wifi-strength.sh

Small shell script to scan for 802.11 AP's or monitor a connected link with text based bar graph. Designed to work with openWrt

Script Dependency: B(ASH) like shell and iw. No other package requirements. Must be run as user root or sudo. The iw scan command requires root access.

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Help

./wifi-strength.sh -h

Usage

Usage: wifi-strength.sh [options] <interface>

<interface>  The interface to monitor. 

[options]
  -m	Monitor link signal strength.
  -n	Display x number of lines
  -i	Set scan interval, default 5 seconds
  -l	Length of strength bar, range 1-100, Default 50
  -a	Active scan, default passive scan. (Active scan sends Beacon's) 
  -f	Filter results, use extended grep pattern. Example: -f 'Whispering|MESH'

Example:
  Scan for "masters" on interface wlan1;

	wifi-strength.sh wlp4s0

  Scan AP's on wlan1 set strength bar length to 10;

	wifi-strength.sh -l 10 wlp4s0

  Monitor client connection on interface wlan1

	wifi-strength.sh -m wlp4s0


Interfaces found:
wlp4s0

Example: Scan AP's on interface wlp4s0;

wifi-strength.sh wlp4s0

Scan AP's on interface wlp4s0 and set strength bar length to 10 and filter on Whisp and MESH;

wifi-strength.sh -l 10 -f 'Whisp|MESH' wlp4s0

Monitor station connection on interface wlp4s0 (connected to another AP)

wifi-strength.sh -m wlp4s0

Filter output using regex, example of filtering on anything that contains Whisp or MESH case sensitive.

wifi-strength.sh -f 'Whisp|MESH' wlp4s0