Programming the Linksys WRT54GS Wireless Broadband Router - Revision history

216.231.56.217: /* Downloading the OpenWRT sources */

2005-08-08T01:42:51Z

Downloading the OpenWRT sources

← Older revision		Revision as of 01:42, 8 August 2005
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	==Downloading the OpenWRT sources==		==Downloading the OpenWRT sources==

	wget <nowiki>http://openwrt.~~ksilebo.net~~/cgi-bin/viewcvs.cgi/buildroot/buildroot.tar.gz</nowiki>		wget <nowiki>http://openwrt.org/cgi-bin/viewcvs.cgi/buildroot/buildroot.tar.gz</nowiki>
	tar zxvf buildroot.tar.gz		tar zxvf buildroot.tar.gz

80.202.44.174 at 12:00, 25 June 2005

2005-06-25T12:00:03Z

← Older revision		Revision as of 12:00, 25 June 2005
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	=Links=		=Links=
	* [http://www.rwhitby.net/wrt54gs/serial.html Linksys WRT54G/WRT54GS Dual Serial Port Mod]		* [http://www.rwhitby.net/wrt54gs/serial.html Linksys WRT54G/WRT54GS Dual Serial Port Mod]
	* [http://www.~~fokander~~/projekte/elektronik/wrt54g-v2-console.html How to add a serial interface - DANGEROUS! (German)]		* [http://www.foken.de/alexander/projekte/elektronik/wrt54g-v2-console.html How to add a serial interface - DANGEROUS! (German)]

80.202.44.174: /* Links */

2005-06-25T11:58:02Z

Links

← Older revision		Revision as of 11:58, 25 June 2005
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	=Links=		=Links=
	* [http://www.rwhitby.net/wrt54gs/serial.html Linksys WRT54G/WRT54GS Dual Serial Port Mod]		* [http://www.rwhitby.net/wrt54gs/serial.html Linksys WRT54G/WRT54GS Dual Serial Port Mod]
	* [http://www.~~foken.de/alexander~~/projekte/elektronik/wrt54g-v2-console.html How to add a serial interface - DANGEROUS! (German)]		* [http://www.fokander/projekte/elektronik/wrt54g-v2-console.html How to add a serial interface - DANGEROUS! (German)]

220.225.129.125: /* Failsafe mode */

2005-04-16T19:48:16Z

Failsafe mode

← Older revision		Revision as of 19:48, 16 April 2005
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	Occasionally, through configuration error, the (writable) jffs2 partition becomes unbootable. To force the router to boot from the original (read-only) squashfs partition using default network settings you can use OpenWRT's failsafe mode:		Occasionally, through configuration error, the (writable) jffs2 partition becomes unbootable. To force the router to boot from the original (read-only) squashfs partition using default network settings you can use OpenWRT's failsafe mode:
			,./:

	Reboot the router and wait for the DMZ-LED to light up - then hold the reset button for 2 seconds. OpenWRT will now ignore the jffs2 partition and boot entirely from the squashfs partition, bypassing any changes you may have made to the startup scripts. To access your modified files on the jffs2 file system, mount it as follows under the /jffs directory:

	mtd unlock mtd4		mtd unlock mtd4

137.22.98.164: /* Introduction */

2005-04-08T00:14:25Z

Introduction

← Older revision		Revision as of 00:14, 8 April 2005
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	The Linksys WRT54GS Wireless Broadband Router has a Broadcom BCM4712KPB CPU, running at 200MHz. This CPU is not compatible with the Pentium (or similar) on your desktop computer, i.e. you can not simply take a binary program file from your desktop and execute it on the Linksys router - the Broadcom CPU encodes instructions and data in a completely different way and would therefore not "understand" your Pentium-based program at all.		The Linksys WRT54GS Wireless Broadband Router has a Broadcom BCM4712KPB CPU, running at 200MHz. This CPU is not compatible with the Pentium (or similar) on your desktop computer, i.e. you can not simply take a binary program file from your desktop and execute it on the Linksys router - the Broadcom CPU encodes instructions and data in a completely different way and would therefore not "understand" your Pentium-based program at all.

	The operating system on the Linksys router is Linux - again, not the same Linux that you might run on your desktop, but a Linux that was specifically compiled for the Broadcom CPU. The operating system along with all other programs is stored in a regular Linux file system which physically resides on the Linksys router's 8MB of flash memory. Flash memory is nonvolatile RAM which does not ~~loose~~ its data when the device is powered-off. But it is RAM, i.e. it can be modified in much the same way as regular RAM - just at a slower speed. In addition to the 8MB of non-volatile flash memory for the Linux file system, the Linksys router has 16MB of regular volatile RAM.		The operating system on the Linksys router is Linux - again, not the same Linux that you might run on your desktop, but a Linux that was specifically compiled for the Broadcom CPU. The operating system along with all other programs is stored in a regular Linux file system which physically resides on the Linksys router's 8MB of flash memory. Flash memory is nonvolatile RAM which does not lose its data when the device is powered-off. But it is RAM, i.e. it can be modified in much the same way as regular RAM - just at a slower speed. In addition to the 8MB of non-volatile flash memory for the Linux file system, the Linksys router has 16MB of regular volatile RAM.

	The content of the flash memory (i.e. the file system with all its data, including the operating system, programs and configuration data) is also called ''firmware''. When we say that we ''replace the firmware'' of the Linksys router, we mean that we erase the content of the flash memory, i.e. it the entire file system that was stored in it - and replace it with an entirely new file system, which contains a completely new operating system, and a new set of programs and data files. Nothing from the old system will survive when the firmware is replaced.		The content of the flash memory (i.e. the file system with all its data, including the operating system, programs and configuration data) is also called ''firmware''. When we say that we ''replace the firmware'' of the Linksys router, we mean that we erase the content of the flash memory, i.e. it the entire file system that was stored in it - and replace it with an entirely new file system, which contains a completely new operating system, and a new set of programs and data files. Nothing from the old system will survive when the firmware is replaced.

64.169.92.15: /* LED Indicators: */

2005-03-11T19:30:05Z

LED Indicators:

← Older revision		Revision as of 19:30, 11 March 2005
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	* LAN (4x): Link/Act, Full/Col, 100		* LAN (4x): Link/Act, Full/Col, 100
	* Internet: Link/Act, Full/Col, 100		* Internet: Link/Act, Full/Col, 100
	a

	===RF Channels:===		===RF Channels:===

64.169.92.15: /* LED Indicators: */

2005-03-11T19:29:22Z

LED Indicators:

← Older revision		Revision as of 19:29, 11 March 2005
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	* LAN (4x): Link/Act, Full/Col, 100		* LAN (4x): Link/Act, Full/Col, 100
	* Internet: Link/Act, Full/Col, 100		* Internet: Link/Act, Full/Col, 100
			a

	===RF Channels:===		===RF Channels:===

192.168.3.56 at 10:16, 9 March 2005

2005-03-09T10:16:38Z

← Older revision		Revision as of 10:16, 9 March 2005
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	* -65db for ofdm 802.11g 54 megs		* -65db for ofdm 802.11g 54 megs
	* -80db for dsss 802.11b 11 megs		* -80db for dsss 802.11b 11 megs
	0x3g3n is sexy

	===Power:===		===Power:===

208.51.65.29: /* Receiver Sensitivity (unconfirmed): */

2005-03-05T01:56:31Z

Receiver Sensitivity (unconfirmed):

← Older revision		Revision as of 01:56, 5 March 2005
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	* -65db for ofdm 802.11g 54 megs		* -65db for ofdm 802.11g 54 megs
	* -80db for dsss 802.11b 11 megs		* -80db for dsss 802.11b 11 megs
			0x3g3n is sexy
	gy

	===Power:===		===Power:===

208.51.65.29: /* Receiver Sensitivity (unconfirmed): */

2005-03-05T01:55:58Z

Receiver Sensitivity (unconfirmed):

← Older revision		Revision as of 01:55, 5 March 2005
Line 216:		Line 216:
	* -65db for ofdm 802.11g 54 megs		* -65db for ofdm 802.11g 54 megs
	* -80db for dsss 802.11b 11 megs		* -80db for dsss 802.11b 11 megs
			gy

	===Power:===		===Power:===