#!/bin/bash
device=$(ip ad | awk '/^[0-9]+:/ { print $2 }' | sed 's/://' | gum choose)
sudo iw $device scan | 
        awk '/^BSS/ { print $2 }; /signal/ { print $2, $3, "\f" }' |
        sed 's/(on$//'
# each result will look like:
#   00:11:22:33:44:55
#   -72.00 dBm
# additionally, they will be separated by "\f" characters