Community Forum

Can't connect to the network

(Rayane ) #1

Hey, I have some issues with connecting to the network knowing that i have reconfigured wpa_supplicant.conf and i’m using Raspbian for Navio OS, when i do ping command i get unknown host
Any Help would be appreciated

(Marc Lebret) #2


Verify the presence of quotes around SSID and Password:


Sometimes you have to push a button on your modem to accept new client?


(Rayane ) #3

Thanks for the reply, well there is no button in the access point and i’m pretty much sure that i added the quotes.
Any other suggestions!! you can see what i did in the following photos:

after rebooting
still no connection

(Marc Lebret) #4

There is a typo in your wpa_supplicant.conf

You use underscore in WPA_PSK, it is WPA-PSK

Here is my ifconfig result:

pi@navio:~ $ sudo ifconfig
eth0 Link encap:Ethernet HWaddr b8:27:eb:52:1a:e7
inet6 addr: fe80::ec9d:1183:dac9:5a05/64 Scope:Link
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

intwifi0 Link encap:Ethernet HWaddr b8:27:eb:07:4f:b2
inet addr: Bcast: Mask:
inet6 addr: fe80::eb16:fcc6:6dad:4bf1/64 Scope:Link
RX packets:191 errors:0 dropped:61 overruns:0 frame:0
TX packets:183 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23287 (22.7 KiB) TX bytes:23076 (22.5 KiB)

lo Link encap:Local Loopback
inet addr: Mask:
inet6 addr: ::1/128 Scope:Host
RX packets:191 errors:0 dropped:0 overruns:0 frame:0
TX packets:191 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:15606 (15.2 KiB) TX bytes:15606 (15.2 KiB)

Hope you solve your problem,

W10 remark: I have to use PX4 console (from PX4 Toolchain) to connect via ssh to my Navio.


(Rayane ) #5

Thanks i will try it. i had something confusing i wish you tell me your opinion about it, Well some friend shared his wifi and i tried to connect to it with my RPi and it worked unlike the wifi i showed in the configuration file, Any ideas about what happend?? knowing that didn’t add the line of WPA-PSK in the file and i can connect to that wifi using my laptop so i’m pretty much sure that i did no error of writing
Thanks in advance

(Rayane ) #6

Hey i corrected the error and reboot again but still no connection

Any other suggestions!!! Knowing that i can connect to the same wifi with my laptop

(George Staroselskiy) #7

Hello there! We’ll need a little more information to get to the bottom of this issue and more specifically:

  1. What Raspberry Pi is in use?
  2. What Wi-Fi dongle are you using?
  3. Could you also share with results of sudo iw wlan0 scan | grep -B7 -A50 IBISC? The latter scans for available networks and filters results to show information relevant to your one.
  4. Is it possible that your network s 5Ghz whereas your dongle only supports 2.4Ghz?

I also recommend using this tip to populate the wpa_supplicant.conf.

(Rayane ) #8

Hey here it is what you asked for:
I’m using RPi 3 model B

Since i’m working with RPi 3 i don’t need wifi dongle
and here you can find the rersult of sudo iw wlan0 scan | grep -B7 -A50 IBISC

and there is another thing, i messed my /etc/network/interfaces up while trying to solve the problem maybe this could be problem. here it is the file after the changes:

please Any suggestions!!??

(George Staroselskiy) #9

Seems like you don’t use the latest stable. I guess once that one is flashed, your problems will vanish.

(Rayane ) #10

Hey again, well i tried the new release and now i’m having an extra problems :disappointed:

  1. the scaning is not supported :

  1. Even the result of sudo iw wlan0 scan | grep -B7 -A50 IBISC is not available:

  1. Could you please tell me what to do next after populating the file command:

here you can find the file after reconfigurations:

Please any other ideas!!!

(George Staroselskiy) #11

We renamed the internal Wi-Fi to intwifi0 (I.e. you’ll need to run iw intwifi0 scan. That’s why your command doesn’t work. Could you try using an external dongle and see if it works out for you?
I don’t understand why did you run wpa_passphrase the way you did. It should be sudo bash -c "wpa_passphrase IBISC-ST-INV 1234456789A >> /boot/wpa_supplicant.conf".
Could you also post the output of ls -l /etc/wpa_supplicant/wpa_supplicant.conf and dmesg?
You can also try removing the first line with the country code and see if it helps.

(Rayane ) #12

well, the scanning show the wifi i’m using
and for the dongle, I dont have one but before installing the new release the one i used before have no problem connection with other wifi but it couldn’t connect to this wifi (IBISC-ST-INV) Knowing that it has no filtering and can connect to it with my LapTop
the command >ls -l /etc/wpa_supplicant/wpa_supplicant.conf outpus is:

and for dmesg :

well it is so long sorry for the camera resolution if it is not clear enough just tell me
and for the country code i removed it and rebooted but still not working.

(Rayane ) #13

Hey,I haven’t managed to get any WiFi connecting yet,when scanning it shows the wifi that i want to connect to But I cannot connect to it. When I used the ethernet cable it is worked. but i couldn’t ssh to the device.

and this is form my Laptop

is it a must to be connected to the same network to ssh???
suggestions are welcomed

(Rayane ) #14

Hey, The problem is solved. from what i read There is something called dhcpcd (daemon) service. This seems to be run before the system parses the /etc/network/interfaces file.
so to overcome that the daemon dhcpcd should be disabled using this command sudo update-rc.d -f dhcpcd remove or another option is to force the daemon dhcpcd to retrieve the IP address you like by reconfiguring nano /etc/dhcpcd.conf file. That’s what i did actually.
I wonder how come that no one had this problem before. Anyway thanks for the suggestions you gave guys.

(George Staroselskiy) closed #15