Enable/Disable AP mode on a Raspberry Pi

access_point

#! /bin/bash

# Requires hostapd and dnsmasq packages installed

# Parse options using getopt
# https://www.codebyamir.com/blog/parse-command-line-arguments-using-getopt
opts=$(getopt \
    --longoptions "on,off" \
    --name "$(basename "$0")" \
    --options "" \
    -- "$@"
)
eval set --$opts

while [[ $# -gt 0 ]]; do
    case "$1" in
        --on)
            sed -i 's;#include \"/etc/hostapd.conf\";include \"/etc/hostapd.conf\";' /etc/dhcpcd.conf  &&
            systemctl daemon-reload &&
            service dhcpcd restart &&
            systemctl start dnsmasq &&
            systemctl unmask hostapd &&
            systemctl start hostapd &&
            systemctl enable dnsmasq &&
            systemctl enable hostapd &&
            echo heartbeat > /sys/class/leds/led0/trigger
            shift
            ;;

        --off)
            systemctl stop dnsmasq &&
            systemctl stop hostapd &&
            systemctl disable dnsmasq &&
            systemctl disable hostapd &&
            sed -e 's;include \"/etc/hostapd.conf\";#include \"/etc/hostapd.conf\";' -i /etc/dhcpcd.conf &&
            systemctl daemon-reload &&
            service dhcpcd restart &&
            echo none > /sys/class/leds/led0/trigger
            shift
            ;;

        *)
            break
            ;;
    esac
done

dhcpcd_tail.conf

# Add the contents of this file to /etc/dhcpcd.conf before calling access_point
#include "/etc/hostapd.conf"

hostapd.conf

interface wlan0
    static ip_address=192.168.4.1/24
    nohook wpa_supplicant