【开发板】【RV1106】【无法连接网络】RV1106如何连接WiFi上网

问题

登录开发板后使用ping www.baidu.com失败，显示

ping: bad address 'www.baidu.com'

原因分析

1. DNS服务篇配置错误或不可用
2. 未连接网络
3. 本地 hosts 文件存在异常配置（禁止了 www.baidu.com 解析）

我遇到的问题是连接WIFI路由器失败，路由器本身能联网，所以重点是让开发板连接路由器

解决

1. 瑞芯微 RV1106 连接wifi的命令是

   wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211
   

   其中 /etc/wpa_supplicant.conf 记录路由器的名称密码，如下

   ctrl_interface=/var/run/wpa_supplicant
   ap_scan=1
   update_config=1
   
   network={
           ssid="WIFI_name"
           psk="password"
           key_mgmt=WPA-PSK
   }
   

   可以直接通过 vi 命令编辑
2. 执行 wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211后我遇到一个问题

   Successfully initialized wpa_supplicant
   rfkill: Cannot open RFKILL control device
   ctrl_iface exists and seems to be in use - cannot override it
   Delete '/var/run/wpa_supplicant/wlan0' manually if it is not used anymore
   Failed to initialize control interface '/var/run/wpa_supplicant'.
   You may have another wpa_supplicant process already running or the file was
   left by an unclean termination of wpa_supplicant in which case you will need
   to manually remove this file before starting wpa_supplicant again.
   
   nl80211: deinit ifname=wlan0 disabled_11b_rates=0
   

   报错信息来看，问题核心是 wpa_supplicant 进程冲突—— 已有一个 wpa_supplicant 进程在占用无线网卡（wlan0）的控制接口，或之前的进程异常退出留下了残留文件，导致新的连接命令无法执行。
3. 找到并杀掉这个进程

   ps | grep wpa_supplicant
   # 找到PID
   kill -9 PID
   # 清理残留文件
   rm -f /var/run/wpa_supplicant/wlan0
   

4. 重新连接

   # 后台启动 wpa_supplicant
   wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf -B
   # 获取 IP
   udhcpc -i wlan0  # BusyBox 通常用 udhcpc 替代 dhclient
   

5. 再试一下ping www.baidu.com，能有返回就成功了

   # ping www.baidu.com
   PING www.baidu.com (110.242.70.57): 56 data bytes
   64 bytes from 110.242.70.57: seq=0 ttl=49 time=95.497 ms
   64 bytes from 110.242.70.57: seq=1 ttl=49 time=13.715 ms
   64 bytes from 110.242.70.57: seq=2 ttl=49 time=25.218 ms
   64 bytes from 110.242.70.57: seq=3 ttl=49 time=25.348 ms