we are trying to update the firmware of an EM7305 modem and running into lots of problems. Have tried various methods but none seems to work.
On Windows 7 the driver can not be installed and subsequently the FW updater can not find the modem at all.
On Windows 10 the driver can be installed, the updater finds the modem, but will hang later, waiting for a download port.
Also I have tried several of the linux updaters, on an x86_64 system (kernel 4.14.48) and on an arm system (Raspberry, tried with kernels 4.9.50 and 4.14.49), without any success. Without going into much detail, the result was sometimes an error message “No modem connected” or “modem not in correct state”, but in most cases the firmware downloader just hangs when it’s about to start the download.
Is there a combination of operating system and firmware updater version that is known to work?
Under Linux, which driver (modules) need to be present, which ones should be blocked?
Does the modem have to be in a particular configuration or state before starting the fw update process?