Serial port over Ethernet Mifi and others

How to setup a serial port over Ethernet
using the RS232 connector with TTL converter

You can try ser2net, and run a TCP232 program in your PC.

  • Install ser2net

    opkg update && opkg install ser2net
  • Configure ser2net

    vi /etc/config/ser2nt
    config proxy
        option enabled 1
        option port 5002
        option protocol raw
        option timeout 0
        option device '/dev/ttyATH0'
        option baudrate 115200
        option databits 8
        option parity 'none'
        option stopbits 1
  • Disable Debug Console

    Comment on this line ::askconsole:/bin/ash --login in /etc/inittab.

    # cat /etc/inittab 
    ::sysinit:/etc/init.d/rcS S boot
    ::shutdown:/etc/init.d/rcS K shutdown
    # ::askconsole:/bin/ash --login
  • Reboot device