17. 板载wifi¶
17.2. wifi连接步骤¶
在终端执行sudo fire-config命令，选择“Network”项。 如下图:
选择“WiFi config”项，如下图：
选择“Onboard Enable/Disable the on board WiFi of npi-Pro board”，如下图所示
出现以下界面选择 “Enable” 。
使能成功之后将会提示WiFi已经使能。
回到fire-config的首界面，选择“Finish”
提示是否重启系统，选择“Yes”
6. 重启系统之后，重新选择进入“WiFi config”界面 系统重启后，继续在系统中执行sudo fire-config命令，选择“Network -> WiFi config -> WiFi scan”项， 系统会扫描搜索所有周围的无线网络，并在界面显示wifi的名字和信号强弱. 如果暂时没有识别到wifi，多尝试几次扫描。 如下图:
选择 “Network -> WiFi config -> WiFi connect”，输入wifi名称
输入wifi密码
最后返回到首界面选择“Finish”，并使用ifconfig查看网络连接状态，出现如下界面显示wifi连接成功。
17.3. 常用的wifi常用操作命令¶
sudo ifconfig wlan0 down 关闭wifi使用
sudo ifconfig wlan0 up 启动wifi使用
wpa_cli -i wlan0 status 查看当前连接状态
wpa_cli -i wlan0 list_networks 列出输入过的网络
wpa_cli -i wlan0 disconnect AP1 断开当前连接AP1名wifi(CURRENT)
wpa_cli -i wlan0 reconnect AP1 重新连接AP1或其他
wpa_cli -i wlan0 select_network AP2 切换连接list_networks里面的AP2 wifi
wpa_cli -i wlan0 remove_network AP1 删除不用的AP1（删除前断开）
wpa_cli -i wlan0 save_config 保存配置（如执行完上述删除操作，需要执行保存，否则重启后重新使用上次配置）
更多操作可以网上搜索wpa_cli工具用法
17.4. WiFi AP模式¶
安装相关工具
sudo apt update
sudo apt install wireless-tools hostapd dnsmasq iw git
下载脚本
依次执行以下指令
sudo apt install git
git clone https://github.com/Embedfire-imx6/ebf-tools-src.git
cd ebf-tools-src/create_ap/
chmod +x create_ap
配置环境
使用systemctl status autowifi查看WiFi自动连接服务
root@npi:~# systemctl status autowifi
● autowifi.service - =booting wifi ...
Loaded: loaded (/lib/systemd/system/autowifi.service; enabled; vendor preset:
Active: active (running) since Tue 2021-03-02 10:21:24 CST; 1min 36s ago
Process: 623 ExecStart=/bin/bash /opt/scripts/boot/autowifi.sh (code=exited, s
Tasks: 2 (limit: 388)
Memory: 1004.0K
CGroup: /system.slice/autowifi.service
├─653 wpa_supplicant -B -c /etc/wpa_supplicant/wpa_supplicant.conf -i
└─678 udhcpc -b -i wlan0
Mar 02 10:21:20 npi bash[623]: udhcpc: started, v1.30.1
Mar 02 10:21:21 npi udhcpc[668]: wlan0: deconfigured
Mar 02 10:21:21 npi bash[623]: udhcpc: sending discover
Mar 02 10:21:23 npi bash[623]: udhcpc: sending discover
Mar 02 10:21:23 npi bash[623]: udhcpc: sending select for 192.168.0.61
Mar 02 10:21:23 npi bash[623]: udhcpc: lease of 192.168.0.61 obtained, lease tim
Mar 02 10:21:24 npi bash[623]: ip: RTNETLINK answers: File exists
Mar 02 10:21:24 npi udhcpc[677]: wlan0: bound: IP=192.168.0.61/255.255.255.0 rou
Mar 02 10:21:24 npi su[658]: pam_unix(su:session): session closed for user root
Mar 02 10:21:24 npi systemd[1]: Started =booting wifi ....
关闭WiFi自动连接服务
systemctl disable autowifi
执行命令”sudo update-alternatives --config iptables”，输入数字1
root@npi:/home/debian/ebf-tools-src/create_ap# sudo update-alternatives --config iptables
There are 2 choices for the alternative iptables (providing /usr/sbin/iptables).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/sbin/iptables-nft 20 auto mode
1 /usr/sbin/iptables-legacy 10 manual mode
2 /usr/sbin/iptables-nft 20 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/sbin/iptables-legacy to provide /usr/sbin/iptables (iptables) in manual mode
root@npi:/home/debian/ebf-tools-src/create_ap#
运行脚本
假设wifi接口为wlan0，连接外网的接口是eth0，创建一个热点，名字为npi_wifi，密码为123456789， 运行以下脚本，并传入相关参数。
./create_ap wlan0 eth0 npi 123456789 --no-virt
终端出现如下信息，说明创建成功，若在创建wifi失败，请重启开发板后重试。
root@npi:~/ebf-tools-src/create_ap# ./create_ap wlan0 eth0 npi 123456789 --no-virt
Config dir: /tmp/create_ap.wlan0.conf.angbAubQ
PID: 1198
command failed: Input/output error (-5)
[ 2030.385168] [dhd-wlan0] wl_android_wifi_on : in g_wifi_on=0
[ 2031.789838] [dhd] dhd_conf_read_config : Ignore config file /lib/firmware/bcm/AP6236/Wi-Fi/config.txt
[ 2031.799704] [dhd] dhd_conf_set_path_params : Final fw_path=/lib/firmware/bcm/AP6236/Wi-Fi/fw_bcm43436b0.bin
[ 2031.811048] [dhd] dhd_conf_set_path_params : Final nv_path=/lib/firmware/bcm/AP6236/Wi-Fi/nvram_ap6236.txt
[ 2031.822085] [dhd] dhd_conf_set_path_params : Final clm_path=/lib/firmware/bcm/AP6236/Wi-Fi/clm_bcm43436b0.blob
[ 2031.833326] [dhd] dhd_conf_set_path_params : Final conf_path=/lib/firmware/bcm/AP6236/Wi-Fi/config.txt
[ 2032.071716] [dhd] dhd_conf_set_txglom_params : txglom_mode=multi-desc
[ 2032.081340] [dhd] dhd_conf_set_txglom_params : txglomsize=36, deferred_tx_len=0
[ 2032.090616] [dhd] dhd_conf_set_txglom_params : txinrx_thres=128, dhd_txminmax=-1
[ 2032.099353] [dhd] dhd_conf_set_txglom_params : tx_max_offset=0, txctl_tmo_fix=300
[ 2032.108213] [dhd] dhd_conf_get_disable_proptx : fw_proptx=1, disable_proptx=-1
[ 2032.195122] [dhd] dhd_conf_set_country : set country CN, revision 0
[ 2032.209100] [dhd] dhd_conf_set_country : Country code: CN (CN/0)
[ 2032.225268] [dhd] CONFIG-ERROR) dhd_conf_set_intiovar : ampdu_mpdu setting failed -29
[ 2032.233274] [dhd-wlan0] wl_android_wifi_on : Success
Sharing Internet using method: nat
hostapd command-line interface: hostapd_cli -p /tmp/create_ap.wlan0.conf.angbAubQ/hostapd_ctrl
Configuration file: /tmp/create_ap.wlan0.conf.angbAubQ/hostapd.conf
rfkill: Cannot open RFKILL control device
[ 2032.744618] [dhd-wlan0] wl_cfg80211_del_station : Disconnect STA : 66:66:3a:66:66:3a scb_val.val 3
Using interface wlan0 with hwaddr 28:ed:e0:75:3c:9e and ssid "npi"
[ 2032.842184] [dhd-wlan0] wl_cfg80211_set_channel : netdev_ifidx(5), chan_type(1) target channel(1)
[ 2032.907914] [dhd-wlan0] wl_cfg80211_bcn_bringup_ap : Creating AP with sec=wpapsk/mfpn/0x46
[ 2032.922593] [dhd-wlan0] wl_iw_event : Link UP with 28:ed:e0:75:3c:9e
[ 2032.929155] [dhd-wlan0] wl_ext_iapsta_event : [A] Link up w/o creating? (etype=16)
[ 2032.946892] [dhd-wlan0] wl_notify_connect_status_ap : AP/GO Link up
wlan0: interface state UNINITIALIZED->ENABLED
wlan0: AP-ENABLED