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ASUS RT-AC58U v2

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AC1300 Dual Band WiFi Gigabit Router.
Support for this device is Work In Progress!

Links
wikidevi (source of some info on the page) https://wikidevi.wi-cat.ru/ASUS_RT-AC58U_v2
GPL Source Code (select “Others” in “select OS” drop-down) https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-WiFi-Routers/RT-AC58U-V2/HelpDesk_Download/

Common information

This section describes information that is shared across the series of related devices.

Common Links
Forum thread https://forum.openwrt.org/t/adding-openwrt-support-for-asus-rt-ac57u-v2/53281
WIP PR for qcn5502 (802.11n at 2.4GHz) Wi-Fi https://github.com/openwrt/openwrt/pull/9389
FCC https://fcc.io/MSQ/-RTACRH01
Similar or identical devices series
Common specifications
SoC Qualcomm QCN5502 WiSoC
CPU MIPS 74Kc (v5.0) @775MHz
WLAN1 Qualcomm Atheros QCN5502 (bgn)
WLAN2 Qualcomm Atheros QCA9888 (an+ac, 2T2R, 5GHz)
RAM 128 MiB (Winbond W971GG6SB-25)
USB one USB 2.0 port
Switch Qualcomm Atheros QCA8337
Ethernet speed 1000Mbps
LAN ports 4
WAN ports 1

Serial: there are 4 connection points in the upper right corner of the board.

Left to right: power, ground, TX, RX. Check the labels near the holes. Baud-rate is 115200.

The router has 9 LEDs:

  • Power
  • Port4
  • Port3
  • Port2
  • Port1
  • Wan
  • 2.4Ghz WiFi
  • 5 Ghz WiFi
  • USB

Stock firmware

ssh access can be enabled on the router web admin page at this menu point: Administration → System → Service. You have full root access.

Default settings
SSID 2.4GHz ASUS
SSID 5GHz ASUS_5G
IP address 192.168.50.1
User admin
Password admin

Installing OpenWrt

NOTE! There is no official support at this point. The following link leads to an unofficial, personal repository where the development is taking place.

You can download the WIP source code and community images at https://gitlab.com/alexconst.sh/openwrt.

  1. Building from source: branch apjet01-802.11n is probably what you want as it is the only one with qcn5502 support
  2. Using unofficial images (NO WARRANTY! BACK UP YOUR FLASH!)
    1. make sure your stock flash layout matches the table under the “Flash Layout” section below on this page (rootfs doesn't matter as long as it's contained inside “linux”)
    2. checkout the apjet01-releases/v1 tag and look inside asus-apjet01-releases directory
    3. select the file depending on the name (and version!) of your device
    4. *squashfs-factory.bin is what you want for full initial install

In recovery mode, the bootloader will start a tftp server and wait for you to send the image.

  1. Connect router's LAN port to your computer
  2. Set static IP of computer to 192.168.1.10/24
  3. Make sure the router is turned off
  4. Hold the reset button
  5. Turn the router on and keep holding the button a few seconds until you see the power LED blinking slowly
  6. Use a tftp client to send the image file to IP 192.168.1.1 at port 69 (example with atftp: atftp --put -l /path/to/image 192.168.1.1 69)
  7. If there are no errors from tftp client, bootloader is installing OpenWrt; wait 2-3 minutes
  8. Remove static IP from your computer's network interface, switch back to DHCP

Another updated custom build, with package management working: https://github.com/looi/openwrt/releases/tag/qcn550x-tag

Flash Layout

partition start end Name
mtd0 0x000000000000 0x000000040000 Bootloader
mtd1 0x000000040000 0x000000050000 nvram
mtd2 0x000000050000 0x000000060000 Factory
mtd3 0x000000060000 0x000000f80000 linux
mtd4 0x0000001ecb00 0x000000f80000 rootfs
mtd5 0x000000f80000 0x000001000000 jffs2
mtd6 0x000000000000 0x000001000000 ALL

You can backup a partition like this:

  • Login via ssh, telnet or serial console
  • Use dd command to backup (Danger, wrong usage can overwrite rom): dd if=/dev/mtd6 of=all.img
  • Use scp to download the image
 

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