Linksys MR8300 Radio0 help

Hey all,
Im new to OpenWrt and I'm having some issues with Radio0 on my router( Qualcomm Atheros QCA9886 802.11nac)...

No matter what country code, channel, or transmit power i set the signal always stays at 0dBm and i don't see the ssid on any device, even with all driver default settings.

If possible could those who have the same router give me some guidance, i have already tried researching on the forums for possible fixes but none seem to have helped.

its only Radio0 that i have the issue with, Radios 1 and 2( Qualcomm Atheros IPQ4019) are working flawlessly with driver default country code and power settings

That just means no client is currently connected, so no way to provide a(n aggregate) reading.

Hmmm then how come i dont see its SSID at all?

Not all clients support DFS channels either.

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Fair point, however when i had the OEM software there was a hidden network on channel 100 that if i provided the ssid and pass it would connect

also i should ask is there any way to then test on OpenWrt if the network is "working" but i just cant use it?

So bassically Radio0 is useless for clients that dont support DFS channels?

I guess that would be by design as that radio is most likely the radio used for the "mesh system"

Well, radio0 can only do channels above ch100, which are DFS-only (apart from the relatively recent addition of short-range devices, ch149+ or 6 GHz, which is a totally different topic altogether - but if your clients don't support DFS, they won't know about those either), if your clients don't support that, they won't be able to use this radio0. That doesn't make radio0 useless, especially semi-recent clients shouldn't have a problem using DFS channels either - but older ones may have problems.

Another aspect to consider, the higher the frequency, the harder it gets for the signal to penetrate walls and ceilings - meaning radio2's signal may be perceived as stronger (and therefore be preferred by the client) than that of radio0 from the next room.

Kind of, these upper (DFS-) channels are indeed primarily used by the wireless backhaul, just because of maximum client compatibility for the front-haul.

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Alright that just about clears it all up then the newest clients i have in my house is an ipad from 2021 and a lower end samsung a22 from 2021 which at least on the phone dont pick up channels above 100

Thanks for the fast support :smiley: and happy new year

What i had to do to make Apple devices connect on my wpa2 wifi:

 wireless.mywifi.dtim_period='3'
 wireless.mywifi.wpa_group_rekey='3600'

PS: check output of

iw reg get

and

`iwinfo radio0 freq
5.180 GHz (Channel 36)

  • 5.200 GHz (Channel 40)
    5.220 GHz (Channel 44)
    ....`

It does look like my ipad can connect to the lower channel 5ghz on radio2 but i have not seen it try use radio0

Here are the outputs of the commands

iw reg get:

country GB: DFS-ETSI
        (2400 - 2483 @ 40), (N/A, 20), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
        (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 26), (0 ms), DFS
        (5725 - 5850 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
        (5925 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
        (57000 - 71000 @ 2160), (N/A, 40), (N/A)

phy#2
country GB: DFS-ETSI
        (2400 - 2483 @ 40), (N/A, 20), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
        (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 26), (0 ms), DFS
        (5725 - 5850 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
        (5925 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
        (57000 - 71000 @ 2160), (N/A, 40), (N/A)

phy#1
country GB: DFS-ETSI
        (2400 - 2483 @ 40), (N/A, 20), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
        (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 26), (0 ms), DFS
        (5725 - 5850 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
        (5925 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
        (57000 - 71000 @ 2160), (N/A, 40), (N/A)

phy#0
country GB: DFS-ETSI
        (2400 - 2483 @ 40), (N/A, 20), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
        (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 26), (0 ms), DFS
        (5725 - 5850 @ 80), (N/A, 23), (N/A), NO-OUTDOOR
        (5925 - 6425 @ 160), (N/A, 23), (N/A), NO-OUTDOOR
        (57000 - 71000 @ 2160), (N/A, 40), (N/A)```


Output of iwinfo radio0 freq:

```root@OpenWrt-Linksys-MR8300:~# iwinfo radio0 freq
  5.500 GHz (Channel 100)
  5.520 GHz (Channel 104)
  5.540 GHz (Channel 108)
  5.560 GHz (Channel 112)
  5.580 GHz (Channel 116)
  5.600 GHz (Channel 120)
  5.620 GHz (Channel 124)
  5.640 GHz (Channel 128)
  5.660 GHz (Channel 132)
  5.680 GHz (Channel 136)
  5.700 GHz (Channel 140)
  5.720 GHz (Channel 144)
* 5.745 GHz (Channel 149)
  5.765 GHz (Channel 153)
  5.785 GHz (Channel 157)
  5.805 GHz (Channel 161)
  5.825 GHz (Channel 165)
root@OpenWrt-Linksys-MR8300:~#```

Hi.
I have this device and also had some issue with radio0. It's only a matter of DFS. If you manually set a channel, and that the device detects a radar, it will switch off radio0. This is part of specifications. So set the channel to auto, it will scan for radars and choose a channel out of radar range, possibily >=149.

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Alr will do that thanks :smiley:

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