jetson nano でWiFiを使う


jetson nanoのリビジョンは以下の通り。

$ cat /etc/nv_tegra_release 
# R32 (release), REVISION: 7.1, GCID: 29818004, BOARD: t210ref, EABI: aarch64, DATE: Sat Feb 19 17:05:08 UTC 2022


$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 1a40:0801 Terminus Technology Inc. 
Bus 001 Device 004: ID 0bda:0811 Realtek Semiconductor Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/4p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/5p, 480M
    |__ Port 2: Dev 4, If 0, Class=Vendor Specific Class, Driver=rtl8821au, 480M
    |__ Port 3: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M

Realtek Semiconductor Corp.として認識されました。
Driver=rtl8821au となっているのでドライバーもロードされています。



$ nmcli help
Usage: nmcli [OPTIONS] OBJECT { COMMAND | help }

  -t[erse]                                       terse output
  -p[retty]                                      pretty output
  -m[ode] tabular|multiline                      output mode
  -c[olors] auto|yes|no                          whether to use colors in output
  -f[ields] <field1,field2,...>|all|common       specify fields to output
  -g[et-values] <field1,field2,...>|all|common   shortcut for -m tabular -t -f
  -e[scape] yes|no                               escape columns separators in values
  -a[sk]                                         ask for missing parameters
  -s[how-secrets]                                allow displaying passwords
  -w[ait] <seconds>                              set timeout waiting for finishing operations
  -v[ersion]                                     show program version
  -h[elp]                                        print this help

  g[eneral]       NetworkManager's general status and operations
  n[etworking]    overall networking control
  r[adio]         NetworkManager radio switches
  c[onnection]    NetworkManager's connections
  d[evice]        devices managed by NetworkManager
  a[gent]         NetworkManager secret agent or polkit agent
  m[onitor]       monitor NetworkManager changes

$ nmcli d
DEVICE   TYPE      STATE         CONNECTION         
eth0     ethernet  connected     Wired connection 1 
docker0  bridge    connected     docker0            
wlan0    wifi      disconnected  --                 
l4tbr0   bridge    unmanaged     --                 
dummy0   dummy     unmanaged     --                 
rndis0   ethernet  unmanaged     --                 
usb0     ethernet  unmanaged     --                 
lo       loopback  unmanaged     --  



$ nmcli r wifi on
$ nmcli d wifi list
IN-USE  SSID                    MODE   CHAN  RATE        SIGNAL  BARS  SECURITY  
        F660A-S5b9-G            Infra  6     405 Mbit/s  100     ▂▄▆█  WPA1 WPA2 
        F660A-S5b9-A            Infra  36    405 Mbit/s  100     ▂▄▆█  WPA1 WPA2 
        F660T-Avst-A            Infra  60    405 Mbit/s  45      ▂▄__  WPA1 WPA2 
        48E2448B1105-2G         Infra  11    195 Mbit/s  34      ▂▄__  WPA1 WPA2 
        F660T-GzEF-A            Infra  40    405 Mbit/s  29      ▂___  WPA1 WPA2 
        48E2448B1105-5G         Infra  52    405 Mbit/s  29      ▂___  WPA1 WPA2 
        Buffalo-G-EF30          Infra  3     130 Mbit/s  27      ▂___  WPA2


$ sudo nmcli d wifi connect F660A-S5b9-A password XXXXYYYY
Device 'wlan0' successfully activated with 'e471264d-e51a-47f4-aab3-c1cc4205cd48'.


$ iwconfig
wlan0     IEEE 802.11AC  ESSID:"F660A-S5b9-A"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:5.18 GHz  Access Point: 8C:DC:02:47:2B:EE   
          Bit Rate:434 Mb/s   Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=92/100  Signal level=75/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

$ ip a

8: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 04:5f:a7:11:93:82 brd ff:ff:ff:ff:ff:ff
    inet brd scope global dynamic noprefixroute wlan0
       valid_lft 86298sec preferred_lft 86298sec
    inet6 240d:1a:4c5:8c00:78d2:f907:a336:4b60/64 scope global temporary dynamic 
       valid_lft 6822sec preferred_lft 6822sec
    inet6 240d:1a:4c5:8c00:7510:5fb3:e221:f881/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 6822sec preferred_lft 6822sec
    inet6 fe80::19cf:f721:ec5c:b4a3/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever