Googla litt og fant dette for justering av sendestyrke under openWRT: http://wl500g.info/showpost.php?p=25484&postcount=25

[admin@wl root]$ wl -i eth2 txpwr1 -m 84
[admin@wl root]$ wl -i eth2 txpwr1
TxPower is 77 qdbm, 19.25 dbm, 84 mW Override is Off

PS: eth skal endres til eth1 ellers funker det ikke.