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Yugesh-Kumar-SmarcnauseCloudyPadmal
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feat: ported barometer instrument (#2743)
Co-authored-by: Marc Nause <[email protected]> Co-authored-by: Padmal <[email protected]>
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7 files changed

+627
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lines changed

‎lib/constants.dart

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@@ -256,6 +256,13 @@ String lx = 'Lx';
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String maxScaleError = 'Max Scale';
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String lightSensorError = 'Light sensor error:';
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String lightSensorInitialError = 'Failed to initialize light sensor:';
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String barometerTitle = 'Barometer';
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String atm = 'atm';
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String barometerSensorInitialError = 'Failed to initialize barometer sensor:';
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String barometerSensorError = 'Barometer sensor error occurred';
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String barometerNotAvailable = 'Barometer sensor not available on this device';
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String meterUnit = 'm';
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String altitudeLabel = 'Altitude';
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String soundMeterError = 'Sound sensor error:';
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String soundMeterInitialError = 'Sound sensor initialization error:';
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String db = 'dB';

‎lib/main.dart

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@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
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import 'package:pslab/providers/board_state_provider.dart';
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import 'package:pslab/providers/locator.dart';
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import 'package:pslab/view/accelerometer_screen.dart';
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import 'package:pslab/view/barometer_screen.dart';
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import 'package:pslab/view/connect_device_screen.dart';
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import 'package:pslab/view/faq_screen.dart';
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import 'package:pslab/view/gyroscope_screen.dart';
@@ -59,6 +60,7 @@ class MyApp extends StatelessWidget {
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'/gyroscope': (context) => const GyroscopeScreen(),
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'/roboticArm': (context) => const RoboticArmScreen(),
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'/luxmeter': (context) => const LuxMeterScreen(),
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'/barometer': (context) => const BarometerScreen(),
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'/soundmeter': (context) => const SoundMeterScreen(),
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},
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);

‎lib/providers/barometer_state_provider.dart

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@@ -0,0 +1,164 @@
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import 'dart:async';
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import 'dart:math';
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import 'package:fl_chart/fl_chart.dart';
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import 'package:flutter/material.dart';
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import 'package:pslab/others/logger_service.dart';
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import 'package:sensors_plus/sensors_plus.dart';
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import 'package:flutter/foundation.dart';
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import 'package:pslab/constants.dart';
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class BarometerStateProvider extends ChangeNotifier {
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double _currentPressure = 0.0;
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StreamSubscription? _barometerSubscription;
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Timer? _timeTimer;
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final List<double> _pressureData = [];
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final List<double> _timeData = [];
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final List<FlSpot> pressureChartData = [];
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double _startTime = 0;
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double _currentTime = 0;
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final int _maxLength = 50;
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double _pressureMin = 0;
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double _pressureMax = 0;
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double _pressureSum = 0;
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int _dataCount = 0;
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bool _sensorAvailable = false;
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Function(String)? onSensorError;
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void initializeSensors({Function(String)? onError}) {
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onSensorError = onError;
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try {
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_startTime = DateTime.now().millisecondsSinceEpoch / 1000.0;
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_timeTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
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_currentTime =
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(DateTime.now().millisecondsSinceEpoch / 1000.0) - _startTime;
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if (_sensorAvailable) {
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_updateData();
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}
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notifyListeners();
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});
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Timer sensorTimeout = Timer(const Duration(seconds: 3), () {
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if (!_sensorAvailable) {
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_handleSensorError(barometerSensorError);
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}
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});
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_barometerSubscription = barometerEventStream().listen(
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(BarometerEvent event) {
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_currentPressure = event.pressure / 1013.25;
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if (!_sensorAvailable) {
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_sensorAvailable = true;
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sensorTimeout.cancel();
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}
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notifyListeners();
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},
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onError: (error) {
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logger.e("$barometerSensorError $error");
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sensorTimeout.cancel();
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_handleSensorError(error);
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},
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cancelOnError: false,
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);
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} catch (e) {
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logger.e("$barometerSensorInitialError $e");
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_handleSensorError(e);
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}
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}
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void _handleSensorError(dynamic error) {
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_sensorAvailable = false;
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onSensorError?.call(barometerNotAvailable);
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logger.e("$barometerSensorError $error");
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}
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void disposeSensors() {
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_barometerSubscription?.cancel();
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_timeTimer?.cancel();
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}
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@override
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void dispose() {
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disposeSensors();
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super.dispose();
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}
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void _updateData() {
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if (!_sensorAvailable) return;
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final pressure = _currentPressure;
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final time = _currentTime;
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_pressureData.add(pressure);
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_timeData.add(time);
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_pressureSum += pressure;
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_dataCount++;
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if (_pressureData.length > _maxLength) {
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final removedValue = _pressureData.removeAt(0);
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_timeData.removeAt(0);
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_pressureSum -= removedValue;
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_dataCount--;
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}
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if (_pressureData.isNotEmpty) {
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_pressureMin = _pressureData.reduce(min);
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_pressureMax = _pressureData.reduce(max);
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}
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pressureChartData.clear();
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for (int i = 0; i < _pressureData.length; i++) {
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pressureChartData.add(FlSpot(_timeData[i], _pressureData[i]));
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}
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notifyListeners();
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}
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double _pressureToAltitude(double pressureAtm) {
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const double seaLevelPressureAtm = 1.0;
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const double temperatureK = 288.15;
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const double lapseRate = 0.0065;
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const double gasConstant = 287.05;
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const double gravity = 9.80665;
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if (pressureAtm <= 0) return 0.0;
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double altitude = (temperatureK / lapseRate) *
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(1 -
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pow(pressureAtm / seaLevelPressureAtm,
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(gasConstant * lapseRate) / gravity));
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return altitude;
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}
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double getCurrentPressure() => _currentPressure;
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double getMinPressure() => _pressureMin;
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double getMaxPressure() => _pressureMax;
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double getAveragePressure() =>
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_dataCount > 0 ? _pressureSum / _dataCount : 0.0;
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double getCurrentAltitude() => _pressureToAltitude(_currentPressure);
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double getMinAltitude() =>
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_pressureMin > 0 ? _pressureToAltitude(_pressureMin) : 0.0;
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double getMaxAltitude() =>
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_pressureMax > 0 ? _pressureToAltitude(_pressureMax) : 0.0;
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double getAverageAltitude() => _pressureToAltitude(getAveragePressure());
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double getMaxAltitudeForChart() =>
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_pressureMax > 0 ? _pressureToAltitude(0) : 10000.0;
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double getMinAltitudeForChart() =>
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_pressureMin > 0 ? _pressureToAltitude(_pressureMax * 1.1) : 0.0;
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double getAltitudeInterval() {
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double maxAlt = getMaxAltitudeForChart();
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return maxAlt > 0 ? (maxAlt / 5) : 2000;
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}
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List<FlSpot> getPressureChartData() => pressureChartData;
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int getDataLength() => pressureChartData.length;
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double getCurrentTime() => _currentTime;
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double getMaxTime() => _timeData.isNotEmpty ? _timeData.last : 0;
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double getMinTime() => _timeData.isNotEmpty ? _timeData.first : 0;
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double getTimeInterval() {
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if (_currentTime <= 10) return 2;
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if (_currentTime <= 30) return 5;
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return 10;
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}
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bool get sensorAvailable => _sensorAvailable;
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}

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