[Raspberry Pi] WiFi-AP by using Edimax(EW-7811UN)

1. On Raspberry Pi

sudo apt-get install bridge-utils hostapd

2. Because hostapd not compatible with Realtek RTL8188CUS. So change hostapd to suit for RTL8188CUS.

wget http://www.daveconroy.com/wp3/wp-content/uploads/2013/07/hostapd.zip
unzip hostapd.zip
sudo mv /usr/sbin/hostapd /usr/sbin/hostapd.bak
sudo mv hostapd /usr/sbin/hostapd.edimax
sudo ln -sf /usr/sbin/hostapd.edimax /usr/sbin/hostapd
sudo chown root.root /usr/sbin/hostapd
sudo chmod 755 /usr/sbin/hostapd

3. Bridge eth0 and wlan0[1]

sudo nano /etc/network/interfaces

#loopback adapter
auto lo
iface lo inet loopback

#wired adapter
iface eth0 inet dhcp

#bridge
auto br0
iface br0 inet dhcp
bridge_ports eth0 wlan0

4. Configure the configuration of hostapd
sudo nano /etc/hostapd/hostapd.conf

interface=wlan0
driver=rtl871xdrv
bridge=br0
ssid=RaspberryPi
channel=1
wmm_enabled=0
wpa=1
wpa_passphrase=0000011111
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
auth_algs=1
macaddr_acl=0

description :
 wpa_passphrase=0000011111 # password

5. Start your hostapd
hostapd -dd /etc/hostapd/hostapd.conf

Data:
[1]

brctl show
bridge name bridge id  STP enabled interfaces
br0  8000.801f02a6a77f no        eth0
            wlan0

Reference :

1. Turn Your Raspberry Pi Into a WiFi Hotspot with Edimax Nano USB EW-7811Un (RTL8188CUS chipset)