Raspberry Pi cm4 dfrobot router board - openwrt 21.02 installation

README.md

Download release from https://downloads.openwrt.org/releases/21.02.0/targets/bcm27xx/bcm2711/openwrt-21.02.0-bcm27xx-bcm2711-rpi-4-ext4-factory.img.gz

gunzip openwrt-21.02.0-bcm27xx-bcm2711-rpi-4-ext4-factory.img.gz
dd if=openwrt-21.02.0-bcm27xx-bcm2711-rpi-4-ext4-factory.img of=/dev/SDCARD status=progress

mount rootfs to your pc

add network config to ../etc/config/network:

config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fdff:ac50:10da::/48'

config interface 'lan'
	option ifname 'eth1'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config interface 'wan'
	option proto 'dhcp'
	option ifname 'eth0'

add crontab for installation of kmod-r8169 and kmod-usb-dwc2 to .../etc/crontabs/root:

*/5 * * * * /bin/opkg update && /bin/opkg install kmod-r8169 && /bin/opkg install kmod-usb-dwc2 && /bin/rm -rf /etc/crontabs/root

boot rpi with lan cabel connected on wan (eth0) and wait.

After 5 min you should be able to connect to the webui on LAN port (http://192.168.1.1)

wifi was not working till i tried the fix proposed in this forum

https://forum.openwrt.org/t/raspberry-pi-cm4-wifi-not-working/90280/3