Packaged firmware updates Error recovery
Digi XBee3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
237
After the final ACK is received, the cellular component firmware update is complete.
As a verification, enterMV (Modem Firmware Version)to reveal the version of the cellular component
firmware.
Note The AIstatus must be 0x23 or 0 forMVto give a valid response.
Error recovery
Several different types of errors can occur:
Corrupted firmware on the cellular component
If something goes wrong during a firmware update, (such as a loss of power), there is a good chance
that the firmware on the cellular component will be corrupted. This is indicated by an AI status of
0x24. If you see this status, reset the module (using FR for example) and then follow the steps in
Perform a cellular component firmware update to redo the cellular component firmware update.
Error
An error occurs when FW Update Response - 0xAB returns a non-zero status code. This can be caused
by a programming error on the host side (for example out of order sequence numbers), a software
error on the module side (for example too short of a timeout waiting for responses from the cellular
component), or an invalid image of the cellular component firmware. In any of these cases, the
firmware update is aborted such that it cannot be picked up from where it left off. The only reliable
recovery is to reset the module and then immediately Perform a cellular component firmware update.
Host initiated cancellation
If the host sets bit 2 of the flags byte in FW Update - 0x2B, the update in progress is aborted. Recovery
is then equivalent to the recovery for negative acknowledgments, described above.
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