Can't set 2.4GHz WiFi channel width to 40MHz in LuCI for OpenWrt One running firmware v24.10-rc5

Installing and Using OpenWrt Network and Wireless Configuration
1

I just got my OpenWrt One and it's running OpenWrt 24.10.0-rc5. I set the channel width to 40MHz for the 2.4GHz WiFi then save & apply. When I scanning for this AP it shows it's 20MHz channel, I have to use this command to somehow force it to 40MHz:

iw dev phy0-ap0 set freq 2412 HT40;

Since I live in a place where 2.4GHz WiFi are congested, is this the expected behaviour?

2

Yes, that's correct.

2.4 GHz has to be completely clear to enter 40 MHz mode.

3

check "Force 40mhz" in the AP settings (2nd tab on top)

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4
  • I asume the OP already did that and was asking why it didn't [appear to] work - but excellent suggestion
  • That setting doesn't magically "un-congest" the channel to allow AP and client to both enter 40 MHz mode
5

Another point to add to your list is that most user devices will still connect at 20MHz mode, regardless, making it a pretty useless setting.

Where it does become useful is point-to-point/wds connections or a mesh backhaul, but that is a completely different story, particularly if 802.11ax is supported (HE40) with beamforming and 4 or more receive streams....

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