Changing transmission power of 802.11 wireless cards

Pre-requisites:

1. Linux with hostap driver
2. 802.11 wireless card

Commands:

1. To control automatic controlling of transmission power ‘/sbin/iwpriv wlan0 prism2_param 5 X’ , where X = 0 for disabling and 1 for enabling
2. To read the current value of the transmission power ‘/sbin/iwpriv wlan0 readmif 62’
3. To change the current value of the transmission power ‘/sbin/iwpriv wlan0 prism2_param 6 Y’ , where 0 <= Y <= 255

(value for min power level = 127 , value for max power level = 128) If that command does not work, use ‘/sbin/iwpriv wlan0 writemif 62 Y’ command.