Packaged firmware updates About packaged firmware updates
Digi XBee3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
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About packaged firmware updates
An XBee Smart Modem contains two processors: a microcontroller that controls most operations of
the module, and a cellular component. Both processors contain firmware that you can update. For any
given release of the microcontroller firmware (after this referred to as the module firmware), there is
an associated release of the cellular component firmware. One or more releases of the module
firmware is associated with a given cellular component firmware. However, for a given module
firmware, there is only one associated release of the cellular component firmware. The following table
depicts an example of this with arbitrary release numbers:
Module firmware Cellular component firmware
Release 1 Release A
Release 2 Release A
Release 3 Release B
Release 4 Release C
Release 5 Release C
Release 6 Release C
Release 7 Release D
Note The module version number keeps incrementing whether or not the cellular component
firmware version increases.
Module firmware update
A module firmware update is the process of updating the firmware on the microcontroller.
Cellular component firmware update
A cellular component firmware update is the process of updating the firmware on the cellular
component.
Packaged firmware update
A packaged firmware update is the process of updating the firmware on the module and on the
cellular component if and only if it is needed. The primary reason for not always updating the cellular
component firmware is that it takes 15-20 minutes to complete. A host program that performs
packaged firmware updates over the XBee Smart Modem's serial interface is required to know of the
association between module firmware and cellular component firmware as shown in About packaged
firmware updates.
In addition to knowing which cellular component firmware is required for a given release of the
module firmware, the host program needs to know which firmware versions for the module support a
cellular component firmware update. For example, if Release 3 is the first version of the module
firmware that supports cellular component firmware updates, you must update it before updating the
cellular component firmware. But to downgrade from Release 3 or greater to Release 2 or less, you
must downgrade the cellular component firmwarebeforedowngrading the module firmware.
Otherwise, the older firmware would not be able to downgrade the cellular component firmware.
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