Read data from Flutter via Bluetooth - flutter

Question

I am trying to get the data from my bluetooth device. My problem is with the Flutter code to get such data.
services/sensor.dart
import 'dart:async';
import 'dart:convert' show utf8;
import 'package:flutter/material.dart';
import 'package:flutter_blue/flutter_blue.dart';
import 'package:minertti/main.dart';
class SensorPage extends StatefulWidget {
const SensorPage({Key? key, required this.device}) : super(key: key);
final BluetoothDevice device;
#override
_SensorPageState createState() => _SensorPageState();
}
class _SensorPageState extends State<SensorPage> {
String service_uuid = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E";
String charaCteristic_uuid = "6E400003-B5A3-F393-E0A9-E50E24DCCA9E";
late bool isReady;
late Stream<List<int>> stream;
late List _temphumidata;
double _charge = 0;
double _data_1 = 0;
double _data_2 = 0;
#override
void initState() {
super.initState();
super.initState();
isReady = false;
connectToDevice();
}
void dispose() {
widget.device.disconnect();
super.dispose();
}
connectToDevice() async {
if (widget.device == null) {
_pop();
return;
}
new Timer(const Duration(seconds: 15), () {
if (!isReady) {
disconnectFromDevice();
_pop();
}
});
await widget.device.connect();
discoverServices();
}
disconnectFromDevice() {
if (widget.device == null) {
_pop();
return;
}
widget.device.disconnect();
}
discoverServices() async {
if (widget.device == null) {
_pop();
return;
}
List<BluetoothService> services = await widget.device.discoverServices();
services.forEach((service) {
if (service.uuid.toString().isNotEmpty) {
service.characteristics.forEach((characteristic) {
if (characteristic.uuid.toString().isNotEmpty) {
characteristic.setNotifyValue(!characteristic.isNotifying);
stream = characteristic.value;
setState(() {
isReady = true;
});
}
});
}
});
if (!isReady) {
_pop();
}
}
_pop() {
Navigator.of(context).pop(true);
}
String _dataParser(List<int> dataFromDevice) {
return utf8.decode(dataFromDevice);
}
#override
Widget build(BuildContext context) {
return Scaffold(
// appBar: AppBar(
// title: Text('dht11 Sensor'),
// ),
body: Container(
child: !isReady
? Center(
child: Text(
"Waiting...",
style: TextStyle(
fontSize: 24, color: Color.fromARGB(255, 0, 0, 0)),
),
)
: Container(
child: StreamBuilder<List<int>>(
stream: stream,
builder: (BuildContext context,
AsyncSnapshot<List<int>> snapshot) {
if (snapshot.hasError)
return Text('Error: ${snapshot.error}');
if (snapshot.connectionState == ConnectionState.active) {
var data = snapshot.data as List<int>;
var currentValue = _dataParser(data);
print("REALDATA: $data");
_temphumidata = currentValue.split(",");
//_charge = double.parse('${_temphumidata[0]}');
//_data_1 = double.parse('${_temphumidata[1]}');
//_data_2 = _temphumidata[2];
return DeviceScreen1(
device: widget.device,
//charge: _charge,
//data_2: _data_2,
//data_1: _data_1,
charge: 90,
data_1: "Data 1",
data_2: "Data 2");
} else {
return Text('Check the stream');
}
},
),
)),
);
}
}
var data = snapshot.data as List;
var currentValue = _dataParser(data);
They do not show values. But, from my Arduino I know that it does send/notify data. That is, my problem is with reading and obtaining said data.