I work at a company developing systems which utilizes the Digi Connect ME 9210 for Ethernet comunications.
Several times now, when trying to upgrade the firmware of the module integrated on our custom boards, the Digi module has died, making it unable to upgrade further or use at all.
To upgrade these modules, I've used the http server template created by Digi. Again, sometimes it works, sometimes it doesnt.
Is there a safer way to upgrade this? Any tips on making it more reliable? Am I missing something? Does it make a difference if I upgrade the rom.bin first?
Also, in one instance, I uploaded a working backup.bin to the module. However, when upgrading the image.bin, the module died, and won't even launch the backup image (it simply just freezes).
Worth pointing out is that, twice now, I managed to upload the firmware, reboot the device, go ahead and change the device's network settings (via the http server), whereupon it dies on me and doesn't launch again.
One more thing, I change the flash memory mapping in these firmware upgrades. But that shouldn't cause the program to die because it's not dependent on anything in the flash memory to run.