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Thread: Reduce TX Power / Signal Strength

  1. #1
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    Reduce TX Power / Signal Strength

    I appreciate this may be an odd request but i am looking for a way to reduce the signal strength of the WiFi adapter. I have read this post and a couple similar -

    And it seems it's straight forward to increase it so if i use the same commands but reduce power to 10 would that in theory half the signal strength ( presuming 20 is the default ). I am using the USB WiFi device - TP-Link TL-WN722N connected to a RPI 2b.


  2. #2
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    ifconfig wlan0 down
    iwconfig wlan0 txpower 10
    ifconfig wlan0 up

  3. #3
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    ]A 3 dB decrease will be half the power.

    so 17 dB is half the power of 20 dB
     iwconfig wlan0 txpower 17
    wavemon will tell u the power in milliwats
    Last edited by dustyboner; 2016-06-23 at 04:43.

  4. #4
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    Hey everyone,

    I came across this thread as I was looking for the "typical" increase in power.

    Currently nothing I configure via iwconfig works on my virtualBox machine.
    Anyone experienced something similar to this?

    root@kali:~# uname -a
    Linux kali 4.7.0-kali1-amd64 #1 SMP Debian 4.7.6-1kali1 (2016-10-17) x86_64 GNU/Linux
    root@kali:~# iwconfig wlan0mon txpower 17
    root@kali:~# iwconfig
    wlan0mon IEEE 802.11 Mode:Monitor Frequency:2.422 GHz Tx-Power=20 dBm
    Retry short limit:7 RTS thrff Fragment thrff
    Power Managementff

    Thanks, any help is appreciated

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