SUBSYSTEM=="usb", ATTR{idVendor}=="04e8", MODE="0666", GROUP="plugdev"

lsusb
Bus 001 Device 014: ID 04e8:6860 Samsung Electronics Co., Ltd GT-I9100 Phone [Galaxy S II], GT-I9300 Phone [Galaxy S III], GT-P7500 [Galaxy Tab 10.1]

[global]
model = AT
connection = serial
port = /dev/ttyACM0

sudo gnokii --identify
GNOKII Version 0.6.31
LOG: debug mask is 0x1
Config read from file /etc/gnokiirc.
phone instance config:
model = fake
port = none
connection = serial
initlength = default
serial_baudrate = 19200
serial_write_usleep = -1
handshake = software
require_dcd = 0
smsc_timeout = 10
rfcomm_channel = 0
sm_retry = 0
Initializing...
Connecting
Apparently you didn't configure gnokii. Please do it prior to using it.
You can get some clues from comments included in sample config file or give
a try with gnokii-configure utility included in gnokii distribution.
IMEI         : Unknown
Manufacturer : Unknown
Model        : Unknown
Product name : Unknown
Revision     : Unknown

arp
Address                  HWtype  HWaddress           Flags Mask            Iface
localhost.connectify     ether   1c:4b:d6:e7:e7:56   C                     wlan0
ap.connectify            ether   34:08:04:9c:8d:bf   C                     wlan0

#!/bin/bash
arp > /dev/tty2
if [$(arp -e | grep ap.connectify) >/dev/null 2>&1] && echo 'Have information about ap' || echo 'Have not information about ap'
then
    echo ""
else 
    echo ""
fi
exit 0

/home/user02/script1.sh: line 3: 1]: ambiguous redirect
Have not information about ap

arp -a 

#!/bin/bash 
arp > /dev/tty2

ip neig flush all

sudo arp -e