absolutely no warranty!
install *.bin by one of the following,
ethernet port is configured as LAN by default. Wi-Fi is not enabled.
install factory.bin from Web UI on stock firmware.
put initramfs image as "linux.trx-recovery" into tftp server (serverip is 192.168.11.2), then press & hold AOSS button while power on.
TBD
nvram set bootpartition=0
install factory.bin from Web UI on stock firmware.
ethernet port is configured as LAN by default. Wi-Fi is not enabled.
you may flash uImage to "Kernel" partition by mtd_write command on stock firmware, or you may load uImage by TFTP on bootloader.
telnetd is running on stock firmware (at least on ver. 1.0.2 and 1.0.5). if you want to access it from ethernet port, IPv6 can be used. (no rule for ip6tables!)
you can use SD card, USB storage, and several commands such as mtd_write, tftp, etc on telnet.
please refer official manual about default username and password.
if you press and hold RESET button on bottom side while power on, or choose "6: Boot recover system code via Flash." on console, recover system will be booted. (udhcpd and telnetd without authentication is running)
you can extract uImage (e.g. v_1.0.5.bin) from stock firmware image (e.g. WRH-300CRxx_v1.0.5.bin) by tar command.
install factory.bin from Web UI on stock firmware
for tftp, prepare bhr4grv2-kernel.bin and bhr4grv2-rootfs-squashfs.bin. default serverip is 192.168.12.10. to update, enter "run uk" and "run uf" on U-Boot console.
JP2 is UART pins, 3.3V, TX, RX, and GND. (from left to right)
long thin Torx T8 is recommended.