As far as I understand, you are trying to connect Arduino board to your router's console port, that you've soldered. The device name is /dev/ttyATH0
.
I would make following test. If Arduino sends something on start, you can set the desired baudrate via stty
and then execute cat /dev/ttyATH0
and see, if startup message appears.
If Arduino awaits commands, before it sends data, you will need minicom
or screen
, so that you can send/receive data over serial link.
Possible issues: this port is owned by both kernel (console=ttyATH0,115200
) and init processes (see /etc/inittab
), that means, that even if can use the port, kernel messages can interfere with your data.