How to write firmware to the EG915U-EU via FOTA?

IoT Modules LTE Standard Module
1

I have the version installed on my modem (flashed via USB) EG915UEUABR02A04M08_01.001.01.001

If I am reinstalling a version (first step) EG915UEUABR02A04M08_01.001.01.001-EG915UEUABR02A10M08_01.001.01.001.pack via FOTA

I get a message that the firmware is installed +QIND: “FOTA”, “HTTPEND”,0

But the modem doesn’t respond, no COM ports are displayed, and I have to reflash via USB to get the modem working again.

If try to write the version EG915UEUABR02A10M08_01.001.01.001-EG915UEUABR03A01M08_01.203.01.203.pack,

then after downloading the firmware I get an error +QIND: “FOTA”,“HTTPEND”,510

How to write firmware to the EG915U-EU via FOTA?

2

Hi @Oleh_Cherkes ，
1）After receiving+QIND: “FOTA”, “HTTPEND”, 0, the upgrade process takes about 3 minutes. During these 3 minutes, the USB is in a closed state and the upgrade process cannot be seen. After the upgrade is completed, the module will automatically restart.You can also use UART serial port for upgrading, so that you can see the upgrade process.
2) The error about +QIND: “FOTA”,“HTTPEND”,510: Firstly, you need to ensure that the current firmware version of the module is EG915UEUABR02A04M08_01.001.01.001. And then try to write the version EG915UEUABR02A10M08_01.001.01.001-EG915UEUABR03A01M08_01.203.01.203.pack.