface wwan0 on openwrt and then I've issued this command using picocom /dev/ttyUSB3:
AT+QFOTADL="https://quec-pro-oss.oss-cn-shanghai.aliyuncs.com/fota/9000/Update_EG18EAPAR01A08V05M4G-R01A13M4G_01.200.01.200_V02.zip"
then reconnection with picocom /dev/ttyUSB3 to see update progress.