SARA-R42 - Application note
UBX-20050829 - R02
Restore factory configuration
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C1-Public
14
Restore factory configuration
During operation with the module, different files may be stored in the module’s file system. Similarly,
the NVM is populated with user configuration as well as auxiliary information stored by the module to
optimize its operations (e.g. information on the cellular environment).
☞
Profiles can be restored with
ATZ
command.
☞
AT commands factory-programmed values stored in NVM and profiles are listed in appendix B.2
of SARA-R4 series AT commands manual
The host application can restore the module factory configuration via the
+UFACTORY
AT command
(see the SARA-R4 series AT commands manual
); this can be required to recover from an
unexpected behavior and restart the module in a controlled configuration, or during the MNO
certifications, where the device is tested in various simulated scenarios and the auxiliary information
or previous user settings can affect the tests outcome.
Restoring the factory configuration of the module is a 2-step process:
1.
Set the type of restore to perform, using the
+UFACTORY
AT command. FS and/or NVM can be
restored.
2.
Reboot the module.
The
+UFACTORY
AT command writes a flag in NVM and does not perform any restoring action. This
flag is then read
at the next reboot,
when the +UFACTORY corresponding action is executed.
Therefore it is possible to cancel the +UFACTORY action by issuing the
AT+UFACTORY=0,0
command
before the reboot
.
shows some examples.
Command
Response
Description
Delete all user files previously saved with USER flag in the file system
AT+UFACTORY=1,0
OK
Set +UFACTORY to delete all user files
previously stored with USER flag in the
file system. No restore is performed so
far.
AT+UFACTORY?
+UFACTORY: 1,0
OK
Check the restore action currently set.
AT+CFUN=16
OK
Reboot the module. At next reboot, the
restore action previously set is applied.
Delete all modem profiles in NVM
AT+UFACTORY=0,1
OK
Set +UFACTORY to delete all modem
profiles, in detail native modem profiles
are reset, while added modem profiles are
deleted. No restore is performed so far.
AT+UFACTORY?
+UFACTORY: 0,1
OK
Check the restore action currently set.
AT+CFUN=16
OK
Reboot the module. At next reboot,
modem profiles are reverted to the
factory programmed values.
Restore UART and UPSV settings to default in NVM
AT+UFACTORY=0,2
OK
Set +UFACTORY to restore UART and
+UPSV settings to default in NVM. No
restore is performed so far.
AT+UFACTORY?
+UFACTORY: 0,2
OK
Check the restore action currently set.
