Alfa TX Power Script

[Scamentology]

This script will change the TX value of your Alfa Card
Some still seem to be struggling with the Alfa (RTL8187) Card
This is part of my network connect script but thought you might find it useful

put this code in a whatever.sh file
chmod +x
change the tx value to whatever you want ( I AM NOT RESPONSIBLE IF YOU BREAK YOUR CARD!!!! I don't set it above 30 myself)
run script

Max TX Value with this script is 30!

#!/bin/bash
set -x
#  (C)opyright 2010 Scamentology
# This Script changes the TX Power for the Alfa Wireless card

    txpower_up="yes"                             # Raises TX Power for alfa Adapters
 txpower_value="30"                              # Value to raise alfa adapter to
     interface="$(airmon-ng | grep "RTL8187" | awk '{print $1}')"  # "eth0" "wlan0" "wlan1"

#__ Nothing To Change Below This Line _____________________________________________________________

#__ TX Power Increase for Alfa ____________________________________________________________________
if [ ! $interface ] ; then echo "Alfa Card Not Found" ; /usr/bin/notify-send "Alfa Card Not Found" ; exit 0 ; fi
ifconfig $interface down
ifconfig $interface up
sleep 3
if [ $txpower_up == "yes" ] ; then
   alfa="$(airmon-ng | grep "RTL8187" | awk '{print $1}')"
   if [ "$alfa" == "$interface" ] ; then
      tx_status="$(iwconfig $interface | grep "Tx-Power" | awk '{print $4}')"
      if [ "$tx_status" == "Not-Associated" ] ; then tx_status="$(iwconfig $interface | grep "Tx-Power" | awk '{print $5}')" ; fi
      if [ "$tx_status" == "Tx-Power=$txpower_value" ] ; then
         /usr/bin/notify-send "$tx_status"
      else 
         iw reg set BO
         iwconfig $interface TxPower $txpower_value
         tx_status="$(iwconfig $interface | grep "Tx-Power" | awk '{print $4}')"
         if [ "$tx_status" == "Not-Associated" ] ; then tx_status="$(iwconfig $interface | grep "Tx-Power" | awk '{print $5}')" ; fi
         if [ "$tx_status" == "Tx-Power=$txpower_value" ] ; then
            /usr/bin/notify-send "$tx_status"
         fi
      fi
   fi
fi

exit 0

[MartinBishop]

what does that mean " your network connect script " ? is it possible to change the script in the way, that i can let it run everytime i logon, even when i dont want to use my alfa, but when i plug it in, its able to TX with the power ive set in your scriipt ?

when i plugin my alfa usb, something happens obviously in the background to get it running, wouldnt it be smart to connect the scripts which starts when i plug-in the alfa with your script ? is this possible ?

[Scamentology]

How does It work for you?

I wrote a script for connecting to the network without having to open WICD. This allows me to just click one button to log on. I may post it at some point if there is any interest in it.
to get it to run just add the script to your .bash_profile file.
you could get it to autorun the script. Hmmm - that actually sounds like a good idea.

what does that mean " your network connect script " ? is it possible to change the script in the way, that i can let it run everytime i logon, even when i dont want to use my alfa, but when i plug it in, its able to TX with the power ive set in your scriipt ?

when i plugin my alfa usb, something happens obviously in the background to get it running, wouldnt it be smart to connect the scripts which starts when i plug-in the alfa with your script ? is this possible ?

[MartinBishop]

to get it to run just add the script to your .bash_profile file.

when ive not connected the awus to my notebook and run the script, its worthless i guess ? or did this script set the parameters and if i later on plugin my alfa i have the +++power ?

[bmw222000]

hi thankyou for the scrip but when i run it all i get is

root@bt:~# sh alfa
Error for wireless request "Set Tx Power" (8B26) :
SET failed on device wlan0 ; Invalid argument.
any idea's?

[bmw222000]

sorted that problem with a reboot thankyou

[Scamentology]

I don't think you can change the values of a device that doesn't exist on the system.
I assume it works when your card is plugged in.

when ive not connected the awus to my notebook and run the script, its worthless i guess ? or did this script set the parameters and if i later on plugin my alfa i have the +++power ?

[TheFlyingDutchMan]

Indeed , this script won't get past 30 dBm. I have the same script in about 5 lines of code, made myself.
I guess your script is ok, but I think you have to be more precize what you are offering. This is spoken about in another thread here.

The best ,
tfdm

[Scamentology]

To everyone else - I updated the script in the OP

@flyingductman
Well then this script is not for you. I would bet that your script doesn't handle ANY errors.

What are you talking about "precize" This script changes your tx power how much more "presize" should I get?

I put this up because someone might find it useful. If you don't understand the script then don't use it.

Indeed , this script won't get past 30 dBm. I have the same script in about 5 lines of code, made myself.
I guess your script is ok, but I think you have to be more precize what you are offering. This is spoken about in another thread here.

The best ,
tfdm

[bmw222000]

Well I think this is a good script and I thankyou for it! It does exactilly what you say it does!