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toh:linksys:wrt300n1 [2013/04/13 10:32]
laibsch fix URL
toh:linksys:wrt300n1 [2015/11/30 22:14] (current)
tmomas [[meta:tags]] -> [[meta:tags|How to add tags]]
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 +====== Linksys WRT300n v1 ======
 +802.11n "​draft"​ MIMO router with 100 Mbit/s switches.
  
 +===== Supported Versions =====
 +
 +^ Version/​Model ^ Launch Date ^ S/N ^ OpenWrt Version Supported ^ Model Specific Notes ^
 +| v1 |  2006-07 ​ | CNP01 | Trunk ([[https://​dev.openwrt.org/​changeset/​45293|r45293]]) | - |
 +
 +Later versions (1.1, 2.0) are //​significantly//​ different hardware, so for the purposes of OpenWRT consider v1 a distinct model.
 +
 +===== Hardware Highlights =====
 +^ CPU ^ Ram ^ Flash ^ Network ^ USB ^ Serial ^ JTag ^
 +| Broadcom 4704@300MHz | 32MiB | 4MiB | 4 + 1| No | Yes | Yes/3.02 |
 +
 +===== Installation =====
 +  - -> [[doc:​howto:​obtain.firmware]]
 +  - -> [[doc:​howto:​generic.flashing|Install OpenWrt]]
 +
 +==== Flash Layout ====
 +Please check out the article [[doc:​techref:​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.
 +  *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
 +
 +==== OEM installation using the TFTP method ====
 +
 +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.
 +
 +==== Upgrading OpenWrt ====
 +->  [[doc:​howto:​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.
 +
 +=== Terminal Upgrade Process ===
 +
 +  * Login as root via SSH on 192.168.1.1 (or whatever you configured it to).
 +  * Use the following commands to upgrade:
 +<​code>​
 +cd /tmp/
 +wget http://​downloads.openwrt.org/​snapshots/​trunk/​brcm47xx/​openwrt-brcm47xx-squashfs.trx
 +sysupgrade /​tmp/​openwrt-brcm47xx-squashfs.trx
 +</​code>​
 +
 +===== Basic configuration =====
 +-> [[doc:​howto:​basic.config|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.
 +^ Port ^ Switch port ^
 +| Internet (WAN) | 4 | 
 +| LAN 1 | 3 | 
 +| LAN 2 | 2 | 
 +| LAN 3 | 1 | 
 +| LAN 4 | 0 | 
 +
 +==== Failsafe mode ====
 +-> [[doc:​howto:​generic.failsafe]]
 +
 +==== Buttons ====
 +-> [[doc:​howto:​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:
 +^ BUTTON ^ Location ^ Event ^
 +| Reset | back | reset | 
 +| Reserved | top | ses | 
 +
 +===== Hardware =====
 +==== Info ====
 +| **[[wp>​Instruction set|Architecture]]:​** ​   | [[wp>​MIPS architecture|MIPS]] |
 +| **Vendor:​** ​         | [[wp>​Broadcom]] |
 +| **[[doc:​techref:​Bootloader]]:​** ​    | [[doc:​techref:​bootloader:​cfe|CFE]] v4 |
 +| **[[doc:​hardware:​soc|System-On-Chip]]:​** ​ | Broadcom 4704 |
 +| **[[doc:​hardware:​cpu|CPU]]/​Speed** ​       | Broadcom BMIPS3300 V0.6 @300MHz|
 +| **Flash-Chip:​** ​     | Intel JS28FR320 C3BD70 A5437913 |
 +| **Flash size:​** ​     | 4 MiB |
 +| **RAM:​** ​            | 32 MiB   |
 +| **RAM-Chip:​** ​       | hynix 602U HY5DU281622ETP-J |
 +| **Wireless:​** ​       | Broadcom BCM4321 2.4ghz 802.11bgn |
 +| **Ethernet:​** ​       | Broadcom 4704 |
 +| **Ethernet Switch:** | Broadcom BCM5325 |
 +| **USB:​** ​            | No (maybe with some hw mods, BCM4704 supports it) |
 +| **[[doc:​hardware:​port.serial|Serial]]:​** ​         | [[#​Serial|Yes]] |
 +| **[[doc:​hardware:​port.jtag|JTAG]]:​** ​           | [[#​JTAG|Yes]] ​ |
 +
 +==== Photos ====
 +[[https://​fjallfoss.fcc.gov/​oetcf/​eas/​reports/​ViewExhibitReport.cfm?​mode=Exhibits&​RequestTimeout=500&​calledFromFrame=N&​application_id=704503&​fcc_id=%27Q87-WRT300N%27|FCC Exhibits List]]
 +
 +Model Number
 +
 +//Front://
 +
 +FIXME Extract from FCC Exhibits
 +
 +//Back://
 +
 +FIXME Extract from FCC Exhibits
 +
 +==== Opening the case ====
 +**Note:** This will void your 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//
 +
 +FIXME Extract from FCC Exhibits
 +
 +==== Serial ====
 +[[https://​forum.openwrt.org/​viewtopic.php?​id=15447|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
 +
 +-> [[doc:​hardware:​port.serial|general information]] about the serial port, serial port cable, etc.
 +
 +==== JTAG ====
 +-> [[doc:​hardware:​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**
 +
 +
 +===== Debricking =====
 +-> [[doc:​howto:​generic.debrick]]
 +
 +===== Bootloader Mods =====
 +  - you could read about [[doc:​techref:​bootloader]] in general
 +
 +===== Hardware mods =====
 +  - as a beginner, you really should inform yourself about [[doc:​hardware:​soldering]] in general and then obtain some practical experience!
 +
 +===== Notes =====
 +  * b43legacy is limited to 54 Mbps with the BCM4306 radio.
 +
 +===== Tags =====
 +[[meta:​tags|How to add tags]]
 +
 +{{tag>​bcm47xx bcm4704 FastEthernet 5Port 2nic DetachableAntenna 32RAM 4Flash MIPS MIPS32}}