vojtvop

As I wrote, other devices have absolutely no problem with it. My smartphone at the place OPi is located shows router signal strength of -60 dBm and "clean air", while at the router location there are only networks with very weak signal (lower than -85 dBm) receivable. The problem is not that OPi can't use full bandwidth. The problem is OPi is not able to connect, so I must set router to 20 MHz or use another AP. If OPi could work for example in older 802.11g mode in these cases so it could communicate with the router in compatibility mode even when 40 MHz was set, it would be sufficient for me.

Hello, my Orange Pi Lite WiFi (RTL 8189FTV) @ armbian 5.13 for OPi Lite works well on 20 MHz WiFi channels however is not usable on 40 MHz channels. The signal strength vary between 79 to 95 % on 20 MHz channel(s) while from -1 to 36 % on 40 MHz channel(s) and the connection is not possible. It seems the driver still needs some more tweak. Other WiFi devices have no problems with 40 MHz. The router I use to connect to is Asus RT-N18U (Broadcom BCM47081A0). Thank you for your efforts vojtvop