I am using the latest 19.07.5 release on my TP-Link RE450(EU) V.1.0. I would like to use the auto feature for the channel selection to choose a 5 GHz channel.
I selected Germany as country but openwrt chooses to select channels > 140 which are not supported / allowed for unlicensed indoor use in Germany and which my clients do not find when searching for available network connections. How can I force openwrt to only choose channels <= 140 for 5GHz?
Thanks, but channels > 140 are only allowed for Short Range Devices with a maximum of 25mW and all my WLAN devices from different manufacturers only work up to channel 140 and do not find any networks operating above nor can I select channels > 140. So I would assume that in Germany WLAN supports only channels up to 140 and channels above it are only to be used by other network types (Bluetooth, NFC).
And still: why does openwrt choose channel 149 which is out of scope anyway because > 5,725 GHz
Maybe the whole problem is because you forgot to select the country code in advanced settings? 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.
Thanks for all the replies. Yes, Country Code is DE - Germany, I am on 80MHz bandwith and on "driver default" which is currently 26dBm. I was not aware that "Auto Channel" just picks the first available channel without any intelligence. I decided to manually select channel 128 and keep it that way.
In Germany, according to the Bundesnetzagentur, the ranges 5.150 MHz - 5.350 MHz and 5.470 MHz - 5.725 MHz must be used.
So Channel 144 would not be allowed anymore (5730 MHz is larger than 5725 MHz) , therefore also the combination Channel 132 with 80Mhz would not be allowed, do I see that correctly?