Raspberry Pi WiFi Direct

Raspberry Pi WiFi Direct 사용을 위한 설정 방법.

/etc/wpa_supplicant/wpa_supplicant.conf을 아래와 같이 수정한다.

ctrl_interface=DIR=/var/run/wpa_supplicant
update_config=1
ap_scan=1
device_name=RPi_3 

# Primary Device Type

# Used format: <categ>-<0UI>-<subcateg>

# 1-0050F204-1 (Computer / PC)

# 1-0050F204-1 (Computer / Server)

# 1-0050F204-1 (Storage / NAS)

# 1-0050F204-1 (Network Infrastructure / AP)

device_type=1-0050F204-1 

driver_param=use_p2p_group_interface=1
driver_param=p2p_device=1

# If you need to modify the group owner intent, 0-15, the higher

# number indicates preference to become the GO. You can also set

# this on p2p_connect commands.

p2p_go_intent=10 

# p2p_go_ht40 - Default mode for HT40 enable when operating as GO.

# This will take effect for p2p_group_add and p2p_connect. Note that

# regulatory constraints and driver capabilities are consulted anyway,

# so setting it to 1 can't do real harm

# By default: 0 (disabled)

p2p_go_ht40=1

수정 후 아래와 같이 console에 입력한다.
$sudo wpa_supplicant -B -dd -iwlan0 -Dnl80211 -c /etc/wpa_supplicant/wpa_supplicant.conf

선택된 Interface출력
$wpa_cli p2p_find

Slected interface 'p2p-dev-wlan0'

OK

Peer의 mac address를 출력.
$wpa_cli p2p_peers

Selected interface 'p2p-dev-wlan0'

aa:bb:cc:dd:ee:ff

PIN 인증을 통한 연결을 사용.
$wpa_cli p2p_connect [연결할 taget MAC address xx:xx:xx:xx:xx:xx] pin auth
PIN 번호가 생성 됨.

ex)

$wpa_cli p2p_connect aa:bb:cc:dd:ee:ff pin auth 

12341234

$wpa_cli p2p_connect [연결할 target MAC Address yy:yy:yy:yy:yy:yy] [PIN 번호]


Ref:
http://processors.wiki.ti.com/index.php/OMAP_Wireless_Connectivity_NLCP_WiFi_Direct_Configuration_Scripts#Create_1:2_P2P_Group_-_Connect_with_PIN_code
https://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplicant.conf