I uploaded my own compilation of OpenWRT but it doesn't work as expected and I have to upload a new one.
Now the only way to upload new firmware is serial port and tftp.
I tried above instructions but with no luck.
When I connect serial (CA-42) to J2 and turn on the router then nothing happens. It looks like rooter is waiting for something.
When I disconnect rooter from serial and then turn it on and then reconnect serial then I can see in putty boot sequence but when I try to press any key I always get "You chosed 3".
What I'm doing wrong?