Network Configuration

Wireless network configuration

The tool wpa_supplicant is used for wireless network configuration. It’s a tool for WIFI connection and configuration, which mainly includes two programs: wpa_supplicant and wpa_cli.

Command Line

WIFI Enabled

echo 1 >/sys/class/rkwifi/driver
ifconfig wlan0 up

When it’s done, Running command ifconfig, the wlan0 node can be seen.

Start wpa_supplicant Process

wpa_supplicant -B -i wlan0 -c /data/cfg/wpa_supplicant.conf

Creating the file: /data/cfg/wpa_supplicant.conf if it does not exist, the following configuration need to be added:

vi /data/cfg/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1

Configure WIFI with wpa_cli

Common commands:

wpa_cli -i wlan0 scan             // Search wifi network nearby
wpa_cli -i wlan0 scan_result      // Print the searched WiFi network
wpa_cli -i wlan0 add_network      // Add a network connection

If wireless network is encrypted by [WPA-PSK-CCMP+TKIP] [WPA2-PSK-CCMP+TKIP] [ESS] (wpa encryption), and the wifi name: name, wifi password: psk. The connecting operation is as follows:

wpa_cli -i wlan0 set_network 0 ssid '"name"'
wpa_cli -i wlan0 set_network 0 psk '"psk"'
wpa_cli -i wlan0 enable_network 0    //Enable WiFi

If wireless network is encrypted by [WEP] [ESS] (wep encryption), and the wifi name: name, wifi password: psk. The connecting operation is as follows:

wpa_cli -i wlan0 set_network 0 ssid '"name"'
wpa_cli -i wlan0 set_network 0 key_mgmt NONE
wpa_cli -i wlan0 set_network 0 wep_key0 '"psk"'
wpa_cli -i wlan0 enable_network 0

If wireless network is encrypted by [ESS] (no encryption)，and the wifi name: name, the connecting operation is as follows：

wpa_cli -i wlan0 set_network 0 ssid '"name"'
wpa_cli -i wlan0 set_network 0 key_mgmt NONE
wpa_cli -i wlan0 enable_network 0

Save WIFI connection information:

wpa_cli -i wlan0 save_config

Resume the saved connection:

wpa_cli -i wlan0 list_network        // List all saved connections
wpa_cli -i wlan0 select_network 0     // Connect the first saved connection
wpa_cli -i wlan0 enable_network 0      // Enable the first saved connection

Turn off WiFi:

ifconfig wlan0 down

WIFI configuration file

Modify the following files:

vi /data/cfg/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1

Add following items:

network={
ssid="WiFi-AP"		// WiFi name
psk="12345678"		// WiFi password
key_mgmt=WPA-PSK	// Encryption
# key_mgmt=NONE		// No encryption
}

Re-load the above configurations:

wpa_cli reconfigure

Re-connection:

wpa_cli reconnect

Configure WIFI by mobile phone

There are many ways to use mobile phones to configure WiFi networks, either through Softap or Bluetooth. The integrated speech recognition SDK will also include its own methods, such as “小度之家 SDK”.

The built-in network configuration methods of ROC-RK3308-CC will be introduced here.

Configure WIFI Network with SoftAP

Download the APP: RkEcho.apk, or it can be found in SDK:SDK/external/app/RkEcho.apk

Buildroot configuration:

_images/softapserver_config.png

Source directory of softapServer:

/external/softapServer/ -- operations related to WIFI and APK 
/external/softapDemo/ -- operations related to WiFi

Prepare a mobile phone to install apk RkEcho.apk, it’s indispensable.

Then, confirm the wpa_supplicant process has started

wpa_supplicant -B -i wlan0 -c /data/cfg/wpa_supplicant.conf

Configure WIFI Network as follows:

● Running the following commands:

softapServer Rockchip-Echo-123

_images/wifi_server.png

Note: wifi AP must be named in the format Rockchip-Echo-xxx。

● After the AP is turned on, open the WiFi settings of the mobile phone and click on the connection to the AP just set up , such as Rckchip-Echo-123.

● When connection is done, open the apk installed in the mobile phone and conduct the following operation:

Open apk, click wifi setup -> CONFIRM -> 确认 -> wifi list -> click the network to be connected -> input password -> click OK.

_images/network_conf.png

● Start to use when the voice prompts to notify network has been connected!

● Check if network is connected:

# ping www.google.com

● Noted points:

  1. When the command softspServer Rockchip-Echo-123 has been executed, it cannot be withdrawn till the network config has been completed.

  2. Never setup a wrong AP name, otherwise apk will not enter the confirmation interface (Rockchip-Echo-xxx)

  3. This function only supports Android phones currently.

Ethernet

Ethernet Enabled

ifconfig eth0 up

IP address setting

Dynamically obtain IP address

WIFI dynamically obtains IP address , run the following commands:

udhcpc -i wlan0 -R

Ethernet dynamically obtains IP address , run the following commands:

udhcpc -i eth0 -R

Set static IP address

Steps of static IP address setting for Ethernet are as follows:

ip addr add 168.168.100.78/255.255.0.0 dev eth0 #ip address/subnet mask
ip route flush dev eth0
ip route add 168.168.0.1 dev eth0		#gateway
ip route add default via 168.168.0.1 dev eth0 #add default router
echo -e "nameserver 114.114.114.114\nnameserver 8.8.8.8" > /userdata/resolv.conf #set DNS

Steps of static IP address for WIFI are the same with above.