Add wifi config sample files

SunFounder/SmartVideoCar/README.md

@@ -16,6 +16,7 @@
 5. Now you can ping 192.168.1.10 and hopefully you can connect to it (for the debugging purpose)
 
 # Setup wireless networks
+Run `sudo apt-get install hostapd isc-dhcp-server`
 Run `sudo nano /etc/hostapd/hostapd.conf` and use the following as an example
 ```
 interface=wlan0

SunFounder/SmartVideoCar/files/etc.default.hostapd.patch

@@ -0,0 +1,11 @@
+--- etc/default/hostapd.orig	2017-11-13 12:12:16.060855052 -0600
++++ etc/default/hostapd	2017-11-13 12:12:43.106038459 -0600
+@@ -7,7 +7,7 @@
+ # file and hostapd will be started during system boot. An example configuration
+ # file can be found at /usr/share/doc/hostapd/examples/hostapd.conf.gz
+ #
+-#DAEMON_CONF=""
++DAEMON_CONF="/etc/hostapd/hostapd.conf"
+ 
+ # Additional daemon options to be appended to hostapd command:-
+ # 	-d   show more debug messages (-dd for even more)

SunFounder/SmartVideoCar/files/etc.default.isc-dhcp-server.patch

@@ -0,0 +1,9 @@
+--- etc/default/isc-dhcp-server.orig	2017-11-13 12:14:05.785333905 -0600
++++ etc/default/isc-dhcp-server	2017-11-13 12:14:21.615655554 -0600
+@@ -14,5 +14,5 @@
+ 
+ # On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
+ #	Separate multiple interfaces with spaces, e.g. "eth0 eth1".
+-INTERFACESv4=""
++INTERFACESv4="wlan0"
+ INTERFACESv6=""

SunFounder/SmartVideoCar/files/etc.dhcp.dhcpd.conf.patch

@@ -0,0 +1,25 @@
+--- etc/dhcp/dhcpd.conf.orig	2017-11-13 12:09:52.895262089 -0600
++++ etc/dhcp/dhcpd.conf	2017-11-13 12:10:21.012527807 -0600
+@@ -18,7 +18,7 @@
+ 
+ # If this DHCP server is the official DHCP server for the local
+ # network, the authoritative directive should be uncommented.
+-#authoritative;
++authoritative;
+ 
+ # Use this to send dhcp log messages to a different log file (you also
+ # have to hack syslog.conf to complete the redirection).
+@@ -105,3 +105,13 @@
+ #    range 10.0.29.10 10.0.29.230;
+ #  }
+ #}
++
++subnet 192.168.42.0 netmask 255.255.255.0 {
++ range 192.168.42.10 192.168.42.50;
++ option broadcast-address 192.168.42.255;
++ option routers 192.168.42.1;
++ default-lease-time 600;
++ max-lease-time 7200;
++ option domain-name "local";
++ option domain-name-servers 8.8.8.8, 8.8.4.4;
++}

SunFounder/SmartVideoCar/files/etc.hostapd.dynamicconf.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+serial=$(cat /proc/cpuinfo | grep Serial | md5sum | cut -c 1-4)
+sed -i "s/^ssid=.*$/ssid=Pi_AP-$serial/" /etc/hostapd/hostapd.conf

SunFounder/SmartVideoCar/files/etc.hostapd.hostapd.conf

@@ -0,0 +1,16 @@
+interface=wlan0
+#driver=nl80211
+ssid=Pi_AP-1c54
+country_code=US
+hw_mode=g
+channel=11
+macaddr_acl=0
+auth_algs=1
+ignore_broadcast_ssid=0
+wpa=2
+wpa_passphrase=Raspberry
+wpa_key_mgmt=WPA-PSK
+wpa_pairwise=CCMP
+wpa_group_rekey=86400
+ieee80211n=1
+wme_enabled=1

SunFounder/SmartVideoCar/files/etc.init.d.hostapd.patch

@@ -0,0 +1,11 @@
+--- etc/init.d/hostapd.orig	2017-11-13 12:16:34.849449204 -0600
++++ etc/init.d/hostapd	2017-11-13 12:16:53.695431527 -0600
+@@ -25,6 +25,8 @@
+ [ -s "$DAEMON_DEFS" ] && . /etc/default/hostapd
+ [ -n "$DAEMON_CONF" ] || exit 0
+ 
++/etc/hostapd/dynamicconf.sh
++
+ DAEMON_OPTS="-B -P $PIDFILE $DAEMON_OPTS $DAEMON_CONF"
+ 
+ . /lib/lsb/init-functions

SunFounder/SmartVideoCar/files/etc.network.interfaces.d.wlan0.cfg.patch

@@ -0,0 +1,10 @@
+--- etc/network/interfaces.d/wlan0.cfg.orig	2017-11-13 12:19:11.676636013 -0600
++++ etc/network/interfaces.d/wlan0.cfg	2017-11-13 12:20:35.673604078 -0600
+@@ -1,3 +1,4 @@
+-allow-hotplug wlan0
+-iface wlan0 inet dhcp
+-wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
++auto wlan0
++iface wlan0 inet static
++    address 192.168.42.1
++    netmask 255.255.255.0