RaspberryPi : set WiFi network without a monitor

 

    朋友又拿来个RaspberryPi, 用来换走配置了BMP085测温传感器的另外一个, 而新的这个要用来调试Element14.com的摄像头.

    因而下载Raspbain, image到SD卡上, 再搬出朋友拿来的显示器来配WIFI...不对, 干吗还要用显示器呢...

    上次用显示器, 按照'标准流程'配置了WIFI, 非常麻烦(视频线很差找啊..), 后来某天拿着Pi上下翻转时(专业动做, 请勿模仿), 忽然发现 -- RaspberryPi上不是还有个标准的Ethernet接口吗?!

    因此呢, 无显示状况下配置RaspberryPi的WiFi实际很简单 -- 经过有线网络, 配置无线网络.

    首先(你要有个妹子) 找根网线, 把RaspberryPi链接到路由器上, 再经过路由器配置页面得到其有线网卡的IP地址. 有了这个IP就能够SSH到RaspberryPi上配置其无线WiFi了. 过程以下:

    1. 得到有线网卡的IP地址

     RaspberryPi的Host名称就是raspberrypi, 好认又好记啊..

 

    2.  经过SSH登陆RaspberryPi

    RaspberryPi的缺省用户名/密码是pi/raspberry, 同样好认又好记啊.. 默认只能用SSH登陆, 传统的Telnet是不支持的.

    3. 检查当前RaspberryPi网络配置

    经过ifconfig命令能够看出无线网络已经配置了, 只是没有被分配地址

pi@raspberrypi:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr b8:27:eb:10:70:cf 
          inet addr:192.168.1.106  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:579 errors:0 dropped:0 overruns:0 frame:0
          TX packets:247 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:85440 (83.4 KiB)  TX bytes:32266 (31.5 KiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  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 e8:4e:06:13:0c:50 
          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 (0.0 B)  TX bytes:0 (0.0 B)

    经过查看interfaces文件也能看到无线网卡是配置好的

pi@raspberrypi:~$ cat /etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

 

    查看相对应的无线配置文件, 可用发现没有可用的network被配置

pi@raspberrypi:~$ sudo cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

 

    4. 配置无线网络参数

    因此呢, 加上相似下面的无线网络参加就行了. 具体的无线网络环境配置参数会有所不一样, 那可能就须要参看其它文档了.

pi@raspberrypi:~$ sudo cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="Jie's"
    psk="Helloworld?"
    proto=RSN
    key_mgmt=WPA-PSK
    pairwise=CCMP
    auth_alg=OPEN
}

 

    OK, reboot后, 咱们再看RaspberryPi的网络, 无线配好了, 那么拔掉网线, 玩去吧....

pi@raspberrypi:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr b8:27:eb:10:70:cf 
          inet addr:192.168.1.106  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:92 errors:0 dropped:1 overruns:0 frame:0
          TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:12649 (12.3 KiB)  TX bytes:10894 (10.6 KiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1104 (1.0 KiB)  TX bytes:1104 (1.0 KiB)

wlan0     Link encap:Ethernet  HWaddr e8:4e:06:13:0c:50            inet addr:192.168.1.102  Bcast:192.168.1.255  Mask:255.255.255.0           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:71 errors:0 dropped:77 overruns:0 frame:0           TX packets:5 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000           RX bytes:15377 (15.0 KiB)  TX bytes:1398 (1.3 KiB)