#!/bin/bash
 
R1=`cat /sys/class/net/wlan0/statistics/rx_bytes`
T1=`cat /sys/class/net/wlan0/statistics/tx_bytes`
sleep 1
R2=`cat /sys/class/net/wlan0/statistics/rx_bytes`
T2=`cat /sys/class/net/wlan0/statistics/tx_bytes`
TBPS=`expr $T2 - $T1`
RBPS=`expr $R2 - $R1`
TKBPS=`expr $TBPS / 1024`
RKBPS=`expr $RBPS / 1024`
icon=""
icon1=""
printf "^c#FFFFFF^ %s %s %s %s \\n" "$icon" "$RKBPS kb" "$icon1" "$TKBPS kb"