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hostapd WiFi setup for Interceptor driver

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Tom Keffer edited this page Feb 14, 2024 · 15 revisions

Note... This works for any debian based system

  • Debian
  • Ubuntu
  • Kubuntu
  • Raspberry Pi (Raspbian) or other Raspberry Pi debian OS

Prerequisites

weewx-interceptor

    1. download the interceptor driver

wget -O weewx-interceptor.zip https://github.com/matthewwall/weewx-interceptor/archive/master.zip

    1. install the driver

sudo weectl extension install weewx-interceptor-master.zip

The 'sniff' mode requires installation of the pypcap or pylibpcap module, each
of which in turn depends on libpcap.  Install the pcap dependencies using pip:

  sudo pip install pypcap

or using apt-get on debian systems:

  sudo apt-get install python-libpcap

NOTE !! DO NOT INSTALL BIND9 !!
If you do have it installed remove it FIRST

systemctl stop bind9
apt remove bind9

install hostapd
install dnsmasq

systemctl stop dnsmasq
systemctl stop hostapd

Edit /etc/dhcpcd.conf
and edit the first 4 lines below for your
NETWORK ROUTER static IP

interface eth0
static ip_address=192.168.0.4/255.255.255.0
static routers=192.168.0.1
static domain_name_server=8.8.8.8 8.8.4.4

# Defaults from Raspberry Pi configuration
hostname
clientid
persistent
option rapid_commit
option domain_name_servers, domain_name, domain_search, host_name

option classless_static_routes
option ntp_servers
require dhcp_server_identifier
slaac private
nohook lookup-hostname

# RaspAP-WebGui wireless configuration
interface wlan0
static ip_address=10.3.141.1/24
static routers=10.3.141.1
static domain_name_servers=1.1.1.1 8.8.8.8

mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig

Edit /etc/dnsmasq.conf

domain-needed
interface=wlan0
dhcp-range=10.3.141.50,10.3.141.255,255.255.255.0,12h

Edit /etc/hostapd/hostapd.conf

  1. Edit for your AP ssid name ssid=YOUR-AP-NAME
  2. Make sure you edit wpa_passphrase wpa_passphrase=WIFI-PASSWORD 
interface=wlan0
driver=nl80211
ssid=raspi-webgui
hw_mode=g
channel=1
wmm_enabled=0
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=WIFI-PASSWORD
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

Edit /etc/default/hostapd

# Defaults for hostapd initscript
#
# See /usr/share/doc/hostapd/README.Debian for information about alternative
# methods of managing hostapd.
#
# Uncomment and set DAEMON_CONF to the absolute path of a hostapd configuration
# 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)
#       -K   include key data in debug messages
#       -t   include timestamps in some debug messages
#
# Note that -B (daemon mode) and -P (pidfile) options are automatically
# configured by the init.d script and must not be added to DAEMON_OPTS.
#
#DAEMON_OPTS="/var/log/hostapd.log"

Edit /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=US

Edit /etc/sysctl.conf and add line

net.ipv4.ip_forward=1

Run the following as root

iptables -t nat -A  POSTROUTING -o eth0 -j MASQUERADE
iptables-save > /etc/iptables.ipv4.nat

Edit /etc/rc.local and add BEFORE exit 0

iptables-restore < /etc/iptables.ipv4.nat

Reboot your Raspberry Pi

End hostapd setup

weeWX setup

Edit weewx.conf

    # Set to type of station hardware. There must be a corresponding stanza
    # in this file with a 'driver' parameter indicating the driver to be used.
    station_type = Interceptor

[Interceptor]

  driver = user.interceptor
  device_type = observer
  mode = sniff
  iface = wlan0
  pcap_filter = src 10.3.141.62 and dst port 80

Modified from https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md

Original Author: Scott Grayban

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