Show pagesourceOld revisionsBacklinksBack to top × Table of Contents ASUS RT-AC51U (RT-AC750) Supported Versions Hardware Highlights Installation ASUS Firmware Restoration Tool TFTP method Install LuCI Upgrade LuCI Web Upgrade Process Terminal Upgrade Process Notes Tags ASUS RT-AC51U (RT-AC750) Supported Versions BrandModelVersionCurrent ReleaseOEM InfoForum TopicTechnical DataASUSRT-AC51U23.05.0https://www.asus.com/Networking/RTAC51U/View/Edit data Hardware Highlights ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSBRT-AC51UMediaTek MT7620A5801664MediaTek MT7610E, MediaTek MT7620Ab/g/na/n/ac5-1x 2.0 Installation ModelVersionCurrent ReleaseFirmware OpenWrt InstallFirmware OpenWrt UpgradeFirmware OEM StockRT-AC51U23.05.0https://downloads.openwrt.org/releases/23.05.0/targets/ramips/mt7620/openwrt-23.05.0-ramips-mt7620-asus_rt-ac51u-squashfs-sysupgrade.binhttps://www.asus.com/Networking/RTAC51U/HelpDesk_BIOS/ → Install OpenWrt (generic explanation) ASUS Firmware Restoration Tool Easiest solution for Windows users, confirmed working as of June 2019. Download the ASUS Firmware Restoration Tool but don't open it yet (Recommended version) Unplug your computer from the router Put the router into Rescue Mode by: turning the power off, using a pin to press and hold the reset button, then turning the router back on while keeping the reset button pressed for ~5 secs until the power LED starts flashing slowly (which indicates the router has entered Rescue Mode) Important (if you don't do this next step the Asus Firmware Restoration Tool will wrongly assume that the router is not in Rescue Mode and will refuse to flash it): go to the Windows Control Panel and temporarily disable ALL other network adapters except the one you will use to connect your computer to the router For the single adapter you left enabled, temporarily give it the static IP 192.168.1.10 and the subnet mask 255.255.255.0 Connect a LAN cable between your computer (make sure to use the Ethernet port of the adapter you've just set up) and port 1 of the router (not the router's WAN port) Rename openwrt-XX.XX.X-ramips-mt7620-rt-ac51u-squashfs-sysupgrade.bin to factory.trx Open the Asus Firmware Restoration Tool, locate factory.trx and click upload (if Windows shows a compatibility prompt, confirm that the tool worked fine) Flashing and reboot is finished when the power LED stops blinking and stays on That's it! (Don't forget to re-enable any network adapters you disabled earlier) See also Asus 'How to use Rescue Mode' FAQ TFTP method Download the OpenWrt firmware image Unplug the power cord from the router Press the reset button with a pin and keep holding it down Plug the power cord in Wait 10 seconds Release the reset button On your computer, set *this* static IP to the network adapter connected to the router (IP 192.168.1.75, Subnet 255.255.255.0, connect to the first LAN port of the router) Use tftp -client to download the firmware image tftp> binary tftp> timeout 120 tftp> connect (to) 192.168.1.1 tftp> put openwrt-XX.XX.X-ramips-mt7620-rt-ac51u-squashfs-sysupgrade.bin The power LED flashes quickly while the router is being flashed Flashing is successful when the power LED is constantly lit Install LuCI After you flashed the base image, wait until the router reboots and the power LED to be constantly lit Connect to the router via ssh using the following command:ssh root@192.168.1.1 No password is required for the first login (remember to set a strong root password for better safety) Follow the official documentation for the LuCI installation Upgrade LuCI Web Upgrade Process Download the sysupgrade image Browse to http://192.168.1.1/cgi-bin/luci/admin/system/flash (LuCI > System > Backup / Flash Firmware) Click Flash Image Upload sysupgrade image Confirm the upgrade Wait for the device to reboot (steady power LED) Note: Depending on your firmware version, you might have to re-install LuCI and any extraneous packages after the upgrade Terminal Upgrade Process Use the following commands to upgrade:ssh root@192.168.1.1 cd /tmp wget <sysupgrade image link> sysupgrade <freshly downloaded image>.bin Wait for the device to reboot (steady power LED) Notes Pull request to LEDE OpenWrt forum thread with infos + pictures GPL http://dlcdnet.asus.com/pub/ASUS/wireless/RT-AC51U/GPL_RT_AC51U_30043807378.zip https://www.asus.com/uk/supportonly/RT-AC51U/HelpDesk_Download/ (then Others > Others > GPL) It seems that 5GHz isn't supported in 18.06.2. Use snapshot for that As of Stable 19.07.1, 5GHz is working on this router Only power LED works, regardless of the LED configuration settings. A workaround to enable LEDs (all except 5Ghz) has been discovered on the forums LEDs are working since 19.07.61) Dec'21: Reports of intermittent reboots with 21.02. Link to OWrt forum Apr'22: Alternative name for RT-AC51U is RT-AC750. (see the original firmware image form ASUS - they compare the same). Tags How to add tags ramips, mediatek, FastEthernet, mt7620a, mt7620, mt7610E, usb, usb2.0, 1usb, 64RAM, 16flash, wlan, mips, mips32, 24k, 24kec, serial, U-boot, 5port, 2x2, 2ant, 12v powered 1) https://forum.openwrt.org/t/small-issue-on-rt-ac51u-page/92099 This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.OKMore information about cookies ramips mediatek fastethernet mt7620a mt7620 mt7610e usb usb2.0 1usb 64RAM 16flash wlan mips mips32 24k 24kec serial u-boot 5port 2x2 2ant 12v powered Last modified: 2022/04/12 05:56by ruzickja