Looking for general guidance on upgrading from Barrier Breaker to the latest OpenWrt on my ALFA 1200R. I was able to get Barrier Breaker on the router with a custom image from this guide: https://oldwiki.archive.openwrt.org/toh/alfa.network/ac1200r
According to the compatibility matrix the router should support 19.07.2. The only instructions from the guide are:
(do it under U-Boot, using UART and TFTP server): Select option "2: Load system code then write to Flash via TFTP" and use "sysupgrade" image.
I've gotten so far as connecting to the router through the UART interface. I can do a sysupgrade -F to the 19.07.2 image but this doesn't boot and leads me to a prompt from the UART MINICOM terminal where I go through the steps again to install the custom 14.07 image
I think I am close. I can send the initramfs bin to the device with TFTP, just not sure how to get it to boot. The custom 14.07 image boots immediately after TFTP transfer without any further interaction with the prompt