Hi,
i want to instal OpenWrt on an TP-Link TD-W8961NB Router, to have an Router with a linux konsole, that i could access from SSH. First, i didn't know what image to use. The Router offers a web interfacce where i could upload firmware updates. But i don't what image to use because i don't which chip set it has. I tried with the broadcom facctory image (because a lot of TP-Link routers seem have broadcom chipsets, as i read) but if i tried to upload it to the web interface, a message box appeard saying (i don't know the words exactly) that the image is wrong (without any further information).
I looked to the Website of TP-Link where Images are to download. I renamed the OpenWrrt-Image like the Images which are to download from TP-Link and tried to update the firmware again (with the OpnWrt-Image). Now not a Message Box appeared, but in the website an eror was shown, that the image was not accepted by the router.
Now i opened the case of the Router and looked for an interface, where i could connect with an serial adapter and where i possibly get information about the router or can access the router. Now, i found two sets of four buttons (marked in the picture, see http://postimg.org/image/5jdd4i4mx/). To get the right PIN, i followed the instructions on http://wiki.openwrt.org/doc/hardware/port.serial. I used a voltage meter and measured the resistance and voltage between the ground (from the power supply where i connected it to the router, i alwas used the black probe on ground and the red on the pin) and the pin. The router was always on.
All Descriptions from top to down, i have the following results:
First group, solding would be required to connect (has "J2" printed to it)
- First hole (a square is drawn around it):
Resistance: not connected
Voltage: 3.37 V
- Second hole:
Resistance: not connected
Voltage: 0.05 V
- Third hole:
Resistance: 4.8 kΩ (not constant, from 2.6kΩ to 4.5kΩ)
Voltage: 0.05 V
- Fourth hole:
Resistance: not connected
Voltage: 3.32 V
Second group, unpopulated holes where i could connect pins
- First hole:
Resistance: not connected
Voltage: 3.4 V
- Second hole:
Resistance: 100Ω (Ohms, not kΩ)
Voltage: 0.025 V
- Third hole:
Resistance: not connected
Voltage: not constant, goes from 0.02 V to 0.04 V
- Fourth hole (a square is drawn around it):
Resistance: not connected
Voltage: not constant, goes from 0.03 V to 0.03 V
Because the first group of four pins is a group of unpopulated holes in the pcb where i could not insert a connector (because they were soldered so i could not connect a connector without soldering it to it) i used the second block. I connected a
http://www.amazon.de/USB-TTL-Konverter- … ds=usb+ttl
to the usb port of my computer (using Ubuntu 13.10) and installed screen. Than i connected the RXD Pin of the converter to the third pin, the TXD Pin to the fourth pin and the Groud to the second pin. I looked into /dev and found an interface ttyUSB0. I switched as root to /dev and typed (on my Ubuntu PC):
#screen ttyUSB0
But there was only shown an empty screen, no data that came from the router (if there was any data send). I switched on the TTL-Adapter the Cables for RXD and TXD and tried again, but the same result.
Could you help me? What can I do?
(Last edited by mmwifi on 14 Jun 2014, 15:06)