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NOTE:  Wouter Cloetens from LGI shared links and information on taking serial connection and flashing OpenWRT image


PREREQUISITE: Following flashing instructions works well with U-Boot 2015.10-rc2 bootloader version. If bootloader version found to be U-Boot SPL 2019.07  in your Turris Omnia, then please follow steps in Bootloader Downgrade section below in this page.

Flashing

The Omnia ships with TurrisOS preinstalled. This is an OpenWrt fork with the older Linux 4.4 kernel. It uses btrfs to manage the eMMC flash.

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=> env set mmcboot run openwrt_mmcload \|\| run factory_mmcload\; bootz 0x01000000 - 0x02000000
=> saveenv
=> reset


Bootloader Downgrade:

(Following steps are derived from https://wiki.debian.org/InstallingDebianOn/TurrisOmnia#Bootloader_update)

View file
nameuboot-turris-omnia-spl.kwb
height250

Install a tftp server (eg. tftpd-hpa) on your computer and place the attached uboot-turris-omnia-spl.kwb file into your computer's tftp directory(eg. /srv/tftp/) and run the following commands at the u-boot prompt on Turris Omnia.


Code Block
dhcp
tftpboot 0x1000000 uboot-turris-omnia-spl.kwb
sf probe
sf update 0x1000000 0 $filesize