New drivers seem to solve this issue

[AlejandroFNadal]

I used the last version of this script, the last update. The script run, it asked for reboot, I did so, I tried to change then the antena's power. It did not work, it remained in 20 dBm. Finally, I found the last drivers for the Realtek wifi cards, and then switched antenas. That worked. Perhaps the script could, in the future, , update to the last drivers and change antennas automatically, and then, check the wifi's signal. Anyway, my problem is fixed in my notebook, this is just a recommendation. Thanks for all your work. https://github.com/lwfinger/rtlwifi_new here is the link to the latest wifi realtek drivers