Slow network speed

Help and Support Vero 4K / Vero 4K +
1

Hi

I’ve just Replaced my PI2 in my bedroom with a Vero4k but im getting buffering on my HD films
So I thought I would check the transfer speeds with iperf
Both iperf tests are connecting to the PI3 downstairs that is wired to my router

This is from the Vero4k over WIFI

Client connecting to 192.168.0.2, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.0.3 port 46325 connected with 192.168.0.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec  2.38 MBytes  19.9 Mbits/sec
[  3]  1.0- 2.0 sec  2.75 MBytes  23.1 Mbits/sec
[  3]  2.0- 3.0 sec  3.38 MBytes  28.3 Mbits/sec
[  3]  3.0- 4.0 sec  3.00 MBytes  25.2 Mbits/sec
[  3]  4.0- 5.0 sec  3.62 MBytes  30.4 Mbits/sec
[  3]  5.0- 6.0 sec  1.39 MBytes  11.6 Mbits/sec
[  3]  6.0- 7.0 sec   855 KBytes  7.00 Mbits/sec
[  3]  7.0- 8.0 sec   856 KBytes  7.01 Mbits/sec
[  3]  8.0- 9.0 sec   460 KBytes  3.76 Mbits/sec
[  3]  9.0-10.0 sec   571 KBytes  4.68 Mbits/sec
[  3]  0.0-10.2 sec  19.2 MBytes  15.7 Mbits/sec

And the is from the PI2 over WIFI

Client connecting to 192.168.0.2, TCP port 5001
TCP window size: 43.8 KByte (default)
------------------------------------------------------------
[  3] local 192.168.0.7 port 43820 connected with 192.168.0.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec  4.00 MBytes  33.6 Mbits/sec
[  3]  1.0- 2.0 sec  5.00 MBytes  41.9 Mbits/sec
[  3]  2.0- 3.0 sec  4.88 MBytes  40.9 Mbits/sec
[  3]  3.0- 4.0 sec  5.25 MBytes  44.0 Mbits/sec
[  3]  4.0- 5.0 sec  4.00 MBytes  33.6 Mbits/sec
[  3]  5.0- 6.0 sec  4.88 MBytes  40.9 Mbits/sec
[  3]  6.0- 7.0 sec  4.12 MBytes  34.6 Mbits/sec
[  3]  7.0- 8.0 sec   896 KBytes  7.34 Mbits/sec
[  3]  8.0- 9.0 sec  1.50 MBytes  12.6 Mbits/sec
[  3]  9.0-10.0 sec  4.62 MBytes  38.8 Mbits/sec
[  3]  0.0-10.0 sec  39.1 MBytes  32.8 Mbits/sec

I know there isn’t must in it but i could watch my HD films with my PI2 over WIFI
But can’t with the Vero4k

Vero4k is in the same place the PI2 was the only conclusion i can come up with that my router isn’t 5g only 2.4g and the VEro4k works better with a 5g router
I can run a wire up stairs for more tests but it would only be for that as my Partner would got nuts to fine a cable running from downstairs to our bedroom

the Vero4k is up to date and I’ve also tried SMB and fstab to the PI3 downstairs

I’m not sure what else I’m missing to be more helpful sorry

2

The Pi2 doesn’t have a built-in WiFi, so you must have used an external adapter. If it has a large antenna it will often have a performance advantage over a device with a built-in antenna. You might also find that the Vero4K’s WiFi performance can be affected by the the orientation of the case.

Have you tried the WiFi adapter on the Vero4K?

Slight off-topic. It’s better to use iperf3, rather than iperf.

3

The usb WIFI adapter doesn’t have an antenna really, it is a tiny TP-Link Model: TP-WN725N
I’ve tried plugging it in but that doesn’t work i think the built in WIFI most be interfering with it and i’m not sure how to turn that off.

I’ll use iperf3 from now on
If i can’t get the Vero4k working upstairs then I’ll just move the PI3 upstairs and put the Vero4k downstairs in the living room that i can plug in to the router.

4

If I remember correctly, the 4K WiFi antenna is on the backside of the board. So try placing the 4K so the bottom is aimed to the router.

5

You can remove the dhd driver at boot time

sudo rmmod dhd

While that might be possible in /etc/rc.local, a generally better way is to blacklist the driver module by creating a file /etc/modprobe.d/blacklist.conf, if it doesn’t already exist, and adding the line

blacklist dhd

I’ve successfully tried the blacklist on my Vero4K but I’ll have to defer to @sam_nazarko for confirmation that it won’t have any adverse effects.

6

That should be fine.