Hello @stuffen
Okay, you can try to setup the country to Switzerland, just follow the steps below.
$ echo ccode=SZ | sudo tee -a /lib/firmware/brcm/config_bcm43752a2_ag.txt
$ echo regrev=0 | sudo tee -a /lib/firmware/brcm/config_bcm43752a2_ag.txt
$ sync
Check the configuration file again, it should be like below:
$ cat /lib/firmware/brcm/config_bcm43752a2_ag.txt
wl_preinit=pm2_sleep_ret=2000
ccode=SZ
regrev=0
Then reboot the board.
$ sync
$ sudo reboot
Check the Wi-Fi country code:
$ dmesg | grep Country
[ 11.786510] [dhd] dhd_conf_set_country : Country code: SZ (SZ/0)
khadas@Khadas:~$
Check the channels, you will find 100-140 channels enabled.
$ sudo iw list | grep MHz
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
* 2484 MHz [14] (disabled)
short GI (80 MHz)
* 5170 MHz [34] (disabled)
* 5180 MHz [36] (30.0 dBm)
* 5190 MHz [38] (disabled)
* 5200 MHz [40] (30.0 dBm)
* 5210 MHz [42] (disabled)
* 5220 MHz [44] (30.0 dBm)
* 5230 MHz [46] (disabled)
* 5240 MHz [48] (30.0 dBm)
* 5260 MHz [52] (30.0 dBm) (no IR, radar detection)
* 5280 MHz [56] (30.0 dBm) (no IR, radar detection)
* 5300 MHz [60] (30.0 dBm) (no IR, radar detection)
* 5320 MHz [64] (30.0 dBm) (no IR, radar detection)
* 5500 MHz [100] (30.0 dBm) (no IR, radar detection)
* 5520 MHz [104] (30.0 dBm) (no IR, radar detection)
* 5540 MHz [108] (30.0 dBm) (no IR, radar detection)
* 5560 MHz [112] (30.0 dBm) (no IR, radar detection)
* 5580 MHz [116] (30.0 dBm) (no IR, radar detection)
* 5600 MHz [120] (30.0 dBm) (no IR, radar detection)
* 5620 MHz [124] (30.0 dBm) (no IR, radar detection)
* 5640 MHz [128] (30.0 dBm) (no IR, radar detection)
* 5660 MHz [132] (30.0 dBm) (no IR, radar detection)
* 5680 MHz [136] (30.0 dBm) (no IR, radar detection)
* 5700 MHz [140] (30.0 dBm) (no IR, radar detection)
* 5720 MHz [144] (disabled)
* 5745 MHz [149] (30.0 dBm)
* 5765 MHz [153] (30.0 dBm)
* 5785 MHz [157] (30.0 dBm)
* 5805 MHz [161] (30.0 dBm)
* 5825 MHz [165] (30.0 dBm)
As I can’t check these channel functions on my side, please check on your side and let us know whether it works.