84 lines
2.7 KiB
Dart
84 lines
2.7 KiB
Dart
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import 'dart:async';
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import 'dart:io';
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import 'package:esense_flutter/esense.dart';
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import 'package:flutter/material.dart';
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import 'package:permission_handler/permission_handler.dart';
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class ESenseInput {
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static final instance = ESenseInput._();
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ESenseManager eSenseManager = ESenseManager('unknown');
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ValueNotifier<String> deviceStatus = ValueNotifier('');
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String eSenseDeviceName = '';
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bool connected = false;
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bool sampling = false;
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ESenseInput._() {
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_listenToESense();
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}
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Future<void> _askForPermissions() async {
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if (!Platform.isAndroid && !Platform.isIOS) return;
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if (!(await Permission.bluetoothScan.request().isGranted &&
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await Permission.bluetoothConnect.request().isGranted)) {
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print(
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'WARNING - no permission to use Bluetooth granted. Cannot access eSense device.');
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}
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// for some strange reason, Android requires permission to location for Bluetooth to work.....?
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if (Platform.isAndroid) {
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if (!(await Permission.locationWhenInUse.request().isGranted)) {
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print(
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'WARNING - no permission to access location granted. Cannot access eSense device.');
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}
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}
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}
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StreamSubscription _listenToESense() {
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// if you want to get the connection events when connecting,
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// set up the listener BEFORE connecting...
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return eSenseManager.connectionEvents.listen((event) {
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print('CONNECTION event: $event');
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// when we're connected to the eSense device, we can start listening to events from it
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// if (event.type == ConnectionType.connected) _listenToESenseEvents();
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connected = false;
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switch (event.type) {
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case ConnectionType.connected:
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deviceStatus.value = 'connected';
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connected = true;
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break;
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case ConnectionType.unknown:
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deviceStatus.value = 'unknown';
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break;
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case ConnectionType.disconnected:
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deviceStatus.value = 'disconnected';
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sampling = false;
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break;
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case ConnectionType.device_found:
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deviceStatus.value = 'device_found';
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break;
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case ConnectionType.device_not_found:
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deviceStatus.value = 'device_not_found';
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break;
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}
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});
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}
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Future<void> connectToESense(String deviceName) async {
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if (!connected) {
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await _askForPermissions();
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print('Trying to connect to eSense device namend \'$deviceName\'');
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eSenseDeviceName = deviceName;
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eSenseManager.deviceName = deviceName;
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connected = await eSenseManager.connect();
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print('Trying to connect to eSense device namend \'${eSenseManager.deviceName}\'');
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deviceStatus.value = connected ? 'connecting...' : 'connection failed';
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print(deviceStatus.value);
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}
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}
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}
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