Try to restart network if it fails first time

README.md

@@ -8,9 +8,19 @@ Sets the wifi adapter into monitor mode, then listens to surrounding packets lis
 Shows the last update of the `upload.py` routine. It also allows to add identities by their name and mac and to delete identities by their mac. The mac addresses are hashed server-side and then stored into the world-accessible `identities.json`.
 
 ## Set-up
-Dependencies: Python3, trackerjacker (pip3), php (front-end)
+Dependencies: 
+- Scanner: Python3, trackerjacker (pip3)
+- Website: php
+
 Configs to change:
-- system-specific wifi commands in `scan.sh`
-- identities URL in `upload.py`
-- webhook URL and secret in `upload.py`
-- webhook secret in `public/update.php`
+- `scanner/scan.sh`:
+  - WiFi adapter name
+  - network restart routines
+- `scanner/upload.py`:
+  - URLs for webhook and identities
+  - webhook secret
+- `public/update.php`:
+  - webhook secret
+
+Put `scanner` onto the scanning device (e.g. Raspberry Pi) and put `scanner/scan.sh` into a cron job.
+Put `website` onto a php-capable webserver and point your domain to it.

scanner/scan.sh

@@ -1,6 +1,11 @@
 #!/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" ]
@@ -18,11 +23,26 @@ timeout 60 trackerjacker -i $adapter --map
 # Deactivate Monitor mode
 trackerjacker --monitor-mode-off -i $adapter
 
-# Wait for wifi to reconnect
-sleep 15
+# 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
 
-# Filter & upload results
-python upload.py
+  # 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