So... I am using android device without RF shielding ( Material which was used for shielding got damaged during repair ( is safe to assume device has 0 shielding )
I'd like to reduce wifi power coming out of the device for some ease of mind... Don't laugh ik... it's low power but still
What idk is how RX TX work and how to use
iw tool to check RX/TX of the device.... Could use some help w this
Anyways since I'm a noob I researched how and first stumbled upon
iwconfig - which doesn't seem to work on my device ( all interfaces give :
no wireless extensions when I type iwconfig into shell of device )
iw works - and with it I can set the txpower in mBm to my desired level
iw wlan0 set txpower limit 700
After running this command I see lower signal on the openwrt realtime graph (from -40 dBm to -60 dBm) Android device reports wifi signal as excellent so I am asuming only openwrt is receiving lower signal which is expected.
.... Since I can set TX power of the device already - should I be concerned about RX power ?
What does RX power mean? Like do the antennas that receive signal use power for this ? ( I know routers have antenas for RX and TX , I am assuming phones have one each as well - so do those antennas emit any signal to the surroundings or just passively sit there and soak in ? )
Or is RX power simply some limit - like disconnect wifi when it falls below this limit?
iw doesn't have option to set RX power otherwise I would have played with it first before asking silly questions