5GHz channel selection in Germany

[lleachii]

@patrakov

The guess is that your router is capable of 30 dBm and defaults to the US country code, where 149 is indeed the lowest channel where this high transmit power is legal to use.

Actually, World (00) is a valid setting, and initiating Tx is not permitted on that country setting. Therefore, if World is set, you cannot be an AP. Nontheless, the OP noted:

@Geme

I selected Germany as country

Can we verify this?

Next...

Unless something has changed, per this:

5GHz auto channel issue

Your expectation: AUTO should search for a channel within the legally allowed range that is not croweded and provides best performance. Reality: "Auto" only selects the first available channel (as defined by the hardware constraints and legal limitations, not any more advanced channel survey) - not more, not less.

It should pick Channel 32.

@Geme

And still: why does openwrt choose channel 149 which is out of scope anyway because > 5,725 GHz

• That's the range in which DFS is required; not the top limit of the allow range - which I assume matches the rest of Europe. This makes the last channel 173.
• OpenWrt uses the same regdb as maintained upstream, so all devices using it behave in this manner.

Lastly, regdb:

country DE: DFS-ETSI
	(2400 - 2483.5 @ 40), (100 mW)
	(5150 - 5250 @ 80), (200 mW), NO-OUTDOOR, AUTO-BW, wmmrule=ETSI
	(5250 - 5350 @ 80), (100 mW), NO-OUTDOOR, DFS, AUTO-BW, wmmrule=ETSI
	(5470 - 5725 @ 160), (500 mW), DFS, wmmrule=ETSI
	# short range devices (ETSI EN 300 440-1)
	(5725 - 5875 @ 80), (25 mW)
	# 60 GHz band channels 1-4 (ETSI EN 302 567)
	(57000 - 66000 @ 2160), (40)

• please confirm if you are setting: 20, 40 or 80 MHz bandwidth
• please confirm your power setting