Try different ports for web interface

main.py

@@ -91,14 +91,22 @@ def main():
         observer.stop()
     observer.join()
 
-
-if __name__ == '__main__':
+def run_api():
     host = '0.0.0.0'
     port = 3300
 
-    threading.Thread(target=app.run, kwargs={'host': host, 'port': port}).start()
-    print('Web interface listening on port:', port)
-    print('Try going to http://localhost:' + str(port))
+    while True:
+        print('Trying to run web interface on port:', port)
+        print('If it works, go to http://localhost:' + str(port))
+        try:
+            app.run(host=host, port=port)
+        except OSError:
+            print()
+            print('Error: Port already taken.')
+            port += 1
+
+if __name__ == '__main__':
+    threading.Thread(target=run_api).start()
     time.sleep(1)
 
     main()