Poor Wi-Fi performance on 17.0.1 Stable (WRT1900ACS v2)

Hey guys, firstly I would like to thank you all for creating such an amazing OS for routers, I've used ddwrt (wrt54GL - still in use :smiley:) in the past but LEDE is so much cooler, I especially like how you can download packages through the gui and add functionality to your router.

Now for the reason I'm posting:

I seem to be getting poor performance on at least 2.4g but quite possibly also 5g. I have a wrt1900acs v2 with LEDE Reboot 17.01.0 r3205-59508e3 installed.

2.4g wont go past 54mbit no matter what I do and 5g seems to have connection issues, it takes a long time to connect but once it does it seems to run alright e.g. opening a 720p or 1080p video file over 5g network can take up to a minute on VLC media player, while browsing
reddit is fun on 5g icons take longer to appear etc.

Here is a picture of some connections so you can see my problem:

And here is my wireless config

config wifi-device 'radio0'
option type 'mac80211'
option hwmode '11a'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
option country 'AU'
option txpower '30'
option htmode 'VHT80'
option channel '153'
option distance '15'

config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option macaddr '62:38:e0:0d:cc:cf'
option ssid 'Rolandnetwork5g'
option key ''
option encryption 'psk2+ccmp'

config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11g'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
option txpower '20'
option htmode 'HT40'
option distance '15'
option channel '11'
option country 'AU'

config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option macaddr '62:38:e0:0d:cc:ce'
option ssid 'Rolandnetwork'
option wmm '0'
option key ''
option encryption 'psk2+ccmp'

I'm in Australia btw if that helps. Any and all help appreciated, thanks guys :slight_smile:

just did a speed test using a nexus 5 on 5g, about 10 meters away from router through a couple of walls and got 8mbps, on 2.4g got 12mbps

Remove option distance '15' and try again

Thanks Shogo, I've tried that just now and there is no noticeable difference, 2.4g is still stuck at 54mb/s

try the custom builds here and report back

Build for WRT3200ACM (Discontinued)

Komawoyo, I'm getting the error "The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform." Whenever I try to use a sysupgrade file to update to one of the custom builds (stable and beta)

Komawoyo, im an idiot and tried to flash the wrong img, I've installed the latest stable and no change to wi-fi performance. Should I try the betas?

Try these settings:

config wifi-device 'radio0'
    option type 'mac80211'
    option hwmode '11a'
    option path 'soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
    option country 'AU'
    option txpower '20'
    option htmode 'VHT80'
    option channel '44'

config wifi-device 'radio1'
   option type 'mac80211'
   option hwmode '11g'
   option path 'soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
   option txpower '20'
   option htmode 'HT40'
   option channel '11'
   option country 'AU'
   option noscan '1'

It'd be better to set both wifi txpower to 17. And on 5GHz try to avoid DFS channel :grin: it helps for me :grin:

Thanks danhuy1994, your 5g tweaks have helped :slight_smile: the signal is 10dbm better now! As for the 2.4g how do i go about setting noscan to 1 ? Do i have to open the .tar.gz and manually do it myself then re upload?

Just edit in /etc/config/wireless after you flashed firmware :grin:

I'm gonna look like a massive noob for asking this but how do i do that danghuy1994? do i have to use putty and ssl in? been like 10 years since ive used putty lol

SSL in to the router and then edit the file using vi or similar.

1 Like

Use PuTTY (or WinSCP) if you're using Windows (or just SSH to it on Linux) then use uci to do that :grin: Like this:
> uci set wireless.@wifi-device[1].noscan=1
> uci commit wireless