Raspberry pi wifi熱點(diǎn)續(xù)

上一篇介紹了用raspbery pi做wifi熱點(diǎn)。但是如果我把raspberry pi做成wifi熱點(diǎn)的話無法讓raspberry pi無線連接到家里的wifi連接internet了。所以為了讓raspberry pi既可以作為wifi熱點(diǎn)，也可以在平時(shí)連接家里的wifi連接internet，我這里介紹一個我認(rèn)為比較好用的辦法。

思路是用shell腳本，更改一下raspberry pi的網(wǎng)絡(luò)設(shè)定，執(zhí)行腳本可以更換wifi AP模式和wifi client模式。

首先需要配置/etc/networks/interface文件，

第一個是為普通wifi client模式使用的。

pi@raspberrypi ~ $ cat /etc/network/interfaces.net 

auto lo

iface lo inet loopback

auto eth0

allow-hotplug eth0

iface eth0 inet manual

auto wlan0

allow-hotplug wlan0

iface wlan0 inet manual

wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

pi@raspberrypi ~ $ sudo cat /etc/wpa_supplicant/wpa_supplicant.conf 

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

update_config=1

network={

ssid="SSID"

psk="PASSWORD"

key_mgmt=WPA-PSK

}

再保存一份作為wifi AP模式的配置文件使用

pi@raspberrypi ~ $ cat /etc/network/interfaces.ap

auto lo

iface lo inet loopback

auto eth0

allow-hotplug eth0

iface eth0 inet manual

#auto wlan0

#allow-hotplug wlan0

#iface wlan0 inet manual

#wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

#auto wlan1

#allow-hotplug wlan1

#iface wlan1 inet manual

#wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

allow-hotplug wlan0

iface wlan0 inet static

    address 192.168.20.1

    netmask 255.255.255.0

#up iptables-restore < /etc/network/iptables

分別做成兩個腳本文件，可以執(zhí)行腳本更換模式：

轉(zhuǎn)換成wifi client模式

pi@raspberrypi ~ $ cat ./net.sh 

#!/bin/sh

#net.sh

sudo cp /etc/network/interfaces.net /etc/network/interfaces

sudo /etc/init.d/networking restart

echo "network mode set"

轉(zhuǎn)換成wifi AP模式

pi@raspberrypi ~ $ cat ./ap.sh 

#!/bin/bash

#ap.sh

sudo cp /etc/network/interfaces.ap /etc/network/interfaces

sudo /etc/init.d/networking restart

echo "set to ap mode"

在/etc/rc.local文件最后一行exit 0之前加上一行，使之默認(rèn)啟動為AP模式，這樣在外面沒有顯示器的地方也可以通過手機(jī)或者電腦登陸raspberry pi實(shí)時(shí)更換模式了。

#!/bin/sh -e

#

# rc.local

#

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

#

# In order to enable or disable this script just change the execution

# bits.

#

# By default this script does nothing.

# Print the IP address

_IP=$(hostname -I) || true

if [ "$_IP" ]; then

  printf "My IP address is %s\n" "$_IP"

fi

sudo service hostapd start

sudo cp /etc/network/interfaces.ap /etc/network/interfaces

sh /home/pi/nat.sh

exit 0

這樣，raspberry pi啟動的時(shí)候就是AP模式，在家里可以用腳本轉(zhuǎn)換為普通wifi client模式。