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en:minimal_image_wifi_setup [2017/02/20 17:40]
mdrjr created
en:minimal_image_wifi_setup [2017/05/17 13:33]
odroid
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-empty+====== Configure Wireless using wpa_supplicant for Odroid minimal image ====== 
 + 
 +Find the wireless card Interface name. 
 + 
 +<​code>#​ iwconfig 
 +sit0      no wireless extensions. 
 + 
 +lo        no wireless extensions. 
 + 
 +eth0      no wireless extensions. 
 + 
 +ip6tnl0 ​  no wireless extensions. 
 + 
 +wlx40a5efd52a6d ​ unassociated ​ Nickname:"<​WIFI@REALTEK>"​ 
 +          Mode:​Auto ​ Frequency=2.412 GHz  Access Point: Not-Associated 
 +          Sensitivity:​0/​0 
 +          Retry:​off ​  RTS thr:​off ​  ​Fragment thr:off 
 +          Encryption key:off 
 +          Power Management:​off 
 +          Link Quality=0/​100 ​ Signal level=0 dBm  Noise level=0 dBm 
 +          Rx invalid nwid:​0 ​ Rx invalid crypt:​0 ​ Rx invalid frag:0 
 +          Tx excessive retries:​0 ​ Invalid misc:​0 ​  ​Missed beacon:​0</​code>​ 
 + 
 +Need to append the **net.ifnames=0** to **bootargs** ​ in **/​media/​boot/​boot.ini** to change the interface name to wlan0. 
 + 
 + 
 +Following are the steps to Create wireless service to connect to your router. 
 + 
 +**Step1 : Find SSID to connect.** 
 +<​code>​ 
 +# sudo iwlist wlan0 scanning | egrep 'Cell |Encryption|Quality|Last beacon|ESSID'​ 
 +          Cell 01 - Address: 5E:​CF:​7F:​84:​54:​70 
 +                    ESSID:"​smartpower2"​ 
 +                    Encryption key:on 
 +                    Quality=0/​100 ​ Signal level=-45 dBm 
 +          Cell 02 - Address: 5E:​CF:​7F:​13:​91:​D6 
 +                    ESSID:"​smartpower2"​ 
 +                    Encryption key:on 
 +                    Quality=0/​100 ​ Signal level=-45 dBm 
 +          Cell 03 - Address: 2C:​30:​33:​5E:​8C:​9D 
 +                    ESSID:"​MYSSID"​ 
 +                    Encryption key:on 
 +                    Quality=0/​100 ​ Signal level=-45 dBm 
 +          Cell 04 - Address: 2C:​30:​33:​5E:​8C:​9C 
 +                    ESSID:"​GoToHell-5G"​ 
 +                    Encryption key:on 
 +                    Quality=0/​100 ​ Signal level=-45 dBm 
 +</​code>​ 
 + 
 +**Step2: Generate wireless wpa_supplicant configuration file** 
 + 
 +This connection method allows quickly connecting to a network whose SSID is already known 
 + 
 +<​code>#​ wpa_passphrase MY_SSID MY_PASSWORD > /​etc/​wpa_supplicant/​wpa_supplicant.conf</​code>​ 
 + 
 +Replace **MY_SSID** with the actual network name, and replace **MY_PASSWORD** with the actual security key for the network.  
 + 
 +**Step3: Create Wireless Service file. /​etc/​systemd/​system/​network-wireless@.service** 
 +Append the following to the service file 
 + 
 +<​code>​ 
 +[Unit] 
 +Description=Wireless network connectivity (%i) 
 +Wants=network.target 
 +Before=network.target 
 +BindsTo=sys-subsystem-net-devices-%i.device 
 +After=sys-subsystem-net-devices-%i.device 
 + 
 +[Service] 
 +Type=oneshot 
 +RemainAfterExit=yes 
 + 
 +ExecStart=/​sbin/​ip link set dev %i up 
 +ExecStart=/​sbin/​wpa_supplicant -B -i %i -c /​etc/​wpa_supplicant/​wpa_supplicant.conf 
 +ExecStart=/​sbin/​dhclient %i 
 + 
 +ExecStop=/​sbin/​ip link set dev %i down 
 + 
 +[Install] 
 +WantedBy=multi-user.target 
 +</​code>​ 
 + 
 +Note: depend on you setting in your image you need to update the absolute patch for **ip, wpa_supplicant** and **dhclient** command 
 + 
 +**Step4 : Need to Create Symbolic link to update the service.** 
 + 
 +<​code>#​ ln -s /​etc/​systemd/​system/​network-wireless@.service /​etc/​systemd/​system/​multi-user.target.wants/​network-wireless@wlan0.service</​code>​ 
 + 
 +**Step5 : Enable the service.** 
 + 
 +<​code>#​ systemctl enable network-wireless@wlan0.service</​code>​ 
 + 
 +**Step6: ​ Reload the all the serivce**  
 + 
 +<​code>#​ systemctl daemon-reload</​code>​ 
 +** 
 +Step7: Start the systemctrl service**  
 + 
 +<​code>#​ systemctl start network-wireless@wlan0.service</​code>​ 
 + 
 +**After this we will get ip address from the router.** 
 + 
 +<​code>#​ ifconfig 
 +eth0      Link encap:​Ethernet ​ HWaddr 00:​1e:​06:​10:​dc:​ad 
 +          inet addr:​10.0.0.138 ​ Bcast:​10.0.0.255 ​ Mask:​255.255.255.0 
 +          inet6 addr: fe80::​21e:​6ff:​fe10:​dcad/​64 Scope:​Link 
 +          inet6 addr: 2002:​ac10:​e33c:​e472:​21e:​6ff:​fe10:​dcad/​64 Scope:​Global 
 +          UP BROADCAST RUNNING MULTICAST ​ MTU:​1500 ​ Metric:1 
 +          RX packets:​6808 errors:0 dropped:0 overruns:0 frame:0 
 +          TX packets:​3519 errors:0 dropped:0 overruns:0 carrier:0 
 +          collisions:​0 txqueuelen:​1000 
 +          RX bytes:​7876906 (7.8 MB)  TX bytes:​298180 (298.1 KB) 
 +          Interrupt:​40 
 + 
 +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:160 errors:0 dropped:0 overruns:0 frame:0 
 +          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0 
 +          collisions:​0 txqueuelen:​0 
 +          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB) 
 + 
 +wlan0     Link encap:​Ethernet ​ HWaddr 40:​a5:​ef:​d5:​2a:​6d 
 +          inet addr:​10.0.0.111 ​ Bcast:​10.0.0.255 ​ Mask:​255.255.255.0 
 +          inet6 addr: 2002:​ac10:​e33c:​e472:​42a5:​efff:​fed5:​2a6d/​64 Scope:​Global 
 +          inet6 addr: 2002:​ac10:​e33c:​e472:​c056:​d96b:​b7f9:​4425/​64 Scope:​Global 
 +          inet6 addr: fe80::​42a5:​efff:​fed5:​2a6d/​64 Scope:​Link 
 +          UP BROADCAST RUNNING MULTICAST ​ MTU:​1500 ​ Metric:1 
 +          RX packets:13 errors:0 dropped:0 overruns:0 frame:0 
 +          TX packets:10 errors:0 dropped:1 overruns:0 carrier:0 
 +          collisions:​0 txqueuelen:​1000 
 +          RX bytes:2830 (2.8 KB)  TX bytes:1700 (1.7 KB)</​code>​ 
en/minimal_image_wifi_setup.txt · Last modified: 2017/05/17 13:33 by odroid
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