ASUS RP-AC51

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abgn+ac (AC750)
AC750 Dual Band WiFi Range Extender
Homepage Product page
Wikipedia Asus routers
WikiDevi.wi-cat.ru ASUS RP-AC51
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev ASUS RP-AC51 A1
Serial number prefix 90IG03Y0-BU2410
FCC ID MSQ-RPAC4200
IC ID 3568A-RPAC4200
Type range extender, media bridge
CPU1 checkY Qualcomm Atheros QCA9531
CPU1 Type MIPS 24Kc
CPU1 Speed 650 MHz
Flash1 Chip Winbond W25Q128JVSIG
Flash1 Size 16 MiB 16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
RAM1 Size 128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br />
RAM1 Chip Winbond W971GG6SB-25
ETH chip1 Qualcomm Atheros QCA9531
Ethernet Port Count 1-100MbE-LAN
Wired Standard IEEE 802.3i/3u

802dot11 OUI: none specified

Stock bootloader U-Boot
Expansion IF types none specified
Power 100-240 VAC ~ 50/60 Hz, 0.18 A
Connector type AC (direct)
Serial Port (UART) yes, 4-pin header, J1

Flags:
MU-MIMO, 256QAM, VHT80, AiMesh, heatsink

Other

Default login user: admin
Default login password: admin
admin:admin credentials used by 1358 additional devices
of which 209 are ASUS devices

Manuf/OEM/ODM SGE (T&W) AP-QCAL0 -0003 Rev1.0
3rd Party Firmware Support OpenWrt • (List | Dev | DLs)
Retail
Availability US/CA
FCC approval date 09 April 2020
(Est.) release date September 2019
ASINs B08CQM87S5
B07577ZQTB
Country of manuf China
Radio 1
Chip1 Qualcomm Atheros QCA9531
Wireless interface OUI none specified
Antenna Connector Type U.FL
MIMO status 2x2:2
Wireless Standard IEEE 802.11b/g/n
802.11n up to 300 Mbps
802.11g up to 11 Mbps
802.11b up to 11 Mbps
WiFi Operating Frequency 2.4 GHz
Radio 2
Chip1 Qualcomm Atheros QCA9887
Wireless interface OUI none specified
Antenna Connector Type U.FL
MIMO status 1x1:1
Wireless Standard IEEE 802.11a/n/ac
802.11ac up to 433 Mbps
802.11n up to 150 Mbps
802.11a up to 54 Mbps
WiFi Operating Frequency 5 GHz

For a list of all currently documented Qualcomm Atheros (QCA) chipsets with specifications, see Qualcomm Atheros.

For a list of all currently documented ASUS devices with specifications, see ASUS.

300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.),
433 Mbps - 1SS 5GHz 802.11ac (80MHz chan.) = AC750 class

Overview

FCC ID: MSQ-RPAC4200 (04/09/2020)

Flashing

Flashing OpenWrt

Target: ath79
Subtarget: generic
Package architecture: mips_24kc
Supported Since Commit
Support started version: 23.05.0
Current supported version: 25.12.5
WLAN Comment: Qualcomm Atheros QCA9531, Qualcomm Atheros QCA9886
Installation method(s):
Asus Firmware Restoration tool, U-Boot TFTP recovery, see git-commit
Recovery method(s):
Asus Firmware Restoration tool, U-Boot TFTP recovery, see git-commit
git • >>
ath79: add support for ASUS RP-AC51
Asus RP-AC51 Repeater
Category:
AC750 300+433 (OEM w. unstable driver)
AC1200 300+866 (OpenWrt w. stable driver)

Hardware specifications:
Board: AP147
SoC: QCA9531 2.4G b/g/n
WiFi: QCA9886 5G n/ac
DRAM: 128MB DDR2
Flash: gd25q128 16MB SPI-NOR
LAN/WAN: AR8229 1x100M
Clocks: CPU:650MHz, DDR:600MHz, AHB:200MHz

MAC addresses as verified by OEM firmware:
use address source
Lan/W2G *:C8 art 0x1002 (label)
5G *:CC art 0x5006

Installation:

Asus windows recovery tool:

install the Asus firmware restoration utility
unplug the router, hold the reset button while powering it on
release when the power LED flashes slowly
specify a static IP on your computer:
IP address: 192.168.1.75
Subnet mask 255.255.255.0
Start the Asus firmware restoration utility, specify the factory image
and press upload
Do not power off the device after OpenWrt has booted until the LED flashing.
TFTP Recovery method:

set computer to a static ip, 192.168.1.10
connect computer to the LAN 1 port of the router
hold the reset button while powering on the router for a few seconds
send firmware image using a tftp client; i.e from linux:
$ tftp
tftp> binary
tftp> connect 192.168.1.1
tftp> put factory.bin
tftp> quit

Pictures

Retail Images

See also

ASUS RP series