wifi信號增強器，調試wifi簡單記錄

##手動加載usb wifi驅動
加載驅動
insmod /system/8812au.v2.ko
啟動wlan0
busybox ifconfig wlan0 up
禁用wlan0
busybox ifconfig wlan0 down
卸載驅動
rmmod 8812au
###注意事項
啟動wlan0之前可以先使用ifconfig -a wlan0查看wlan0 節點是否存在，
127|rk3399_mid:/ # ifconfig -a wlan0
wlan0 Link encap:Ethernet HWaddr d4:b7:61:9f:3a:3c
UP BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 TX bytes:0
若不存在，則需先啟動p2p_supp_rtl服務創建wlan0節點
開啟p2p_supp_rtl服務
setprop ctl.start p2p_supp_rtl
關閉p2p_supp_rtl服務
setprop ctl.stop p2p_supp_rtl
p2p_supp_rtl服務不支持命令開啟
usbwifi開啟后連接網絡，需要wpa_supplicant服務支持
開啟wpa_supplicant服務
setprop ctl.start wpa_supplicant
關閉wpa_supplicant服務
setprop ctl.stop wpa_supplicant
wpa_supplicant服務可以使用命令開啟
查找wpa_supplicant服務
service wpa_supplicant /system/bin/wpa_supplicant
-iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf
-I/system/etc/wifi/wpa_supplicant_overlay.conf
-e/data/misc/wifi/entropy.bin -O/data/misc/wifi/sockets
-g@android:wpa_wlan0
輸入命令開啟wpa_supplicant服務
/system/bin/wpa_supplicant -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf -I/system/etc/wifi/wpa_supplicant_overlay.conf -e/data/misc/wifi/entropy.bin -O/data/misc/wifi/sockets -g@android:wpa_wlan0 -dd
-dd 使用logcat查看時打開與wpa_supplicant運行時輸出的log
例如：
logcat -c
./wpa_supplicant
logcat 只查看與wpa_supplicant運行時的log
###iw命令的簡單使用
掃描wifi并打印出掃描到wifi的SSID
iw dev wlan0 scan |grep “SSID:” -i
連接wifi xmzw
iw wlan0 connect xmzw
###wpa_cli命令使用
打開debuglog
wpa_cli -iwlan0 -p/data/misc/wifi/sockets log_level debug
掃描AP
wpa_cli -iwlan0 scan
顯示掃描結果
wpa_cli -iwlan0 scan_result
例：rk3399_mid:/ # wpa_cli -iwlan0 scan
OK
rk3399_mid:/ # wpa_cli -iwlan0 scan_results
bssid / frequency / signal level / flags / ssid
10:7b:44:79:46:b4 5745 -61 [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS] A5
70:62:b8:84:a0:90 2417 -61 [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] D-Link_DIR-612
10:7b:44:c0🇩🇪82 2437 -48 [WPA2-PSK-CCMP][ESS] dd-wrt_2.4G
f0:92:b4:76:84:19 2412 -55 [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS] ChinaNet-Jamg
b0:95:8e:b8:64:13 2462 -57 [WPA-PSK-CCMP][WPA2-PSK-CCMP][ESS] TP-LINK blue
f0:92:b4:76:aa:51 2412 -54 [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS] ChinaNet-GSsw
20:76:93:3a:b0:70 2437 -64 [WPA2-PSK-CCMP][ESS] newifi_2.4G_test
70:af:6a:48:a2:73 2437 -65 [WPA-PSK-CCMP][WPA2-PSK-CCMP][ESS] cpf
ec:88:8f:75:3f:e2 2437 -66 [WPA-PSK-CCMP+TKIP][WPS][ESS] db4iot
14:75:90:79:89:0f 2462 -66 [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] CP_2.4G
88:70:22:00:6e:c4 2452 -67 [WPA2-PSK-CCMP][ESS] OrayBox-6-yanfa
24:05:0f:79:48:da 2437 -72 [WPA-PSK-CCMP][WPA2-PSK-CCMP][ESS] cccc
20:76:93:3a:b0:72 5745 -67 [WPA2-PSK-CCMP][ESS] newifi_5G_test
00:24:d2:c6:74:b7 2412 -66 [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS] WWW
00:26:75:01:ba:09 2412 -78 [WPA2-PSK-CCMP][ESS] LBWiFi410
b0:39:56:66:a2:b3 2412 -67 [WPA2-PSK-CCMP][WPS][ESS] weimob–sz
54:e0:61:21:42:d9 2447 -71 [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS] ChinaNet-dEPG
cc:08:fb:7e:6c:0d 2462 -76 [WPA-PSK-CCMP][WPA2-PSK-CCMP][ESS] TP-LINK_6C0D
10:7b:44:c0🇩🇪84 5180 -79 [WPA2-PSK-CCMP][ESS] dd-wrt_5G
列出當前聯網狀態：
rk3399_mid:/ # wpa_cli -iwlan0 status
bssid=10:7b:44:c0🇩🇪84
freq=5180
ssid=dd-wrt_5G
id=1
id_str=%7B%22creatorUid%22%3A%221000%22%2C%22configKey%22%3A%22%5C%22dd-wrt_5G%5C%22WPA_PSK%22%7D
mode=station
pairwise_cipher=CCMP
group_cipher=CCMP
key_mgmt=WPA2-PSK
wpa_state=COMPLETED
ip_address=192.168.50.117
p2p_device_address=d6:b7:61:9f:3a:3c
address=d4:b7:61:9f:3a:3c
uuid=6f47db9a-277a-56db-b7bf-dc203c2a9905
列出所有備選網絡
rk3399_mid:/ # wpa_cli -iwlan0 list_networks
network id / ssid / bssid / flags
0 dd-wrt_2.4G any [DISABLED][TEMP-DISABLED]
1 dd-wrt_5G any [CURRENT]
增加一個備選網絡
rk3399_mid:/ # wpa_cli -iwlan0 add_network
2
設置要連接的網絡名稱
rk3399_mid:/ # wpa_cli -iwlan0 set_network 2 ssid ‘“dd-wrt_5G”’
OK
設置要連接網絡的密碼
rk3399_mid:/ # wpa_cli -iwlan0 set_network 2 psk ‘“12341234”’
OK
啟用網絡，當掃描到啟用網絡是會自動連接
rk3399_mid:/ # wpa_cli -iwlan0 enable_network 2
OK
禁用網絡
rk3399_mid:/ # wpa_cli -iwlan0 disable_network 2
OK
保存配置：
rk3399_mid:/ # wpa_cli -iwlan0 save_config
OK