Set Up WiFi on a Raspberry Pi 2

by May 2, 2016Getting Started, Pool Monitor, Raspbian, Software6 comments

Setting up WiFi on a Raspberry Pi (Pi) is a very simple process if you are using the latest version of Raspian, it can be very helpful if you want to use your Pi in an indoor/outdoor environment where being connected via an Ethernet cable is not possible.

The Raspberry Pi 3 and 4 have a built-in WiFi adapter but to setup WiFi on a Raspberry Pi 2 you are going to need to use a USB dongle, either regular or high gain.

This guide will take you through the steps to set up the WiFi using the desktop if you have a keyboard and monitor connected or using Putty and command line (CLI).

 

Materials

 

 In this tutorial I will be using the following materials:

 

Setting Up WiFi Using the Desktop

 

This process assumes that you have completed the initial setup of your Pi and have a keyboard, mouse, monitor and WiFi dongle attached. If you have access to your desktop then there is no need to have an ethernet cable connected. Turn on your Pi and wait for it to boot to the desktop environment then locate the network icon on the top right-hand side of your menu bar.

 

Raspberry Pi Network Connection Icon

 

Click on the icon to see a list of available WiFi networks.

 

Raspberry Pi Select Wifi

 

Select your network and you will be presented with a popup requesting your router password (This can normally be found on the back of your router).

 

Raspberry Pi Enter Wifi Password

 

Enter your password and you should now see your network icon change to a WiFi icon.

 

Raspberry Pi Wifi Symbol

 

Your RPi should now be connected to your Wifi network, click on the Wifi icon to confirm that the green tick is on the WiFi network that you selected. A further step that you may consider is to set up your WiFi connection with a static IP address.

 

Raspberry Pi Wifi Network Connected

Setting up WiFi Using the Command Line Interface (CLI)

 

This process again assumes that you have completed the initial setup  of your Pi but this time without any keyboard or monitor attached. You will need to have a network cable connected and SSH enabled so that communication can occur for the setup.

You will need to know the IP address of your Pi so you can connect to it, this can be done in several ways depending on your setup. I recommend following the instructions from the Raspberry Pi Foundation. 

Once your ready connect the USB dongle and reboot the Pi, SSH to the Pi using Putty.

 

Putty connection using IP address

 

Scan for your WiFi network using the following command.

 

 

This command will provide you with the ESSID of your WiFi, again you will need to know the password for your router.

 

Check for Wi-Fi

 

Next, we will need to edit the wpa_supplicant.conf file by entering the following command

 

 

WPA Supplicant File

 

Go to the bottom of this file and enter the following statement including your ESSID and password

 

Ensure that you include the double quotes.

 

Contents of WPA Supplicant file

 

In order to exit and save the file with the same name, press CTRL+X and then Y and finally hit enter. Shutdown the Pi.

 

 

Once your Pi is shutdown disconnect the power cable and the ethernet cable, then restart. Again you need to know your IP address of the Pi so follow the previous techniques from the Raspberry Pi Foundation, use this IP address to log into the Pi using SSH.

In order to confirm that the WiFi connection is working as expected, you can execute the following two commands.

 

 

The first command will provide you with the current IP address while the second is more wireless specific and shows SSID, frequency, power, link quality, etc. If the Link Quality reads 0/70, then the WiFi adapter didn’t get connected properly.

Output of ifconfig and iwconfig commands

 

If for any reason you want to activate/deactivate the WiFi capabilities of the Pi then the following two commands can be used.

 

 

Finally, if you want a known IP address so that you don’t have to look it up each time you restart follow this tutorial to set a static IP for the Wi-Fi connection.

If you have any thought’s about this article, improvements or errors let me know in the comments below and if you found this helpful, why not share it with others.

Pin It on Pinterest

Share This