ที่มา: https://raspberrypihq.com/how-to-connect-your-raspberry-pi-to-wifi/
Getting your network information
For the purpose of this guide we will be connecting to a WiFi network with the following information:
- SSID (Network Name): Test Wifi Network
- PSK (Password): SecrectPassWord
Every time you see this network name and password in the guide you need to change them to the network name and password of your local network.
If you need to find the network name of your local network you can run the following command in the Raspberry terminal:
sudo iwlist wlan0 scan
This will list all the networks in your vicinity along with some useful information for each network. To find your network name look for something that look like: ESSID:”Test Wifi Network”.
Configuring your WiFi network
To tell the Raspberry Pi to automatically connect to your WiFi network you need to edit a file called: wpa_supplicant.conf.
To open the file in nano type the following command:
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Scroll to the end of the file and add the following to the file to configure your network:
network={
ssid="Test Wifi Network"
psk="SecretPassWord"
}Remember to replace this with your own network name and password.
Save and close the file by pressing Ctrl+X followed by Y. At this point the Raspberry Pi should automatically connect to your network.
You can check your network connection by running the following command:
ifconfig wlan0
If the output looks something like this (with an inet addr) you are connected:
wlan0 Link encap:Ethernet HWaddr 74:da:38:2b:1c:3d
inet addr:192.168.1.216 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::8727:5526:a190:b339/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6917 errors:0 dropped:229 overruns:0 frame:0
TX packets:2931 errors:0 dropped:1 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10001000 (9.5 MiB) TX bytes:295067 (288.1 KiB)Sometimes the Raspberry Pi will not connect automatically and require a reboot to connect.
If it doesn’t connect after waiting 2-3 minutes try to reboot the pi using the following command:
sudo reboot
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