Sitecom WL-351 – OpenWRT

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WORK IN PROGRESS

At the moment I’m trying to flash my Sitecom WL-351 router with the OpenWRT firmware.
First steps have been made by opening the case and soldering wires to the serial port holes of the PCB.

I only use the GND, TX and RX pins and left the VCC connection unconnected (the router will provide its own power as will the computer from which the firmware needs to uploaded).

You cannot simply connect these wires to a serial port (if I have had one) but should use a USB to RS232 TTL Converter Module when you want to connect the serial ‘port’ of the router to the USB port of the computer. Luckily I had one USB-BUB II (used to flash my JeeNodes) which works perfectly. (For more information visit this OpenWRT page)

Once the two devices was connected by wires I started putty to open serial connection, for the Sitecom WL-351 the baudrate is 57000 (extra parameters 8N1). When the console is started I switched the power toggle of the router and …. yes I saw meaningful lines of text coming from the router.

On the OpenWRT site I used this page to get started.

to be continued

Linux screen command

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Working remote on your Linux system through ssh requires for some actions which take long that you keep your session en terminal open for a long time. To overcome this need there is a nice tool called screen. This enables use to detach a session from the terminal and re-attach it later. It provides the possibility to shutdown your ssh session and keep the process running. At a later point in time you can start a new ssh session from anywhere and re-attach the process.

To install on Raspbian just execute
sudo apt-get install screen

To use it
sudo screen

To detach the process press Ctrl-A d

To re-attach the screen
sudo screen -r

To see all screens
sudo screen -ls

To re-attach a specific screen
sudo screen -r 7849 , where 7849 is the screen ‘process’ number

A much better how-to can be found here.