fix in frequency

lib/datacollection/measurements_collector.dart

@@ -91,7 +91,7 @@ class MeasurementsCollector {
         GloveMeasurement gloveMeasurement =
             GloveMeasurement.fromFingerMeasurementsList(
                 parsedMeasurements.eventNumber,
-                parsedMeasurements.millis,
+                parsedMeasurements.timestampMillis,
                 deviceId,
                 parsedMeasurements.values);
         // developer.log('map to -> ${gloveMeasurement.toJson().toString()}');
@@ -138,8 +138,8 @@ class MeasurementsCollector {
       return null;
     }
     int eventNum = int.parse(fingerMeasurements.removeAt(0));
-    double millis = double.parse(fingerMeasurements.removeAt(0));
-    return _ParsedMeasurements(eventNum, millis,  fingerMeasurements);
+    int timestampMillis = int.parse(fingerMeasurements.removeAt(0));
+    return _ParsedMeasurements(eventNum, timestampMillis,  fingerMeasurements);
   }
 
   void _notifyListeners(GloveMeasurement measurement) {
@@ -151,10 +151,10 @@ class MeasurementsCollector {
 
 class _ParsedMeasurements {
   final int eventNumber;
-  final double millis;
+  final int timestampMillis;
   final List<String> values;
 
-  _ParsedMeasurements(this.eventNumber, this.millis, this.values);
+  _ParsedMeasurements(this.eventNumber, this.timestampMillis, this.values);
 
   @override
   String toString() {

lib/datacollection/storage.dart

@@ -71,7 +71,7 @@ class DeviceMeasurementsFile {
       String deviceName, String deviceId, String word) async {
     var creationDate = DateTime.now();
     SensorMeasurements json = new SensorMeasurements(
-        deviceName, deviceId, word,  <List<double>>[], <double>[]);
+        deviceName, deviceId, word,  <List<double>>[], <int>[]);
     String datetimeStr = format(creationDate);
     var filename = "${deviceName.substring(0, 1)}_${word}_$datetimeStr";
     var file = await new GloveEventsStorage().createFile(filename);
@@ -153,11 +153,11 @@ class SensorMeasurements {
   final String deviceName;
   final String deviceId;
   final String word;
-  final List<double> millis;
+  final List<int> timestamps;
   final List<List<double>> values;
 
   SensorMeasurements(this.deviceName, this.deviceId, this.word,this.values,
-     this.millis);
+     this.timestamps);
 
   bool add(GloveMeasurement gloveMeasurement) {
     if (gloveMeasurement.deviceId != this.deviceId) {
@@ -171,7 +171,7 @@ class SensorMeasurements {
     measurementList.addAll(extractFingerMeasurement(gloveMeasurement.middle));
     measurementList.addAll(extractFingerMeasurement(gloveMeasurement.index));
     this.values.add(measurementList);
-    this.millis.add(gloveMeasurement.millis);
+    this.timestamps.add(gloveMeasurement.timestampMillis);
     return true;
   }
 
@@ -191,7 +191,7 @@ class SensorMeasurements {
 
   factory SensorMeasurements.fromJson(dynamic json) {
     List<List<double>> _values = <List<double>>[];
-    List<double> _millis = <double>[];
+    List<int> _timestamps = <int>[];
 
     if (json['values'] != null) {
       var jsonLists = json['values'] as List;
@@ -200,16 +200,16 @@ class SensorMeasurements {
         return valuesList.map((v) => v as double).toList();
       }).toList();
     }
-    if (json['millis'] != null) {
-      var jsonLists = json['millis'] as List;
-      _millis = jsonLists.map((v) => v as double).toList();
+    if (json['timestamps'] != null) {
+      var jsonLists = json['timestamps'] as List;
+      _timestamps = jsonLists.map((v) => v as int).toList();
     }
     return SensorMeasurements(
       json['device_name'] as String,
       json['device_id'] as String,
       json['word'] as String,
       _values,
-      _millis,
+      _timestamps,
     );
   }
 
@@ -219,7 +219,7 @@ class SensorMeasurements {
       'device_id': deviceId,
       'word': word,
       'values': values,
-      'millis': millis
+      'timestamps': timestamps
     };
   }
 }

lib/edgeimpulse/api_client.dart

@@ -22,8 +22,8 @@ class EdgeImpulseApiClient {
         iat:  datetime.toUtc().millisecondsSinceEpoch ~/1000.0// date when the file was created in seconds since epoch
         );
     double elapsedTimeSum = 0.0;
-    for(var i = sensorMeasurements.millis.length -1 ; i > 0 ; i--){
-      var elapsedTime = sensorMeasurements.millis[i] - sensorMeasurements.millis[i-1];
+    for(var i = sensorMeasurements.timestamps.length -1 ; i > 0 ; i--){
+      var elapsedTime = sensorMeasurements.timestamps[i] - sensorMeasurements.timestamps[i-1];
       elapsedTimeSum += elapsedTime ;
     }
     double averageIntervalInMilliseconds = elapsedTimeSum  / (sensorMeasurements.values.length * 1.0);

lib/model/glove_measurement.dart

@@ -34,18 +34,18 @@ class GloveMeasurement {
 
   final String deviceId;
   final int eventNum;
-  final double millis;
+  final int timestampMillis;
   final Finger thumb;
   final Finger index;
   final Finger middle;
   final Finger ring;
   final Finger pinky;
 
-  GloveMeasurement(this.deviceId, this.eventNum,this.millis,this.pinky, this.ring, this.middle, this.index, this.thumb);
+  GloveMeasurement(this.deviceId, this.eventNum,this.timestampMillis,this.pinky, this.ring, this.middle, this.index, this.thumb);
 
   GloveMeasurement.fromJson(Map<String, dynamic> json)
   :  deviceId = json['device_id'], eventNum = json['event_num'],
-        millis = json['millis'],
+        timestampMillis = json['timestamp_millis'],
         pinky = Finger.fromJson(json['pinky'] as Map<String, dynamic>),
         ring = Finger.fromJson(json['ring'] as Map<String, dynamic>),
         middle = Finger.fromJson(json['middle'] as Map<String, dynamic>),
@@ -54,7 +54,7 @@ class GloveMeasurement {
 
   Map<String, dynamic> toJson() => {
     'device_id': deviceId,
-    'millis': millis,
+    'timestampMillis': timestampMillis,
     'event_num': eventNum,
     'pinky' : pinky.toJson(),
     'ring': ring.toJson(),
@@ -64,7 +64,7 @@ class GloveMeasurement {
   };
 
 
-  static fromFingerMeasurementsList(int eventNum, double millis, String deviceId, List<String> fingerMeasurements) {
+  static fromFingerMeasurementsList(int eventNum, int timestampMillis, String deviceId, List<String> fingerMeasurements) {
     Map<String, Finger> measurementsMap = new Map();
 
     for (final item in fingerMeasurements) {
@@ -80,7 +80,7 @@ class GloveMeasurement {
     Finger? middle = measurementsMap[middleLetter];
     Finger? index = measurementsMap[indexLetter];
     Finger? thumb = measurementsMap[thumbLetter];
-    return new GloveMeasurement(deviceId, eventNum, millis, pinky!, ring!, middle!, index!, thumb!);
+    return new GloveMeasurement(deviceId, eventNum, timestampMillis, pinky!, ring!, middle!, index!, thumb!);
   }
 
   Finger getFinger(FingerValue fingerName) {

lib/pages/ble_data_collection_page.dart

@@ -77,7 +77,7 @@ class _BleDataCollectionState extends State<BleDataCollectionPage>
                 });
               }),
               DataVisualizer(
-                  key: Key("$_collections"), collector: _measurementsCollector),
+                  key: Key("$_collections-$_isRecording"), collector: _measurementsCollector),
               Expanded(
                   child: Align(
                       alignment: FractionalOffset.bottomCenter,
@@ -161,6 +161,7 @@ class _BleDataCollectionState extends State<BleDataCollectionPage>
   void _stopRecording(BluetoothBackend bluetoothBackend) async {
     developer.log('stopRecording');
     bluetoothBackend.sendStopCommand();
+
     _isRecording = false;
     showDialog(
         context: context,
@@ -313,10 +314,11 @@ class DataVisualizer extends StatefulWidget {
 class _DataVisualizerState extends State<DataVisualizer>
     with MeasurementsListener {
   final MeasurementsCollector collector;
+  Map<String, GloveStats> _stats;
+
+  _DataVisualizerState(this.collector):_stats = Map();
 
-  _DataVisualizerState(this.collector);
 
-  Map<String, GloveStats> _stats = Map();
 
   @override
   void initState() {
@@ -350,23 +352,39 @@ class _DataVisualizerState extends State<DataVisualizer>
     setState(() {
       if (!_stats.containsKey(measurement.deviceId)) {
         _stats[measurement.deviceId] = GloveStats();
-      } else {
-        _stats[measurement.deviceId]?.update(measurement.millis);
       }
+      _stats[measurement.deviceId]?.update(measurement.eventNum, measurement.timestampMillis);
     });
   }
 }
 
 class GloveStats {
-  double accumulatedTimeMs = 0;
-  int eventNumber = 0;
-
-  void update(double elapsedTimeMs) {
+  static const String TAG = 'GloveStats';
+  int initialMs = -1;
+  int accumulatedTimeMs = 1;
+  int eventNumber = 1;
+
+  void update(int gloveEventNum, int timestampMillis) {
+    if(this.initialMs < 0 ){
+      this.initialMs = timestampMillis;
+      developer.log("set initialMs -> $initialMs", name: TAG);
+    }
+    if(gloveEventNum != this.eventNumber ){
+      developer.log("se perdieron eventos ?", name: TAG);
+      developer.log("eventNumber: $eventNumber gloveEventNum: $gloveEventNum", name: TAG);
+    }
     eventNumber++;
-    accumulatedTimeMs = accumulatedTimeMs + elapsedTimeMs;
+    accumulatedTimeMs = timestampMillis;
   }
 
   double getFrequency() {
-    return 1000 * eventNumber / accumulatedTimeMs;
+    double elapsedTime = ((accumulatedTimeMs - initialMs) * 1.0);
+    developer.log("elapsedTime = $accumulatedTimeMs - $initialMs= $elapsedTime", name: TAG);
+    if(elapsedTime < 1){
+      return 0.0;
+    }
+    double frequency = 1000.0 * eventNumber / elapsedTime;
+    developer.log("frequency= 1000 * $eventNumber /$elapsedTime  = $frequency", name: TAG);
+    return frequency;
   }
 }

lib/pages/data_visualization_page.dart

@@ -196,7 +196,7 @@ class _MeasurementsChartState extends State<MeasurementsChart>
   @override
   void onMeasurement(GloveMeasurement measurement) {
     measurementsBuffer.add(measurement);
-    lastTimestampMs += measurement.millis;
+    lastTimestampMs += measurement.timestampMillis;
     Vector3 sensorValues = measurement.getFinger(finger).getSensorValues(sensor);
     _measurementsX.add(SeriesEntry(lastTimestampMs, sensorValues.getX()));
     _measurementsY.add(SeriesEntry(lastTimestampMs, sensorValues.getY()));

lib/pages/file_content_chart_page.dart

@@ -131,12 +131,12 @@ class _MeasurementsChartState extends State<MeasurementsChart> {
 
   @override
   Widget build(BuildContext context) {
-    var initialTimestamp = 0.0;
+    double initialTimestamp = 0.0;
     for (var i = 0; i < this._measurements.values.length; i++) {
       if (i == 0) {
-        initialTimestamp = this._measurements.millis[i];
+        initialTimestamp = this._measurements.timestamps[i] as double;
       }
-      var timestamp = (this._measurements.millis[i] - initialTimestamp);
+      var timestamp = (this._measurements.timestamps[i] - initialTimestamp);
       var fingerValues = getFingerValues(this._measurements.values[i]);
       var sensorValues = this.getSensorValues(fingerValues);
       _measurementsX.add(SeriesEntry(timestamp, sensorValues.getX()));