SSD_WIFI AP&STA Enabling Introduction

---

1. Overview

sta mode: take wifi as a client to connect AP/router.

ap mode: take wifi as a hotspot for other devices to connect.

---

2. Board Modification

---

2.1. Enable STA Mode

1. Add information of AP

   / # vi appconfigs/wpa_supplicant.conf
   ctrl_interface=/tmp/wifi/run/wpa_supplicant
   update_config=1
   
   network={
       ssid="aryl iPhone"
       psk="123456789a"
   }
   

2. Initialize wifi

   cd /config/wifi

   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/lib:pwd

   Execute the initialization script:

   Execute ssw01bInit.sh on ssd20x

   Execute sigma_wifi_init.sh on ssd21x

3. Test wifi connection

   ./wpa_supplicant -Dnl80211 -i wlan0 -c /appconfigs/wpa_supplicant.conf -d &
   sleep 2
   udhcpc  -i wlan0 -s /etc/init.d/udhcpc.script &
   

   Check connection status:

   ./wpa_cli -i wlan0 -p /tmp/wifi/run/wpa_supplicant status
   

4. ping

   ping -I wlan0 14.215.177.39
   

5. DNS

   Add nameserver 8.8.8.8 in /etc/resolv.conf;

   When testing, /etc/resolv.conf is missing or not writable, and dns server can be added by default in rootfs_dispcam.mk on ssd21x. modify rootfs.mk on ssd20x.

   touch $(OUTPUTDIR)/rootfs/etc/resolv.conf
   echo "nameserver 202.96.128.86" >> $(OUTPUTDIR)/rootfs/etc/resolv.conf
   echo "nameserver 8.8.8.8" >> $(OUTPUTDIR)/rootfs/etc/resolv.conf;
   

   Import the dns support library path, which depends on the path of libdns.

   export LD_LIBRARY_PATH=$LD_LIBRARY_ifPATH:/customer/libdns
   

   There is a corresponding lib in customer/libdns by default.

   If the folder is missing, please copy "libnss_dns*","libnss_files*","libresolv*" in the corresponding compiler.

   ping -I wlan0 
   /config/wifi # ping -I wlan0
   
   PING (163.177.151.109): 56 data bytes
   64 bytes from 163.177.151.109: seq=0 ttl=55 time=8.638 ms
   64 bytes from 163.177.151.109: seq=1 ttl=55 time=11.019 ms
   64 bytes from 163.177.151.109: seq=2 ttl=55 time=8.133 ms
   64 bytes from 163.177.151.109: seq=3 ttl=55 time=8.579 ms
   

   STA mode finished verification when completed the test steps above.

---

2.2. Enable AP Mode

1. Enable AP mode

   ifconfig p2p0 up
   ifconfig p2p0 192.168.1.100 netmask 255.255.255.0
   ./hostapd -B /config/wifi/hostapd.conf
   ./dnsmasq -i p2p0 --no-daemon -C /config/wifi/dnsmasq.conf &
   

   Check the device information:

   ./hostapd_cli -i p2p0 -p /var/run/hostapd all_sta &
   

2. Search ssid by PC: ssw101bap; passwd：12345678(ssid and password can be changed in hostapd.conf)

   AP mode finished verification when completed the test steps above.

STA and AP modes finished verification when completed the test steps above.