Install hostapd and dnsmasq

1	sudo apt install hostapd dnsmasq

Configuration

Edit dhcpcd.conf

Edit /etc/dhcpcd.conf and append a new line: denyinterfaces wlan0.

Edit interfaces

Edit /etc/network/interfaces.d/wlan0, and the content is as follows:

allow-hotplug wlan0
iface wlan0 inet static
address 192.168.77.77
netmask 255.255.255.0

Restart dhcpcd service

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sudo service dhcpcd restart
sudo ifdown wlan0
sudo ifup wlan0

Configure hostapd

Edit /etc/hostapd/hostapd.conf, and the contend is as follows:

# This is the name of the WiFi interface we configured above
interface=wlan0
# Use the nl80211 driver with the brcmfmac driver
driver=nl80211
# This is the name of the network
ssid=Pi3-AP
# Use the 2.4GHz band
hw_mode=g
# Use channel 6
channel=6
# Enable 802.11n
ieee80211n=1
# Enable WMM
wmm_enabled=1
# Enable 40MHz channels with 20ns guard interval
ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40]
# Accept all MAC addresses
macaddr_acl=0
# Use WPA authentication
auth_algs=1
# Require clients to know the network name
ignore_broadcast_ssid=0
# Use WPA2
wpa=2
# Use a pre-shared key
wpa_key_mgmt=WPA-PSK
# The network passphrase
wpa_passphrase=raspberry
# Use AES, instead of TKIP
rsn_pairwise=CCMP

Edit /etc/default/hostapd, and append a new line: DAEMON_CONF=”/etc/hostapd/hostapd.conf”
Test: sudo hostapd /etc/hostapd/hostapd.conf