We’re looking at using the EM7455 in tablets we supply to our customers. The existing modem does not work in all the regions we operate in and we already use the MC7455 in our embedded application and we like this modem. Getting the EM7455 to work in Windows 10, however, seems to be hit-and-miss: we have some units where it works as a drop-in replacement but others where we’re wrestling with the drivers or possibly modem firmware.
Looking at one modem in one tablet:
Some perhaps not-relevant system information:
Device Manager entries. Notice that there is a ‘QDLoader’ port but that it’s hidden:
The error message in the ‘General’ tab is ‘This device cannot start. (Code10)’
Based on this information and my understanding, this is a Lenovo version (VID 1199 PID 9079)
I attempted to update the firmware but I didn’t get too far:
To get this particular device working, do I need to be using a Lenovo driver? Or, should I be re-flashing the firmware somehow, in order so that the generic Sierra Wireless drivers work? As we deal with multiple, identical cloned tablets, getting the modem back to generic firmware is probably ideal, if possible. This way, the tablet image always matches the the firmware on the modem.
Is there something obvious I’m missing here, in getting this to work? I hope I’ve given enough information and context here.