Cannot change the txpower, help!

[glynjackson]

Trying to setup the following...

iw reg set BO
ifconfig wlan0 down
iwconfig wlan0 txpower 27dbm
ifconfig wlan0 up

However, on doing iwconfig wlan0 I still show Tx-Power=18 dBm ...

wlan0     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=18 dBm   
          RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off

Have I missed something?

Thanks.

> cat /etc/config/wireless

config wifi-device 'radio0'
option type 'mac80211'
option hwmode '11ng'
option macaddr '00:13:37:a5:28:28'
option htmode 'HT20'
list ht_capab 'SHORT-GI-20'
list ht_capab 'SHORT-GI-40'
list ht_capab 'RX-STBC1'
list ht_capab 'DSSS_CCK-40'
option channel '14'

config wifi-iface
option device 'radio0'
option network 'lan'
option mode 'ap'
option encryption 'none'
option ssid 'BTHub01-Pine'

config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11g'
option macaddr '00:13:37:93:50:22'
option channel '10'

config wifi-iface
option device 'radio1'
option mode 'sta'
option encryption 'psk2+ccmp'
option ssid 'IamUnderYourBed'
option network 'wan'
option key 'xxxxx'

config wifi-device 'radio2'
option type 'mac80211'
option hwmode '11ng'
option macaddr '00:c0:ca:83:18:6d'
option htmode 'HT20'
list ht_capab 'GF'
list ht_capab 'SHORT-GI-20'
list ht_capab 'SHORT-GI-40'
list ht_capab 'RX-STBC1'
option channel '9'

config wifi-iface
option device 'radio2'
option mode 'sta'
ETC

[Armaal]

[wlan0 - AR9331 - 18dbm]-----------> don't support more than 18dbm. Is the hardware limit (limited by the eeprom itself)

--

Specs (AR9331) from datasheet

Edited October 3, 2014 by Armaal

[glynjackson]

I see, cool. @Armaal so I guess I can still add a 15 dBi Antenna on the other side and get better output

[Armaal]

Yes & No.
Why ? That depend what really you wanted to do :

A 2 dbi omni antenna (like the default antenna of PineApple) have a big donuts radiation (in 3D space) -> Nice for short distance & spreading around you in 360°
A 7 dbi omni antenna have also a donuts radiation but more like a flattened donut -> Not really a perfect 360°
A 15 dbi directivity antenna it's very focused radiation (like a fire flaws out of a gun) in one way also spread some radiation around herself -> So here you point direct to your target to have the best signal.

You have Yagi also..(directivity)

(for good antenna brand I recommand Itelite) (I use it for my Bainshee Pad)

Before to act in a field use this following minds :

#1 Whats type of target i'm going to have ? (many peoples (like airports)? cyber cofee (little surface)? one-shoot (single person)?)
#2 Choose the approriate antenna with the choice 1 (example : single person = directionnal & airports are going to work perfectly with omni)


Also you can increase the gain (boost) with Pro stuff (like Hawking technology USA) (be careful with the law @ FCC ) wikipedia that to know the EIRP limits of your country))

Armaal

Edited October 4, 2014 by Armaal