CZI_presence_detector/scanner/scan.sh

#!/bin/bash

adapter=wlan0
conn_test_url=http://www.google.com

restart_network() {
  systemctl restart wpa_supplicant
}

# Check for root privileges
if [ "$(id -u)" != "0" ]
then
    >&2 echo "Quitting, this script has to be run as root!"
    exit 1
fi

# Activate Monitor mode
trackerjacker --monitor-mode-on -i $adapter

# Run scan
timeout 60 trackerjacker -i $adapter --map

# Deactivate Monitor mode
trackerjacker --monitor-mode-off -i $adapter

# Test network & try to restart if it fails
for i in 1 2 3 4 5
do
  sleep 10
  wget -q --spider $conn_test_url && break

  # no internet connection
  echo "No internet - restarting network"
  restart_network
done

# Network restarted up to 5 times, last test for connectivity
wget -q --spider $conn_test_url

if [ $? -eq 0 ]; then
    # Filter & upload results
    python upload.py
else
    echo "ERROR: no network connection"
fi

# Remove old scan results
rm wifi_map.yaml