Hello- This transistor is an amplifier, but I believe it does the level-shifting required to make this work. The signal coming out of your board is 0-5V vs rs232 is -12 to +12 or something of that sort (i'm no expert).
As noted below the section with the BC337 ( http://wiki.openwrt.org/doc/hardware/port.serial#from.a.pda.or.cell.phone.serial.cable) and also above in a brief note, an cell phone adapter can be used. My TTL<->rs232 converter is an old siemens cell phone data cable with the wires hacked and some terminals crimped onto it. Yes, some level converter is obligatory for serial port to work http://wiki.openwrt.org/doc/hardware/port.serial#level.conversion I'm unclear about what you mean in your p.s. hope this helps. On Mon, Dec 2, 2013 at 12:07 PM, major_ghz <[email protected] > wrote: > Le Mon, 2 Dec 2013 07:21:38 -0800, > camden lindsay <[email protected]> a écrit : > > > I try to re-flash by nftp, that is the method was i use. > no change. > > i try to make a serial cable rs232 but i am not exactly BC337, what the > fonction of this transistor ? > need to by a rs232 plug but i have the E12 resistor series > > a max232 is obligatory for the serial liaison work ? > > after how i connect on the router by serial cable ? > > Regard, > major. > > ps: in the futur it's more commonly to use another submask for connect > to the router, the most box use 192.168.1.0 for connect to internet and > it's can't possible to have internet at the same time with a flashed's > router as we have two Ethernet card. and it's more easy we can search > when we are a problem. > _______________________________________________ > openwrt-users mailing list > [email protected] > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-users >
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