flutterdartaccelerometerandroid-sensorsudpclient

how to get 100 accelerometer values per sec in flutter


I am new to flutter ,I am writing an app which stream values of accelerometer from my mobile to pc using UDP it is working but I am getting approximately 5 to 10 values per sec I want at least 100 accelerometer values per sec on my server here is the code that I wrote https://github.com/USAMAWIZARD/send-acc-with-udp-flutter what should I optimize in my code to get values.

import 'dart:convert';
import 'package:async/async.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:sensors/sensors.dart';
import 'package:easy_udp/easy_udp.dart';
import 'package:wifi/wifi.dart';

void main() {
  runApp(MaterialApp(home: Home()));
}

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  TextEditingController ipaddress = new TextEditingController();
  TextEditingController portno = new TextEditingController();
  String srcip;
  int desport;
  String desip;
  var socket;
  int i = 0;

  void initializer() async {
    print("values initialized");
    desip = ipaddress.text;
    srcip = await Wifi.ip;
    desport = int.parse(portno.text);
    socket = await EasyUDPSocket.bind(srcip, 8000);
  }

  void init() async {
    await initializer();
    accelerometerEvents.listen((AccelerometerEvent event) async {
      await socket.send(
          ascii.encode(event.toString() + i.toString()), desip, desport);
      // await socket.send(ascii.encode(i.toString()), desip, desport);

      print(i);
      i += 1;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('send udp data'),
        centerTitle: true,
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          TextField(
            controller: ipaddress,
            textAlign: TextAlign.left,
            decoration: InputDecoration(
              border: InputBorder.none,
              hintText: 'IP Address',
              hintStyle: TextStyle(color: Colors.grey),
            ),
          ),
          TextField(
            controller: portno,
            textAlign: TextAlign.left,
            decoration: InputDecoration(
              border: InputBorder.none,
              hintText: 'Port NO',
              hintStyle: TextStyle(color: Colors.grey),
            ),
          ),
          TextButton(
              child: Text("start sending"),
              onPressed: () async => {
                    init(),
                  })
        ],
      ),
    );
  }
}


Solution

  • I ended up using a different library which provide a parameter called interval i have set that parameter to Sensors.SENSOR_DELAY_FASTEST and it is giving me aproximatly 100 values per sec

    import 'dart:convert';
    import 'package:async/async.dart';
    import 'package:flutter/material.dart';
    import 'package:flutter/widgets.dart';
    import 'package:flutter_sensors/flutter_sensors.dart';
    import 'package:easy_udp/easy_udp.dart';
    import 'package:wifi/wifi.dart';
    
    void main() {
      runApp(MaterialApp(home: Home()));
    }
    
    class Home extends StatefulWidget {
      @override
      _HomeState createState() => _HomeState();
    }
    
    class _HomeState extends State<Home> {
      TextEditingController ipaddress = new TextEditingController();
      TextEditingController portno = new TextEditingController();
      String srcip;
      int desport;
      String desip;
      var socket;
      int i = 0;
      var stream;
      void initializer() async {
        print("values initialized");
        desip = ipaddress.text;
        srcip = await Wifi.ip;
        desport = int.parse(portno.text);
        socket = await EasyUDPSocket.bind(srcip, 8000);
    
        stream = await SensorManager().sensorUpdates(
          sensorId: Sensors.ACCELEROMETER,
          interval: Sensors.SENSOR_DELAY_FASTEST,
        );
      }
    
      void init() async {
        await initializer();
        stream.listen((sensorEvent) async {
          await socket.send(
              ascii.encode(sensorEvent.datax.toString() + i.toString()),
              desip,
              desport);
          // await socket.send(ascii.encode(i.toString()), desip, desport);
    
          print(i);
          i += 1;
        });
      }
    
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text('send udp data'),
            centerTitle: true,
          ),
          body: Column(
            mainAxisAlignment: MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              TextField(
                controller: ipaddress,
                textAlign: TextAlign.left,
                decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'IP Address',
                  hintStyle: TextStyle(color: Colors.grey),
                ),
              ),
              TextField(
                controller: portno,
                textAlign: TextAlign.left,
                decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Port NO',
                  hintStyle: TextStyle(color: Colors.grey),
                ),
              ),
              TextButton(
                  child: Text("start sending"),
                  onPressed: () async => {
                        init(),
                      })
            ],
          ),
        );
      }
    }