How to terminate console on serial port (UART)

https://wiki.openwrt.org/doc/recipes/terminate.console.on.serial

First method (NO need re-build the Kernel):

1. Edit sysctl.conf file on your device:

/etc/sysctl.conf

Add the new line at the begining of this file:

kernel.printk = 0 4 1 7

2. Edit inittab file on your device:

/etc/inittab

up to revision r28294
Find line in this file:

ttyS0::askfirst:/bin/ash --login
ttyATH0::askfirst:/bin/ash --login

Edit the line by following example:

#ttyS0::askfirst:/bin/ash --login
#ttyATH0::askfirst:/bin/ash --login

since revision r36992
Find line in this file:

::askconsole:/bin/ash --login

Edit the line by following example:

#::askconsole:/bin/ash --login

3. Reboot your device.

https://grenville.wordpress.com/2011/11/24/serial-console-tplink-wr1043…