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Buffalo BroadStation BHR-4RV

Buffalo BroadStation BHR-4RV router w/ 4-port AUTO-MDIX switch, the board is identical to WZR-RS-G54, only without the WiFi.

Hardware Highlights

CPU Ram Flash Network USB Serial JTag
BroadCom BCM4704KPBG 8MiB 32MiB 4 x 1 No Yes ?


Flash Layout

Please check out the article flash.layout. It contains an example and a couple of explanations.

OEM easy installation

This section deals with how you install OpenWrt from a device freshly opened. Plus the steps required such as reset to factory defaults if the device has already been configured

Note: Reset router to factory defaults if it has been previously configured.

OEM installation using the TFTP method

If you want to upgrade using TFTP you follow these steps (as an alternative to the above install process.

Upgrading OpenWrt


If you have already installed OpenWrt and like to reflash for e.g. upgrading to a new OpenWrt version you can upgrade using the mtd command line tool. It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

LuCI Web Upgrade Process

Terminal Upgrade Process

  • Login as root via SSH on
  • Use the following commands to upgrade.
cd /tmp/
sysupgrade /tmp/
  • If sysupgrade does not support this router, use the following commands.
cd /tmp/
mtd write /tmp/ linux && reboot

Basic configuration

Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

Specific Configuration


The default network configuration is:

Interface Name Description Default configuration
br-lan LAN & WiFi
vlan0 (eth0.0) LAN ports (1 to 4) None
vlan1 (eth0.1) WAN port DHCP
wl0 WiFi Disabled

Switch Ports (for VLANs)

Numbers 0-3 are Ports 1-4 as labeled on the unit, number 4 is the Internet (WAN) on the unit, 5 is the internal connection to the router itself. Don't be fooled: Port 1 on the unit is number 3 when configuring VLANs. vlan0 = eth0.0, vlan1 = eth0.1 and so on.

Port Switch port
Internet (WAN) 4
LAN 1 3
LAN 2 2
LAN 3 1
LAN 4 0

Failsafe mode


hardware.button on howto use and configure the hardware button(s).

The Linksys WRT54GL has two buttons. They are Reset and Secure Easy Setup. Here, we merely name the buttons, so we can use them in the above Howto:

Reset reset
Secure Easy Setup ses



Architecture: MIPS / ARM / AVR32 / ETRAX CRIS / 68000 / PowerPC / SPARC / Ubicom32 / SuperH / x86
Vendor: Qualcomm Atheros / Broadcom / Ikanos / Lantiq / Marvell / Ralink / …
bootloader: U-Boot / redboot / …
System-On-Chip: AR9132 rev 2 (MIPS 24Kc V7.4)
CPU/Speed 24Kc V7.4 400 Mhz
Flash-Chip: ST 25P64V6P
Flash size: 8192 KiB
RAM: 32 MiB
Wireless: Atheros AR9103 2.4ghz 802.11bgn
Ethernet: RealTek RTL8366RB Gigabit w/ vlan support swconfig
Internet: n/a/xDSL/DOCSIS/3g/LTE
USB: Yes 1 x 2.0
Serial: Yes


Model Number


Photo of front of the casing


Photo of back of the casing

Opening the case

Note: This will void your warranty!

  • To remove the cover do a/b/c

Main PCB

Photo of PCB


port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:

Photo of PCB with markings


port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:

Photo of PCB with markings


Bootloader Mods

  1. you could read about bootloader in general

Hardware mods

  1. as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience!

128MiB RAM Mod


I²C Tiny-USB Mod



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toh/buffalo/bhr-4rv.txt · Last modified: 2019/10/02 16:21 by tmomas