simhaa.blogg.se - Debrick Router Serial

DEBRICK ROUTER SERIAL INSTALL
DEBRICK ROUTER SERIAL SERIAL
DEBRICK ROUTER SERIAL DRIVERS
DEBRICK ROUTER SERIAL DRIVER
DEBRICK ROUTER SERIAL PC

NOTE: the OS (Linux->DD-WRT) reset command Hard_reset_or_30/30/30#Erasing_NVRAM depends on the build/date. Bad nvram values are often the cause of bricked routers. The most common CFE command is "nvram erase". `devinfo set " can be used to change values. To see the built-in CFE default parameters (restored after a `nvram erase` or reset): NOTE: Ensure the Scroll Lock key is off and Flow Control is off or none, or the boot will not stop. It helps to get someone to help with this process, or have good dexterity. The time window to do this is less than a second or two. Do this by rapidly hitting Cntl-C (tpl for TP-Link routers) JUST as the router is starting up.

' There is less than a second at power-up to break CFE and stop the boot, thus allowing keyboard entry in a terminal. I have purchased a few of the Nokia clones that didn't work, for that reason I buy USB to uart adapters like these. Windows XP mode is the solution in such a case.

DEBRICK ROUTER SERIAL DRIVER

Cheap CA-42 is ok, even the Chinese clone with ARK3116 chip, thus you will not find proper driver for Win7 64bit system.

DEBRICK ROUTER SERIAL SERIAL

The "level shifting 3.3v TTL adapter" is a must, you can't connect router straight to standard RS232 serial interface. My first CA-42 had 3 wires and the ones I bought later had 5, the picture in my post above is from one of those.You can carefully remove the plastic molding of the phone connector and see where each wire is going and find out which colour the respective signals are on. No there is no fixed standard for the colours of the wires and obviously not on the number of wires either.

Once loaded and connected, my laptop sees the unit attached to COM8 to configure Putty, and all is well.

The updated 1.4.17 driver supposedly provides better support for Vista/Win7.

I downloaded a utility determining the attached hardware UVCViewer.

DEBRICK ROUTER SERIAL DRIVERS

The cable was not recognized in XP and no drivers found during the PnP process.

Using the "guess" method, the Blue wire connects to the router Rx and Red connects to router Tx.

Using an Ohm meter I determined that the Orange wire is Ground.

I cut the connector end off and found 3 wires: Blue, Red, and Orange.

If no wire is connected to pin 8, the pin marked pin 2 in this picture should be ground instead.

See this picture: You only need the wires connected to pins 8, 7, and 6. Tx on the adapter goes to rx on the router and rx on the adapter goes to tx on the router. You need only grd, tx and rx connected properly for the serial interface to work. Then you have to figure out what each wire does. You can get Nokia CA-42 cables online for about 3.00 and cut the phone end off. Other proper serial adapter are available from ebay and amazon and other online sources. YOU CANNOT USE A SERIAL ADAPTER THAT IS NOT LEVEL SHIFTING! The Nokia CA-42 cable is a level shifting serial adapter. You NEED a level shifting 3.3v TTL serial adapter.

To save the configuration: Click Session, enter a name for your connection under saved sessions, Save.

Select Serial under Connection, use the port used for serial (e.g.

Putty: check the Device Manager (Win) or `dmesg` output (Linux) for the COM port name

To save the configuration, click File->Save As, and select a save location.

HyperTerminal in Windows XP: Start Button->All Programs->Accessories->Communication->HyperTerminal

PuTTY (All), HyperTerminal (WinXP and older), minicom (Linux), picocom (Linux), terminalbpp (Win).

DEBRICK ROUTER SERIAL PC

You connect and talk to the router from a PC using terminal/console programs such as: On routers with two Serial ports (Tx0/Tx1 and Rx0/Rx1), use the "0" ports for your connections (I've not seen a router yet that connects to the "1" side). Rx and Tx are labeled relative to the cable, so Rx line needs connected to the router's Tx, because the router labels are also relative to it, so Tx and Rx get crossed for proper connection. Then you can guess at the Rx and Tx lines. Some boards are NOT marked with pin designation, so use a multimeter to determine power and ground to avoid shorting the serial cable TTL chip. There are three or four connections for serial to function properly: Vcc (+3.3V, but usually not connected), GND, Tx and Rx. Serial cable can be either USB or DB9 connection type and be capable of voltage level shift to +3.3V, not +5V. Some routers have serial ports inside the WAN port, and here is a link to some Serial port pinouts.

DEBRICK ROUTER SERIAL INSTALL

Unless it has an OEM header, you have to either solder the wires to the pads, or remove solder from the holes to install an appropriate header. Serial ports are normally four or five pins on the router board. The last resort is to desolder the flash chip and use a programmer to flash CFE (if needed) and firmware. Otherwise JTAG is required to debrick, if available, which can also replace a corrupted CFE. Routers with a serial port AND working CFE (bootloader) can often be recovered with a serial adapter, using CFE low-level commands.