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slow ssh wifi connexion nanopi neo air


aminos

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Hi,

I have a problem with the ssh wifi connection with the nanopi neo air it has every faith that I connect it is too slow
I have disabled the NetworkManager with the following commands
Systemctl stop NetworkManager.service
Systemctl disable NetworkManager.service

And configured my network connection with the / etc / network / interfaces file

And also i have disabled iwconfig
Iwconfig wlan0 power off

always remains the problem of SSH slow

thenks for your help

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We are not clairvoyant or mind readers :P Please describe your setup as best as possible so we know what your operating environment is like.

 

1. Logs, when you can boot the board: armbianmonitor -u (paste URL to your forum post)

2. Did you attach antenna? Without it works very bad.

3. What is slow? Connecting? Transfer? Can you do iperf3 test to your server / other wired machine?

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System wise and if you start from a clean image, there should be nothing wrong. First, check this post, to see what transfer rates are possible to get out from this chip in some real world scenario. When you are using ssh, a connection is encrypted and CPU power is used, which can only slower this transfer speed. AFAIK hardware assisted encryption is n/a in this kernel/chip. More info: http://linux-sunxi.org/Sunxi_devices_as_NAS#cite_note-3

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58 minutes ago, aminos said:

I already download the latest image version available in the web site armbian https://www.armbian.com/orange-pi-zero-2-h3/ 

 

That's all fine. I am only wondering if you understand hardware limits of those boards. Wireless - encryption speed? SSH transfer will be much slower than with some (wired) Intel based desktop. And another example - faster version of this Opi Zero2 with H5 might show better results by using the same wireless chip.

 

Can you provide iperf3 measurements between your Opi Zero2 and some wired server / router? To see if your wireless speed operates at a normal rate.

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I can't receive anything after a typing the following   command :

root@orangepizeroplus2:~# iperf3 -c 192.168.1.1
iperf3: error - unable to connect to server: Connection refused

 

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1 hour ago, aminos said:

iperf3: error - unable to connect to server: Connection refused

 

On that or some other wired server you need to run iperf3 server with the command:

 

iperf -s

 

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I do this 

 

Croot@orangepizeroplus2:~# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------

 

and i have also this error

 

root@nanopiair:~# iperf3 -c 192.168.42.1
iperf3: error - unable to connect to server: Connection refused

 

 

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Hi, I have just done the test with the command iperf3 and I get this :

--------------------------------------------------------------------------------------------

root@nanopiair:~# iperf3 -c 192.168.42.1
Connecting to host 192.168.42.1, port 5201
[  4] local 192.168.42.113 port 44649 connected to 192.168.42.1 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  1.94 MBytes  16.3 Mbits/sec    0    112 KBytes
[  4]   1.00-2.00   sec  1.88 MBytes  15.8 Mbits/sec    0    194 KBytes
[  4]   2.00-3.00   sec  1.94 MBytes  16.3 Mbits/sec    0    276 KBytes
[  4]   3.00-4.00   sec  1.84 MBytes  15.4 Mbits/sec    0    359 KBytes
[  4]   4.00-5.00   sec  1.80 MBytes  15.1 Mbits/sec    0    448 KBytes
[  4]   5.00-6.00   sec  1.94 MBytes  16.3 Mbits/sec    0    532 KBytes
[  4]   6.00-7.00   sec  1.88 MBytes  15.8 Mbits/sec    0    626 KBytes
[  4]   7.00-8.00   sec  2.00 MBytes  16.8 Mbits/sec    0    706 KBytes
[  4]   8.00-9.00   sec  2.01 MBytes  16.9 Mbits/sec    0    796 KBytes
[  4]   9.00-10.00  sec  1.88 MBytes  15.8 Mbits/sec    0    880 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  19.1 MBytes  16.0 Mbits/sec    0             sender
[  4]   0.00-10.00  sec  18.8 MBytes  15.8 Mbits/sec                  receiver

iperf Done.
------------------------------------------------------------------------------------------

 

 

thanks for your help

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15 Mbits/sec is a bit low ... raw speed highly depends on circumstances: distance, antennas, router, interference with other stations, ... I can achieve around 45Mbit/sec with exactly the same chip, but with a normal antenna on both sides, 15-20m distance, one concrete wall and zero radio smog (rural area).

 

It's not a problem of the chip, board or software, but your setup. Small chances are also that there are some bad contacts on the connector, bad antenna cable, ...

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I used the antennas of my wifi router and I got that

----------------------------------------------------------------------------------------------------------------

root@nanopiair:~# iperf3 -c 192.168.42.1
Connecting to host 192.168.42.1, port 5201
[  4] local 192.168.42.113 port 56232 connected to 192.168.42.1 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  4.31 MBytes  36.2 Mbits/sec    0    215 KBytes
[  4]   1.00-2.00   sec  4.45 MBytes  37.3 Mbits/sec    0    420 KBytes
[  4]   2.00-3.00   sec  4.01 MBytes  33.6 Mbits/sec    0    591 KBytes
[  4]   3.00-4.00   sec  4.22 MBytes  35.4 Mbits/sec    0    790 KBytes
[  4]   4.00-5.00   sec  4.46 MBytes  37.4 Mbits/sec    0    991 KBytes
[  4]   5.00-6.00   sec  4.78 MBytes  40.1 Mbits/sec    0   1.16 MBytes
[  4]   6.00-7.00   sec  3.55 MBytes  29.8 Mbits/sec    0   1.36 MBytes
[  4]   7.00-8.00   sec  4.79 MBytes  40.2 Mbits/sec   16   1.35 MBytes
[  4]   8.00-9.00   sec  4.01 MBytes  33.6 Mbits/sec   35   1.13 MBytes
[  4]   9.00-10.00  sec  4.45 MBytes  37.3 Mbits/sec    0   1.24 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  43.0 MBytes  36.1 Mbits/sec   51             sender
[  4]   0.00-10.00  sec  42.2 MBytes  35.4 Mbits/sec                  receiver

iperf Done.
 

----------------------------------------------------------------------------------------------------

 

 

What you recommend me the best wifi antenna 

 

thanks .

 

 

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I got that With a distance of 6 meters and large antenna

------------------------------------------------------------------------------------------------

root@nanopiair:~# iperf3 -c 192.168.42.1
Connecting to host 192.168.42.1, port 5201
[  4] local 192.168.42.113 port 32819 connected to 192.168.42.1 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec   102 KBytes   834 Kbits/sec    1   22.6 KBytes
[  4]   1.00-2.00   sec  65.0 KBytes   533 Kbits/sec    0   28.3 KBytes
[  4]   2.00-3.00   sec   102 KBytes   834 Kbits/sec    3   25.5 KBytes
[  4]   3.00-4.00   sec   180 KBytes  1.47 Mbits/sec    0   28.3 KBytes
[  4]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec    1   28.3 KBytes
[  4]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec    1   28.3 KBytes
[  4]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec    0   28.3 KBytes
[  4]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec    1   28.3 KBytes
[  4]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec    0   28.3 KBytes
[  4]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec    0   28.3 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec   448 KBytes   367 Kbits/sec    7             sender
[  4]   0.00-10.00  sec   393 KBytes   322 Kbits/sec                  receiver

iperf Done.

 

--------------------------------------------------------------------------------------------------------

 


 

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If I assume your router is O.K. and all other devices perform normally than this indicates some failure, like a bad antenna, cold soldering ... not a problem which we could fix or assist. Do close inspection, change power supply - make sure it gives you enough current, check voltage drops, ... this kind of troubles can manifest in a strange manner.

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