Bringing Wi-Fi Access Point Feature on your embedded board running GNU/Linux

Before reading through this article, to build and install GNU/Linux on embedded board, read through this link.

To bring WiFi client feature on your embedded board, read through this link.
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Follow these simple steps below to bring your board as AP.
  1. Install necessary tools
    Install hostapd and dnsmasq necessary for an Access Point.
    # apt-get install hostapd dnsmasq --no-install-recommends
  2. Configure network interface
    Add or modify /etc/network/interface to contain the following.
    # cat /etc/network/interface
    auto lo wlan0
    iface lo inet loopback
    allow-hotplug eth0
    iface eth0 inet dhcp
    
    iface wlan0 inet static
    address 192.168.1.1
    network 192.168.1.0
    netmask 255.255.255.0
    allow-hotplug wlan0
    The above file says how our system get connected through eth0, wlan0 and lo. Check man page of interfaces for more details.
  3. Configure hostapd
    # cat /etc/default/hostapd
    DAEMON_CONF="/etc/hostapd/hostapd.conf"
    DAEMON_OPTS="-dd"
    # cat /etc/hostapd/hostapd.conf
    interface=wlan0
    driver=nl80211
    ssid=zilogic
    channel=1
  4. Configure dnsmasq with Client IP range
    # cat /etc/dnsmasq.conf
    
    interface=wlan0
    dhcp-range=192.168.1.10,192.168.1.100,12h
    dhcp-option=3,192.168.1.1
  5. Start hostapd and dnsmasq services.
    # service hostapd start
    # service dnsmasq start

Note: Now, you can try Raspberry Pi 3 that comes with WiFi and Bluetooth on-board for IoT applications.

More Reading

  1. What is the significance of firmware-atheros package?
  2. What is the significance of wireless-tools utility?
  3. What is iw and iwconfig? How do they differ?
  4. What is wpa_supplicant? How to connect to an encrypted connection?
  5. What is Wireless Extensions(WE)?
  6. What are nl80211 and cfg80211 and how do they differ from WE?
  7. What is Bridging in network connections? 

Disclaimer:
The above article doesn't give you any guarantee and the sole purpose of this article is to share my learning in the way I understood. Any comments to refine this article are welcome with great pleasure. Please report any breaking link by commenting below.

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