When you use Raspberry Pi for your projects, you may encounter many problems with your wireless or Wi-Fi connection. In this article I will talk about various problems related to Wi-Fi networks and I will show you how to solve them. Okay, let’s get started.

Setting up a Wi-Fi network with the wpa_supplicant provider

If you are using an operating system on Raspberry Pi, such as Raspberry Pi OS, Ubuntu 20.04 LTS, Kali Linux or Manjaro with the desktop environment installed, you can easily connect to the Wi-Fi network via the graphical user interface. However, if you are using a headless operating system on Raspberry Pi, such as Raspberry Pi OS Lite or Ubuntu 20.04 LTS or Debian, you will need to manually configure the Wi-Fi network interface to connect to the Wi-Fi network.

Under Raspberry Pi you can create a wpa_supplicant.conf file in the startup area of the microSD card to configure the Wi-Fi network interface of your Raspberry Pi.

After creating the configuration file in wpa_supplicant.conf, enter the following lines of code When finished, change your Wi-Fi SSID (ssid) and password (psk).

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev


Debian allows you to add Wi-Fi network information in /etc/network/interfaces.d/wlan0 to make configuring the Wi-Fi network interface easier.

To do this, open the /etc/network/interfaces.d/wlan0 configuration file in the Nano word processor as follows

$ nano /etc/network/interfaces.d/wlan0–-Linux-Hint.png

Then remove the # character from each line as shown in the screenshot below–-Linux-Hint.png

Change wpa-ssid for your Wi-Fi SSID and wpa-psk for your Wi-Fi password.

Then press + X and then Y and save the configuration file /etc/network/interfaces.d/wlan0.–-Linux-Hint.png

To make the changes take effect, restart your Py Framboise with the following command:–-Linux-Hint.png

You can configure the Wi-Fi network interface on Ubuntu with CloudInit.

To do this, open the Cloud Init network configuration file /etc/netplan/50-cloudinit.yaml with the following command :

$ sudo nano /etc/netplan/50-cloud-init.yaml–-Linux-Hint.png

By default, the 50cloud-init.yaml file should look like the figure below.–-Linux-Hint.png

Add the highlighted lines in the screenshot below to configure the Wi-Fi wlan0 network interface with CloudInit. Remember to change the SSID of the Wi-Fi network you wish to connect to and the password of the Wi-Fi network you wish to connect to.

NOTE: Don’t forget to save the correct expression with (space) in each line, like in the screenshot below. Otherwise, Cloud-Init won’t work. In YAML configuration files, indentation is very important.

When you are done, press + X and then Y and save the file 50cloud-init.yaml.–-Linux-Hint.png

To make the changes take effect, restart your Py Framboise with the following command:–-Linux-Hint.png

After downloading Raspberry Pi it should automatically connect to the desired Wi-Fi network and configure itself via DHCP, as you can see in the screenshot below.–-Linux-Hint.png

Wrong country code in filewpa_supplicant.conf.

If you configure Wi-Fi on Raspberry Pi with wpa_supplicant, you must set the 2-letter country code in the wpa_supplicant.conf configuration file.

For example, if you live in the United States of America (US), the two-letter country code is US. If you live outside the United States, you will find your country’s two-letter country code in the Alpha-2, Alpha-3 (ISO 3166) country code list.

Sometimes your Raspberry Pi will not be able to connect to your Wi-Fi network if you have the wrong country code in wpa_supplicant.conf, even if everything else is correct.

So make sure wpa_supplicant.conf has the correct two-letter country code if you are having problems with your Wi-Fi connection in Raspberry Pi.–-Linux-Hint.png

Use of an invalid group in wpa_supplicant.conf.

To connect to a Wi-Fi network and set up the Wi-Fi interface, you must have operating system privileges. The root user can do whatever he wants. It’s no problem. However, as a normal user, if you want to make system-level changes (such as configuring the Wi-Fi network interface), you may need to be a member of certain predefined groups.

On Raspberry Pi OS or Debian operating systems, the group you need to connect to configure the Wi-Fi network interface is netdev.

In Ubuntu, the band is called Wheel.

If you are having problems with your Wi-Fi connection, make sure you have the correct GROUP (depending on your operating system) in wpa_supplicant.conf.–-Linux-Hint.png

wlan0 Do not obtain the IP address automatically via DHCP.

Sometimes Raspberry Pi connects to the appropriate Wi-Fi network, but does not receive IP addresses. You cannot connect to the Internet without an IP address assigned to your Wi-Fi network interface.

If for some reason the DHCP client program on your Raspberry Pi does not work properly, this may happen.

To resolve this issue, you can manually ask the DHCP client software for IP address information from the Wi-Fi router to which Raspberry Pi is connected.

To do so, execute the following command:–-Linux-Hint.png

The Wi-Fi network interface must be configured using the IP address information from the DHCP server running on your Wi-Fi router.–-Linux-Hint.png

Wi-Fi without automatic connection

Sometimes Raspberry Pi does not automatically connect to a Wi-Fi network when downloading.

If you experience this problem, I suggest you check that you have the correct Wi-Fi SSID and password in the Wi-Fi configuration files wpa_supplicant.conf or /etc/netplan/50-cloud-init.yaml or /etc/network/interfaces.d/wlan0. You, your neighbour or your ISP can change the SSID or password of the router or Wi-Fi access point. Make sure your Wi-Fi setup files are up to date.

If you use wpa_supplicant to set up a Wi-Fi network on Raspberry Pi, Debian or Ubuntu, this may happen if there is a syntax error in the wpa_supplicant.conf file.

If you are using CloudInit in Ubuntu to configure the Wi-Fi network interface, make sure each line in /etc/netplan/50-cloudInit.yaml is properly indented. Defective indentations in the YAML configuration file are one of the most common causes of these problems.

Pi-Raspberry is outside the Wi-Firange.

Every Wi-Fi network device has a number of limitations. If Raspberry Pi is too far away from your Wi-Fi router or access point due to a weak network connection, it may stop.

To solve this problem, make sure your Raspberry Pi is not too far away from your Wi-Fi router or access point. If the distance is too great for your Raspberry Pi, consider using a wired Ethernet network instead of Wi-Fi.


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