• Connect to power using included DC adaptor
• Solder RX, TX, and GND to on-board GPIO
• Get in fallback mode by holding down WPS while attaching power
• Press F to confirm

• Fix network interface
• Connect computer to LAN1

• Run SSH on computer

https://openwrt.org/docs/guide-user/installation/generic.backup#create_full_mtd_backup_from_openwrt

• https://openwrt.org/toh/samknows/sk-wb8