LTE-LINK SE user's Guide
27
kernel upgrade,
upgrading device kernel system version.
rootfs upgrade,
upgrading device root file system version.
update fail,
this upgrade failed.
reboot to update,
reset the device to complete this upgrade.
When the screen interface status message displays "reboot to update", shown as Figure 5-21,
it means that the user can restart the link device to complete the version upgrade.
Figure 5- 21 Restart upgrade
5.9.2 Offline upgrade
Offline upgrade means that users can upgrade the system version of the hardware through
TF memory card. When the link device is powered on, it will check whether there is an upgrade
file of u-boot, kernel or rootfs in the root directory of the TF card, and upgrade the corresponding
file if it exists.
Notes
：
The file must be placed in the root directory of the TF card.
The file name must be named after u-boot/kernel/rootfs.
After the upgrade is finish, the link device will actively delete the corresponding
upgrade file in the TF memory card to avoid the situation that the user forgets to delete
the upgrade file in the card and causes the upgrade every time it starts, so if the user
needs to upgrade multiple times, please backup upgrade files on PC .
This operation has certain instability to the hardware system. If you need to use it for
offline upgrade, please operate under the guidance of relevant technical personnel.
