pi@raspberrypi:~ $ sudo iwlist wlan0 scan
wlan0 Interface doesn't support scanning : Device or resource busy
pi@raspberrypi:~ $ iwconfig wlan0
wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
pi@raspberrypi:~ $ sudo ifconfig wlan0 up
pi@raspberrypi:~ $ iwconfig wlan0
wlan0 IEEE 802.11abg ESSID:"SQT0091"
Mode:Managed Frequency:2.437 GHz Access Point: 20:54:76:F4:31:B7
Bit Rate=11 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=28/70 Signal level=-82 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
pi@raspberrypi:~ $ iwconfig wlan0
wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
pi@raspberrypi:~ $ sudo ifconfig wlan0 up
pi@raspberrypi:~ $ iwconfig wlan0
wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
pi@raspberrypi:~ $ iwlist scan
wlan0 No scan results
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
pi@raspberrypi:~ $ sudo iwlist wlan0 scan
wlan0 Failed to read scan data : Resource temporarily unavailable
pi@raspberrypi:~ $ lsmod
Module Size Used by
ctr 4001 2
ccm 8278 2
arc4 1972 2
rt73usb 24270 0
rt2x00usb 11918 1 rt73usb
rt2x00lib 47910 2 rt73usb,rt2x00usb
mac80211 622304 2 rt2x00lib,rt2x00usb
cfg80211 499834 2 mac80211,rt2x00lib
rfkill 22491 2 cfg80211
bcm2835_gpiomem 3703 0
snd_bcm2835 22317 0
snd_pcm 92581 1 snd_bcm2835
snd_timer 23454 1 snd_pcm
snd 68161 3 snd_bcm2835,snd_timer,snd_pcm
uio_pdrv_genirq 3690 0
uio 10002 1 uio_pdrv_genirq
ipv6 360374 26
pi@raspberrypi:~ $ ifconfig
eth0 Link encap:Ethernet HWaddr b8:27:eb:67:76:b0
inet addr:192.168.1.5 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::550e:3347:57e:2f06/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9673 errors:0 dropped:49 overruns:0 frame:0
TX packets:521 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:912164 (890.7 KiB) TX bytes:65499 (63.9 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
wlan0 Link encap:Ethernet HWaddr 00:a1:b0:c0:10:01
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:61 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2512 (2.4 KiB) TX bytes:12060 (11.7 KiB)pi@raspberrypi:~ $ dmesg | grep rt2
[ 9.924818] ieee80211 phy0: rt2x00_set_chip: Info - Chipset detected - rt: 2573, rf: 0001, rev: 000a
[ 11.951314] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt73.bin'
[ 11.956621] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 1.7iwconfig wlan0 выше не видно? Если скорость обмена информацией, то не успел проверить.