华为ME909s"/>
树莓派使用4G模块（华为ME909s
大部分树莓派用户使用raspbian系统和ubuntu mate系统，所以我只在这两个系统上尝试使用4G模块，模块使用Mini PCI-E转USB开发板，接入到树莓派上，配置网络方法具体如下：
本篇介绍raspbian系统，ubuntu mate系统将在下一篇介绍
4G模块能直接被系统识别，无需安装驱动，可以通过lsusb和ifconfig命令查看状况：
pi@pi-desktop:~$ lsusb
Bus 001 Device 007: ID 12d1:15c1 Huawei Technologies Co., Ltd.
Bus 001 Device 006: ID 0a05:7211 Unknown Manufacturer hub
Bus 001 Device 005: ID 413c:2107 Dell Computer Corp.
Bus 001 Device 004: ID 413c:301a Dell Computer Corp.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
pi@pi-desktop:~$ ifconfig
enxb827ebdc8c6f Link encap:Ethernet HWaddr b8:27:eb:dc:8c:6f
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::ca29:cc82:f9d1:dd9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:44427 errors:0 dropped:0 overruns:0 frame:0
TX packets:1460 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2462495 (2.4 MB) TX bytes:134180 (134.1 KB)
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:475 errors:0 dropped:0 overruns:0 frame:0
TX packets:475 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:33987 (33.9 KB) TX bytes:33987 (33.9 KB)
usb0 Link encap:Ethernet HWaddr 02:1e:10:1f:00:00
inet addr:10.27.145.51 Bcast:10.27.145.55 Mask:255.255.255.248
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:63 errors:0 dropped:0 overruns:0 frame:0
TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13037 (13.0 KB) TX bytes:12466 (12.4 KB)
wlan0 Link encap:Ethernet HWaddr b8:27:eb:89:d9:3a
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:242 errors:0 dropped:242 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:85717 (85.7 KB) TX bytes:0 (0.0 B)
在raspbian系统下使用wvdial来拨号连接4G网络
安装wvdial：
sudo apt-get install wvdial
配置连接信息：
sudo vi /etc/wvdial.conf
如下配置：
[Dialer hw1]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0
Init3 = AT+CGDCONT=1,"IP","3gnet"
Modem Type = Analog Modem
Baud = 9600 # 波特率常见的是9600 115200 460800
New PPPD = yes
Modem = /dev/ttyUSB0
ISDN = 0
Phone = *99#
Password = guest
Username = guest
Auto DNS = on
拨号上网：
sudo wvdial hw1
需要等待一会儿
此时可以通过ifconfig看到多出了个ppp0的网卡设备，并且已经获得IP地址
但是还是无法ping通外网，查看路由表信息如下：
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 eth0
10.64.64.64 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 202 0 0 eth0
可以看出访问未知目标时，使用的是eth0的网卡，此处我们将其修改为使用ppp0来访问未知目标：
删除eth0的第一条路由信息：
sudo route del –net 0.0.0.0 eth0
新增一条ppp0的路由信息：
sudo route add –net 0.0.0.0 ppp0
修改后路由信息为：
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0
10.64.64.64 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 202 0 0 eth0
可以尝试ping内网和外网：
pi@raspberrypi:~ $ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.522 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.470 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.402 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.449 ms
pi@raspberrypi:~ $ ping www.baidu
PING www.a.shifen (61.135.169.125) 56(84) bytes of data.
64 bytes from 61.135.169.125: icmp_seq=1 ttl=54 time=23.3 ms
64 bytes from 61.135.169.125: icmp_seq=2 ttl=54 time=27.0 ms
64 bytes from 61.135.169.125: icmp_seq=3 ttl=54 time=13.5 ms
64 bytes from 61.135.169.125: icmp_seq=4 ttl=54 time=23.1 ms
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树莓派使用4G模块（华为ME909s
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