No stats while using wlan1

[Ewwwer]

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Describe the bug
Hi, i'm using an external wifi antenna (Realtek RTL8188EU) on Raspberry Pi 4b 4gb.
It works fine but I have noticed that the consumption statistics are only available for eth0 and wlan0. Do I have it wrongly configured?
How can I have consumption statistics also in wlan1?
Thank you

[billz]

Execute vnstat -i wlan1 and post the result.

[Ewwwer]

Thanks @billz, the report says "unble to read database /var/lib/vnstat/wlan1: Document not found.
But the strange thing is that I was broadcasting the signal through wlan1

[billz]

The error indicates a problem with vnstat. You can try a couple of things:

1. vnstat may not be able to write to /var/lib/vnstat. check which user the daemon is running under with ps aux | grep vnstatd. if it's inactive or running under an account other than vnstat, give the service a kick with sudo systemctl restart vnstat.service
2. force an update for wlan1 with sudo vnstat -u -i wlan1. this will create the database for that interface if it doesn't exist

[Ewwwer]

Hi, I’ve tried all the possibilities that you’ve told me, this is the result:

But for the other way, the things are changed for the command vnstat -i wlan1:

I’m gonna use it and see if your suggestions tips are working well. Thanks a lot

[Ewwwer]

Good news, it works perfectly! Thanks a lot

[billz]

great! glad to hear it

[brunopiras]

Same problem, but on command line appears that vnstat works, on ubuntu 20.04 (not raspberry):

apu2@routerx:~$ ps aux | grep vnstatd
vnstat 1138 0.0 0.0 5608 3768 ? Ss 13:58 0:02 /usr/sbin/vnstatd -n
apu2 3848 0.0 0.0 11084 728 pts/1 S+ 16:16 0:00 grep --color=auto vnstatd

vnstat -i wlp4s0
Database updated: 2020-10-16 16:15:00

wlp4s0 since 2020-10-15

      rx:  64,05 MB      tx:  496,57 MB      total:  560,62 MB

monthly
rx | tx | total | avg. rate
------------------------+-------------+-------------+---------------
2020-10 64,05 MB | 496,57 MB | 560,62 MB | 3,31 kbit/s
------------------------+-------------+-------------+---------------
estimated 125,88 MB | 980,29 MB | 1,11 GB |

daily
rx | tx | total | avg. rate
------------------------+-------------+-------------+---------------
yesterday 31,37 MB | 260,08 MB | 291,44 MB | 26,98 kbit/s
today 32,68 MB | 236,49 MB | 269,17 MB | 36,81 kbit/s
------------------------+-------------+-------------+---------------
estimated 48,26 MB | 349,28 MB | 397,54 MB |

[billz]

@brunopiras Ubuntu 20.04 is untested and unsupported at this time.

[brunopiras]

@brunopiras Ubuntu 20.04 is untested and unsupported at this time.

Thanks for your reply
I would like to help with this problem, the new version of vnstat generates in the /var/lib/vnstat folder a single database with the name "vnstat.db" that contains all the information about the network interfaces while, the old versions of vnstat generated a database for each interface that was detected with the name of the interface itself.

I solved this by uninstalling version 2.2.x of vnstat:

sudo apt-get purge vnstat

download and installing an old one (I used the 1.14):

sudo dpkg -i vnstat_1.14-1ubuntu2_amd64.deb

then blacklisting the program to avoid future updates:

echo "vnstat hold" | sudo dpkg --set-selections

Now works well..
Thanks

[stale]

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