Raspberry Pi 3 - Configuring it as wireless access point -AP Mode

Copy the necessary firmware files

Create a directory named /firmware/brcm on the root directory of your boot media as it will be automatically copied to /lib/firmware/brcm in the next boot.

Please make sure to include the following files namely brcmfmac43430-sdio.bin and brcmfmac43430-sdio.txt in /firmware/bcrm/ folder of your boot media

Download from https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm

Install hostapd and dnsmasq

apk add hostapd

apk add dnsmasq

Configure hostpad conf file

In /etc/hostapd/hostapd.conf

interface=wlan0

driver=nl80211

ssid=Pi3-AP

hw_mode=g

channel=1

macaddr_acl=0

auth_algs=1

wpa=2

wpa_key_mgmt=WPA-PSK

wpa_passphrase=raspberry

rsn_pairwise=CCMP

wpa_pairwise=CCMP

Configure your /etc/dnsmasq.conf

interface=wlan0

dhcp-range=10.0.0.2,10.0.0.5,255.255.255.0,12h

Configure Static ips for wlan0 in the file /etc/network/interfaces

auto wlan0

iface wlan0 inet static

address 10.0.0.1

netmask 255.255.255.0

Start the services

service dnsmasq start

service hostapd start

Enable the Services permanently on every bootup

rc-update add dnsmasq

rc-update add hostapd

(to del)

rc-update del dnsmasq

rc-update del hostapd

(or)

rc-update add dnsmasq boot

rc-update add hostapd boot

(to del)

rc-update del dnsmasq boot

rc-update del hostapd boot

Commit all changes to files

Make sure you run the below command to commit all changes otherwise they will be lost on reboot

lbu ci

References

https://gist.github.com/atlury/fe0ea8b91a981c103df7

https://frillip.com/using-your-raspberry-pi-3-as-a-wifi-access-point-with-hostapd/

Thanks oneinsect@gmail.com