I want to recover my router. I have read a lot about the serial method. I am still missing the usb serial adapter cable. Can I use a 2nd router and connect the pins direct? Or is this a stupid idea.
Is your second router using the same serial protocols as the C7? If they aren't the same, you'll get garbage.. Same if you don't have a good ground. If your can, find out what terminal settings they use by default, and if they can be changed to match. Any one being off, and you'll get garbage or nothing...
Not sure if this could be your problem, but I had one C7 once I couldnt talk to till I pulled up one of the lines, with an unusually low pull up resistor, look at the levels for that. Was almost like they put a pull down in there to keep people from using the port.