Wifi not work

Troubleshooting
1

Hello, I am not able to get the Pi4 to connect via WIFI.

I have fixed the addressing statically in the file /etc/network/interfaces

# WiFi
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.0.62
netmask 255.255.255.0
gateway 192.168.0.1
dns-nameservers 192.168.0.60

And configure file wpa_supplicant.conf (my network is hidden)

root@DietPi:~# cat /etc/wpa_supplicant/wpa_supplicant.conf
# Grant all members of group "netdev" permissions to configure WiFi, e.g. via wpa_cli or wpa_gui
ctrl_interface=DIR=/run/wpa_supplicant GROUP=netdev
# Allow wpa_cli/wpa_gui to overwrite this config file
update_config=1
network={
        ssid="WLAN_XXXX"
        scan_ssid=1
        proto=RSN
        key_mgmt=WPA-PSK
        psk="XXXXXXXXX"
}

But not connect.It only connects if I manually execute the command. With raspberry PI OS it connects perfectly following the same steps

wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf
2

Hi,

usually you would need to activate WiF first on dietpi-config. After a reboot, this as well would be the place to configure your WiFi connection

3

Hello,

Thanks for the answer, what you say I have already done, and it indicates that the interface is ON but disconnected.

I have tried to leave only the wireless interface activated and to enter the data from dietpi-config but it still does not connect

4

can you reboot your system and have a look if the interface is started at all

journalctl -u ifup*
5 
root@DietPi:~# journalctl -u ifup*
-- Logs begin at Thu 2019-02-14 11:11:58 CET, end at Sun 2021-04-25 10:38:01 CEST. --
Apr 25 10:35:57 DietPi systemd[1]: Starting Helper to synchronize boot up for ifupdown...
Apr 25 10:35:57 DietPi systemd[1]: Started Helper to synchronize boot up for ifupdown.
Apr 25 10:35:59 DietPi systemd[1]: Starting ifup for wlan0...
Apr 25 10:35:59 DietPi systemd[1]: Starting ifup for eth0...
Apr 25 10:35:59 DietPi sh[359]: /etc/network/if-pre-up.d/wpasupplicant: 120: /etc/network/if-pre-up.d/wpasupplicant: cannot create /dev/stderr: No such device or addres
s
Apr 25 10:35:59 DietPi sh[359]: run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
Apr 25 10:35:59 DietPi sh[359]: ifup: failed to bring up wlan0
Apr 25 10:35:59 DietPi systemd[1]: ifup@wlan0.service: Main process exited, code=exited, status=1/FAILURE
Apr 25 10:35:59 DietPi systemd[1]: ifup@wlan0.service: Failed with result 'exit-code'.
Apr 25 10:35:59 DietPi systemd[1]: Failed to start ifup for wlan0.
Apr 25 10:35:59 DietPi sh[360]: eth0=eth0
Apr 25 10:35:59 DietPi ifup[455]: ifup: interface eth0 already configured
Apr 25 10:35:59 DietPi systemd[1]: Started ifup for eth0.
6

error seems to be with wpasupplicant as it is not able to print some messages.

Apr 25 10:35:59 DietPi sh[359]: /etc/network/if-pre-up.d/wpasupplicant: 120: /etc/network/if-pre-up.d/wpasupplicant: cannot create /dev/stderr: No such device or address

can you have a look ls -l /dev/st*

just for testing, can you do ifup wlan0

MichaIng
can you have a look as well pls

7

Good,

As I was already bored with the topic, at the end I installed WICD and after configuring this everything works correctly.

Greetings

8

I have this issue aswell, been through all main raspberry pi OS’s, official raspian, linux server, and dietpi. All have same issue on raspberry pi 3B saying “no wireless interface found” when there is, and it was once used by my child on the KANO operating system (coding for kids) and wifi worked fine. any ideas? (obvious lack of terminal+Linux knowledge)

9

this is a 2 year old topic. Better to start an own new one.