Linksys WRT300n v1

802.11n “draft” MIMO router with 100 Mbit/s switches.

Later versions (1.1, 2.0) are significantly different hardware, so for the purposes of OpenWRT consider v1 a distinct model.

1. → downloads
2. → Install OpenWrt

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

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.

• Browse to http://192.168.1.1/
• Update with OpenWRT .bin file
• Wait for it to reboot
• Telnet to 192.168.1.1 and set a root password

This only seems to work when the firmware is corrupt (or the bootloader thinks it is). Bootloader has a TFTP server on 192.168.1.1

Hint: when ping shows a ttl=100, the bootloader is running, while ttl=64 means the firmware is running.

→ generic.sysupgrade

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.

• Login as root via SSH on 192.168.1.1 (or whatever you configured it to).
• Use the following commands to upgrade:

cd /tmp/
wget http://downloads.openwrt.org/snapshots/trunk/brcm47xx/openwrt-brcm47xx-squashfs.trx
sysupgrade /tmp/openwrt-brcm47xx-squashfs.trx

→ Basic configuration After flashing, proceed with this.

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.

→ failsafe_and_factory_reset

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

The Linksys WRT300n has two buttons. Here, we merely name the buttons, so we can use them in the above Howto:

FCC Exhibits List

Model Number

Front:

Extract from FCC Exhibits

Back:

Extract from FCC Exhibits

→ Warranty

• To remove the cover do a/b/c

Each blue cover is held in place by 2 bracket-like clips in the front (LEDs side) and 2 round brackets in the rear (network ports side). To remove the top cover (the one with the button going through it), pull the back of the blue cover away from the router and towards the front (in such a manner that the front clips act as pivot). The round clips should release relatively easily. Then, gently shake the cover left and right until the angle bracket release from their sockets. To remove the bottom blue cover, you first need to pull the rubber feet towards you (there is a spring mechanism that will allow them to be pulled) enough so that you can rotate them 180 degrees. Once the feets are out of the way, proceed in the same manner as for the top cover.

Once the blue covers are out, you will need to unscrew 4 T10 secure Torx screws located in the corners under the bottom blue cover. After that, you will need to remove the black front part. In order to do so, you will need to squeeze all 4 pairs of arrow-like clips attaching it to the main (grey) cover. Using longnose pliers, gently squeeze one pair together and tilt the black part slightly such that the clips won't clip back again. Repeat for all 4 pairs of clips.

Main PCB

Extract from FCC Exhibits

According to simucas

• Connector (JP2) is located behind the WAN (blue) port.
• Pinout left to right): GND flow? RXD TXD VCC (assuming that the flow? is the flow-control pin from the router).
• Needs a level-shifter (MAX232 or equiv) to connect to a standard serial port.
• Settings: 115200 8-n-1

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

→ 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

→ generic.debrick

1. you could read about bootloader in general

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

• b43legacy is limited to 54 Mbps with the BCM4306 radio.

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