StatusChecker.dart

Purpose 

StatusChecker.dart monitors device connection status and data reporting intervals for all sensor types (MetaWear, Sensoria, SmartBand). It also checks battery state and raises notifications when delays or failures are detected.

Dependencies 

import 'package:flutter/services.dart';
import '../enums/device_connection_status.dart';
import '../Api/SmartBandApi.dart';
import 'Uploader.dart';
import 'NotificationHandler.dart';
import '../Api/MetaWearApi.dart';
import '../Api/SensoriaApi.dart';
import 'package:battery_plus/battery_plus.dart';

Uses platform channels, BLE APIs, custom logic modules (Uploader, NotificationHandler), and battery info.

Key Fields 

Platform Channels 

MethodChannel metaWearChannel = MethodChannel('com.example.healthywear/metawear');
MethodChannel sensoriaChannel = MethodChannel('com.example.healthywear/sensoria');

Enables communication with native platform code for each device family.

Notification Handler 

final notificationHandler = NotificationHandler();

Handles user alerts based on connection issues or data delays.

Battery Monitoring 

Battery _battery = Battery();

Reads the current battery level from the device.

Device Connection Status Maps 

Map<int, DeviceConnectionStatus> metaWearStatuses = {};
Map<int, DeviceConnectionStatus> sensoriaStatuses = {};
Map<int, DeviceConnectionStatus> smartbandstatuse = {};

Tracks BLE connection state by device index.

Delay Threshold Configuration 

Delay parameters define initial tolerance and expected update intervals for:

MetaWear: SensorFusion, Temperature, AmbientLight, WriteFile, Battery
Sensoria: Motion, Battery, File
SmartBand: HR, BP, SpO2, Steps, Sleep

Each type has its own:

int Allowed_initialDelayMinutes_*
int Allowed_updateIntervalMinutes_*

These values are used to assess if data streams are timely or delayed.

Static Flags and Variables 

static Map<int, DateTime> deviceConnectedTime = {};
static bool isSmartBandConnected = false;
static bool isMetaWearError = false;

Used globally to record device states and health metrics.

Responsibilities 

Collect time series connection states.
Monitor for missed data uploads or sensor failures.
Notify the user of failures using NotificationHandler.
Interface with native platform code using MethodChannel.

Usage 

Typically invoked periodically (e.g. in background task) to assess system health and take remedial actions.

This module is tightly integrated with:

BackgroundHandling.dart
Uploader.dart
NotificationHandler.dart