Posted: Thu Oct 07, 2010 17:28 Post subject: HELP!!!! SEMI BRICKED ROUTER
Can someone tell me how to make a serial cable for my Buffalo WZR-HP-G300NH I have already solder the pins on the board I do not want to have to order a cable and wait for days can someone tell me how to make one by maybe getting the parts at Radio Shack?
If you used the type of USB<->Serial converter that you normally buy in a computer shop, then you have the wrong one and it usually produces garbage like that.
That type of USB<-> Serial is for RS232 ie +-12V levels while your router has TTL 3.3V levels on its serial port.
You need a level converter and that is why mobile phone cables like Nokia DKU-5 or CA-42 are so popular, they go directly from USB to TTL 3.3V.
You can also buy this type of USB<->TTL 3.3V level converter as a small module from electronics suppliers. _________________ Kernel panic: Aiee, killing interrupt handler!
Posted: Fri Oct 08, 2010 8:20 Post subject: Re: Screenshot
I used a serial to usb adapator and used a D9 cable to interface with the Serial pinouts on the board it seems to work but i get a bunch of garbage can someone explain this to me?
Break it off and you should find two chips, one to convert USB to +3.3V LVTTL RS232 and the other from +3.3V LVTTL RS232 to RS232. The later could be a MAX3232. Locate the +3.3V TX/RX and connect to WZR-HP-G300NH.
Below pic just to give you some idea.
Search "RS232 TTL MAX3232" or "RS232 TTL USB" on eBay and you'll find what you need. This one for example is made from Nokia CA-42 and you don't have to solder by yourself. I'd prefer cables which contain Prolific PL2303 USB to serial converter because the driver is easy to get.