HT40 configured, but android-apps say 20MHz

[lleachii]

@linuxuser

In the meantime I know, my phone can show 40MHz, I see it with foreign neighbour networks.

Did you review the discussion in the linked thread?

[INFO] 40MHz misconception on ath9k

I did. It shows 20Mhz. Apparently, because that's the rate of the client. Hence, the need for a Wifi Analyzer. [20180928_153811a]

[INFO] 40MHz misconception on ath9k

The "analyzer" apps on smartphones are based on the channel and bandwidth that the APs advertise in their beacon packets. They do not actually scan the spectrum, the drivers in the OS do not allow that. Also g, n and ac modulations are OFDM so they have their power rather evenly distributed "boxcar" style across the spectrum they occupy. Only b has a parabolic shape.

In your case, I'm not sure what the screenshot shows.

@linuxuser

I was asking for a command which displays the width of the wifi-networks.

The width of wifi-networks - can you be more specific with what you're asking?

On the OpenWrt; on the phone?

@linuxuser

Here you see 40MHz overlapped, but ok, if it doesn't work here I know now, I did not do a misconfiguration. It didn't work here with channel 6 and 11.

I'm not understanding your statement:

@linuxuser

config wifi-iface 'default_radio1'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option ssid 'bed0.4-2'
	option encryption 'psk2'
	option key '...'

config wifi-iface 'wpa3_radio1'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option ssid 'bed0.4-mix'
	option encryption 'sae-mixed'
	option key '...'
	option disabled '1'

• To be clear, we are discussing these radios, correct?
• We agree 2 cora's and 3 other SSIDs use "3 @ 40MHz" and channels 1 and 6
• and cablelink and another (I assume no SSID?) uses 11

I don't see space in the band for your "bed" SSIDs to Tx @ 40 MHz.

Edit, I know we're discussing the phone, I should more clearly say:

"I don't see space on the band for your phone to transmit at 40Mhz bandwidth to the 'bed' SSIDs on radio1"