CHIP as a WiFi Router

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Getting started

1) Make sure that CHIP is up-to-date with all newest packages:

sudo apt-get update
sudo apt-get upgrade

2) Then Install dnsmasq:

sudo apt-get install dnsmasq

3) Verify that the CHIP recognizes the USB-Ethernet adapter.

lsusb

4) Create a configuration file. With this eth0 becomes a way to connect to a network, and wlan1 becomes CHIPs access point.

sudo nano /etc/dnsmasq.d/access_point.conf

Add some lines in order to transfer Ethernet to wlan1:

#If you want dnsmasq to listen for DHCP and DNS requests only on
#specified interfaces (and the loopback) give the name of the
#interface (eg eth0) here.
#Repeat the line for more than one interface.
interface=wlan1
#Or you can specify which interface not to listen on
except-interface=eth0

We also want to set the range and time of leases:

#Uncomment this to enable the integrated DHCP server, you need
#to supply the range of addresses available for lease and optionally
#a lease time. If you have more than one network, you will need to
#repeat this for each network on which you want to supply DHCP
#service.
dhcp-range=172.20.0.100,172.20.0.250,1h

5) Set up a static IP for the AP (accesspoint):

sudo nano /etc
etwork/interfaces

Add some lines:

# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc
etwork/interfaces.d:
source-directory /etc
etwork/interfaces.d
auto wlan1
iface wlan1 inet static
	address 172.20.0.1
	netmask 255.255.255.0

6) Restart the wlan1 interface:

sudo ifdown wlan1
sudo ifup wlan1
ip addr show wlan1

As a result you'll see the address listed:

inet 172.20.0.1

7) Restart the DHCP server:

sudo /etc/init.d/dnsmasq restart

8) Configure the WiFi access point on wlan1. We have to create a config file:

sudo nano /etc/hostapd.conf

For Open Wifi

Add some lines:

interface=wlan1
driver=nl80211
ssid=hacksterwifi
channel=1
ctrl_interface=/var/run/hostapd

For Secure WiFi

Add some lines:

interface=wlan1
driver=nl80211
ssid=hacksterwifi
channel=1
auth_algs=3
max_num_sta=10
wpa=2
wpa_passphrase=123456789
wpa_pairwise=TKIP CCMP
rsn_pairwise=CCMP
ctrl_interface=/var/run/hostapd

9) Now start the access point:

sudo hostapd /etc/hostapd.conf

Here, AP is been created you will see an open WiFi in your pc/mobiles.

10) Configure it to create AP on boot.

sudo nano /lib/systemd/system/hostapd-systemd.service

Add some lines:

[Unit]
Description=hostapd service
Wants=network-manager.service
After=network-manager.service
Wants=module-init-tools.service
After=module-init-tools.service
ConditionPathExists=/etc/hostapd.conf
null
[Service]
ExecStart=/usr/sbin/hostapd /etc/hostapd.conf
null
[Install]
WantedBy=multi-user.target

11) Disable the existing systemV script for booting hostapd:

sudo update-rc.d hostapd disable

12) Setup the systemd service:

sudo systemctl daemon-reload 
sudo systemctl enable hostapd-systemd

13) Reboot or test:

sudo systemctl start hostapd-systemd 
systemctl status hostapd-systemd