[netman]

На тва чудо могат му се изкарат и два COM порта:

Първоначално написано от http://wiki.openwrt.org/OpenWrtDocs/Hardware/Linksys/WRT54GL#head-de235b41c621bd63cc210f4bf37b7d148094e76a

Serial port


The WRT54GL has a 10 pin connection slot on the board called JP1 (JP2 on some v1.1 boards). This slot provides two TTL serial ports at 3.3V. Neither of the ports use hardware flow control, you need to use software flow control instead. Other routers may have similar connections. These two TTL serial ports on the WRT54GL router can be used as standard Serial Ports similiar to the serial ports you may have on your PC. In order to do this though you need a line driver chip that can raise the signal levels to RS-232 levels. You can not directly connect a serial port header to the board and expect it to work. That method will only work with devices that can connect to TTL serial ports at 3.3V. Connecting two which have 3.3V directly will work (TX - RX, RX - TX, GND - GND). Standard RS-232 devices cannot be directly connected which accounts for nearly all serial PC devices.

Once the modification is made you can have at most two serial ports to use for connecting devices etc. By default, OpenWrt uses the first serial port to access the built-in serial console on the router. You can connect to it at 115200,8,N,1 using a terminal program like Putty, SecureCRT or minicom for example. This is helpful because if you have problems communicating with your router this method will allow you easy access connecting over a serial console. By default this leaves you with one serial port left, however, there is a method to turn the console off giving you access to both ports if you really need them. It isn't recommended but it can be done.

Architecture
MIPS

Vendor
Broadcom

Bootloader
CFE

System-On-Chip
Broadcom 5352EKPB

CPU Speed
200 Mhz

Flash-Chip
EON EN29LV302B-70TCP

Flash size
4 MiB

RAM
16 MiB

Wireless
Broadcom BCM43xx 802.11b/g Wireless LAN (integrated)

Ethernet
Switch in CPU

USB
No

Serial
Yes

JTAG
Yes

Pin 2
3.3V
Pin 4
TX_0
Pin 6
RX_0
Pin 8
Not connected
Pin 10
GND

Pin 1
3.3V
Pin 3
TX_1
Pin 5
RX_1
Pin 7
Not connected
Pin 9
GND

http://www.dd-wrt.com/wiki/index.php/WR ... terface_IC

http://forums.overclockers.com.au/showt ... p?t=498176