Plugin that allows you to keep the device screen awake, i.e. prevent the screen from sleeping
flutter pub add flu_wake_lock
import 'package:flu_wake_lock/flu_wake_lock.dart';
// ...
FluWakeLock _fluWakeLock = FluWakeLock();
// The following line will enable the Android and iOS wakelock.
_fluWakeLock.enable();
// The next line disables the wakelock again.
_fluWakeLock.disable();