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Updated September 28, 2023

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none Title: Connecting Raspberry Pi to Wifi - A Step by Step Guide

Headline: The easiest way to connect your Raspberry Pi to a wireless network.

Description: Learn how to set up WiFi connectivity on your Raspberry Pi using the command line interface and SSH. This guide will walk you through configuring WPA/WPA2 security, creating a wpa_supplicant file, and connecting your Pi to a wireless network.

Body:

Before we begin, make sure that your Raspberry Pi is running the latest version of Raspbian OS and has an active internet connection via Ethernet cable. To update and upgrade your system run the following commands in terminal:

sudo apt-get update && sudo apt-get upgrade

Now, let’s configure WPA/WPA2 WiFi security. If you are using WEP or no security, please skip to step 3.

  1. Create a new file named wpa_supplicant.conf in the /etc/network/ directory:
sudo nano /etc/network/interfaces.d/wpa_supplicant.conf
  1. Add the following lines to the file, replacing <YOUR-SSID> and <YOUR-WIFI-PASSWORD> with your network’s SSID and password:
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
    wpa-ssid <YOUR-SSID>
    wpa-psk <YOUR-WIFI-PASSWORD>

Save and exit the file by pressing CTRL + X, then Y and Enter.

  1. Edit the /etc/dhcpcd.conf file to enable WiFi:
sudo nano /etc/dhcpcd.conf

Add the following line at the bottom of the file:

interface wlan0
static ip_address=192.168.1.100/24
static routers=192.168.1.1
static domain_name_servers=8.8.8.8.8 8.8.4.4

Save and exit the file by pressing CTRL + X, then Y and Enter.

  1. Disable the built-in WiFi adapter:
sudo ifconfig wlan0 down
  1. Enable the wireless interface:
sudo ifconfig wlan0 up
  1. Connect to your WiFi network:
sudo wpa_supplicant -B -i wlan0 -c /etc/network/interfaces.d/wpa_supplicant.conf

If successful, you should see a message similar to Successfully initialized wpa_supplicant.

  1. Obtain an IP address using DHCP:
sudo dhclient wlan0
  1. Verify your connection by pinging Google’s DNS server:
ping -c 4 8.8.8.8.8

If you receive replies, you have successfully connected to WiFi!

That’s it! Your Raspberry Pi is now connected to the internet via WiFi. If you need to troubleshoot or make changes in the future, remember that the wpa_supplicant.conf file contains your network credentials, so be sure to keep it secure.