#!/bin/sh
case "$(cat /sys/class/net/w*/operstate 2>/dev/null)" in
  down)
    echo "\004  \001"
  ;;
  up)
    ssid="$(iw dev | grep ssid | awk '{print $2}')"
    percent="$(awk '/^\s*w/ { print int($3 * 100 / 70) }' /proc/net/wireless)"
    wifiicon=" "
    [ $percent -le 50 ] && [ $percent -gt 25 ] && color=$(echo '\003') || color=''
    [ $percent -le 25 ] && color=$(echo '\004')
    printf "%s%s%s%s\001" "$wifiicon" "$ssid " $color "($percent%)"
  ;;
esac