bashscan

#!/bin/bash
get_config() {
iwconfig 2>&1 | sed -n -e 's/^.*Access Point: //p'
} #(bnbfreak, 2013)

get_rssi() {
iwconfig | awk -F'[ =]+' '/Signal level/ {print $7}'
} #(John, 2016)

while true; do
  date "+%T.%1N" | tee -a scan3.txt
  config=$(get_config)
  rssi=$(get_rssi)
  echo "$config" | tee -a scan3.txt
  echo "$rssi" | tee -a scan3.txt
  echo "" | tee -a scan3.txt
  sleep 1
done