flutter_ble_peripheral_central 0.0.5 
flutter_ble_peripheral_central: ^0.0.5 copied to clipboard
flutter_ble_peripheral_central plugin project.
//https://github.com/deokgyuhan/flutter_ble_peripheral_central/tree/master/example/lib
//example dependency => https://pub.dev/packages/permission_handler
import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_ble_peripheral_central/flutter_ble_peripheral_central.dart';
import 'package:permission_handler/permission_handler.dart';
void main() {
runApp(MaterialApp(home: HomeScreen()));
}
//HomeScreen
class HomeScreen extends StatelessWidget {
HomeScreen({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
'BLE Peripheral & Central',
style: TextStyle(fontSize: 27, fontWeight: FontWeight.bold,),
)
),
body: Column(
children: [
Text(
'Example',
style: TextStyle(fontSize: 40, fontWeight: FontWeight.bold,),
),
SizedBox(height: MediaQuery.of(context).size.height*0.4),
Center(
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton.icon(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return BLEPeripheralWidget();
}),
);
},
icon: Icon(
Icons.login_sharp,
size: MediaQuery.of(context).size.width * 0.07,
color: Colors.white
),
label: AnimatedDefaultTextStyle(
duration: const Duration(milliseconds: 50),
style: TextStyle(
color: Colors.white,
fontSize: MediaQuery.of(context).size.width * 0.05,
fontWeight: FontWeight.bold,
),
child: Text('BLE Peripheral View'),
),
style: ElevatedButton.styleFrom(
primary: Colors.black,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
padding: EdgeInsets.symmetric(
vertical: MediaQuery.of(context).size.height * 0.02,
horizontal: MediaQuery.of(context).size.width * 0.08,
),
),
),
SizedBox(height: 10,),
ElevatedButton.icon(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return BLECentralWidget();
}),
);
},
icon: Icon(
Icons.login_sharp,
size: MediaQuery.of(context).size.width * 0.07,
color: Colors.white
),
label: AnimatedDefaultTextStyle(
duration: const Duration(milliseconds: 50),
style: TextStyle(
color: Colors.white,
fontSize: MediaQuery.of(context).size.width * 0.05,
fontWeight: FontWeight.bold,
),
child: Text('BLE Central View '),
),
style: ElevatedButton.styleFrom(
primary: Colors.black,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
padding: EdgeInsets.symmetric(
vertical: MediaQuery.of(context).size.height * 0.02,
horizontal: MediaQuery.of(context).size.width * 0.08,
),
),
),
]
),
),
),
],
),
);
}
}
//BLEPeripheralWidget
class BLEPeripheralWidget extends StatefulWidget {
@override
_BLEPeripheralWidgetState createState() => _BLEPeripheralWidgetState();
}
class _BLEPeripheralWidgetState extends State<BLEPeripheralWidget> {
final _flutterBlePeripheralCentralPlugin = FlutterBlePeripheralCentral();
List<String> _events = [];
final _eventStreamController = StreamController<String>();
final _bluetoothState = TextEditingController();
final _advertisingText= TextEditingController();
final _readableText= TextEditingController();
final _indicateText= TextEditingController();
final _writeableText= TextEditingController();
bool _isSwitchOn = false;
final ScrollController _scrollController = ScrollController();
@override
void initState() {
super.initState();
_permissionCheck();
}
@override
void dispose() {
_eventStreamController.close();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
'BLE Peripheral View',
style: TextStyle(fontSize: 27, fontWeight: FontWeight.bold),
)
),
body: SingleChildScrollView(child: Column(
children: [
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Bluetooth State",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Container(
width: MediaQuery.of(context).size.width*0.6,
height: 45,
child: TextField(
controller: _bluetoothState,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: false,
),
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Advertising data",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.75,
height: 45,
child: TextField(
controller: _advertisingText,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: Platform.isIOS ? true : false,
),
),
SizedBox(width: 10),
Container(
width: MediaQuery.of(context).size.width*0.17,
height: 45,
child: Transform.scale(
scale: 1.3,
child: Switch(
value: _isSwitchOn,
activeColor: CupertinoColors.activeBlue,
onChanged: (value) {
setState(() {
_isSwitchOn = value;
});
if(_isSwitchOn) {
_bleStartAdvertising(_advertisingText.text, _readableText.text);
} else {
_bleStopAdvertising();
}
},
),
)
),
]),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Readable characteristic",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.67,
height: 45,
child: TextField(
controller: _readableText,
decoration: InputDecoration(
// hintText: 'Input indicate value',
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
),
),
SizedBox(width: 10,),
Container(
width: MediaQuery.of(context).size.width*0.25,
height: 45,
child:
ElevatedButton(
onPressed: () async {
_bleEditTextCharForRead(_readableText.text);
},
child: Text('Edit'),
),
),
]
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Indication",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.67,
height: 45,
child: TextField(
controller: _indicateText,
decoration: InputDecoration(
hintText: 'Input indicate value',
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
),
),
SizedBox(width: 10,),
Container(
width: MediaQuery.of(context).size.width*0.25,
height: 45,
child:
ElevatedButton(
onPressed: () async {
_bleIndicate(_indicateText.text);
},
child: Text('Send'),
),
),
]
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Writeable characteristic",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Container(
width: MediaQuery.of(context).size.width*0.6,
height: 45,
child: TextField(
controller: _writeableText,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: false,
),
),
),
],
)
),
Container(
child: Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Container(
width: double.infinity,
// height: double.infinity,
height: MediaQuery.of(context).size.height*0.32,
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
),
child:
ListView.builder(
controller: _scrollController,
itemCount: _events.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(
_events[index],
style: TextStyle(fontSize: 15,),
)
);
},
),
),
),
),
],
),
),
);
}
StreamSubscription<dynamic>? _eventSubscription;
void _bleStartAdvertising(String advertisingText, String readableText) async {
_clearLog();
_eventStreamController.sink.add('Starting...');
_eventSubscription = await _flutterBlePeripheralCentralPlugin
.startBlePeripheralService(advertisingText, readableText)
.listen((event) {
_eventStreamController.sink.add('-> '+event);
_addEvent(event);
print('----------------------->event: ' + event);
});
}
void _bleStopAdvertising() async {
await _flutterBlePeripheralCentralPlugin.stopBlePeripheralService();
}
void _bleEditTextCharForRead(String readableText) async {
await _flutterBlePeripheralCentralPlugin.editTextCharForRead(readableText);
}
void _bleIndicate(String sendData) async {
await _flutterBlePeripheralCentralPlugin.sendIndicate(sendData);
}
// add the event
void _addEvent(String event) {
setState(() {
_events.add(event);
});
Map<String, dynamic> responseMap = jsonDecode(event);
if (responseMap.containsKey('message')) {
String message = responseMap['message'];
print('Message: $message');
} else if(responseMap.containsKey('state')) {
setState(() {
_bluetoothState.text = responseMap['state'];
});
if (event == 'disconnected') {
_eventSubscription?.cancel();
}
} else if(responseMap.containsKey('onCharacteristicWriteRequest')) {
setState(() {
_writeableText.text = responseMap['onCharacteristicWriteRequest'];
});
} else {
print('Message key not found in the JSON response.');
}
// Scroll to the end of the list
_scrollController.jumpTo(_scrollController.position.maxScrollExtent);
}
// clear the log
void _clearLog() {
setState(() {
_events.clear();
});
}
void _permissionCheck() async {
if (Platform.isAndroid) {
var permission = await Permission.location.request();
var bleScan = await Permission.bluetoothScan.request();
var bleConnect = await Permission.bluetoothConnect.request();
var bleAdvertise = await Permission.bluetoothAdvertise.request();
var locationWhenInUse = await Permission.locationWhenInUse.request();
print('location permission: ${permission.isGranted}');
print('bleScan permission: ${bleScan.isGranted}');
print('bleConnect permission: ${bleConnect.isGranted}');
print('bleAdvertise permission: ${bleAdvertise.isGranted}');
print('location locationWhenInUse: ${locationWhenInUse.isGranted}');
}
}
}
//BLECentralWidget
class BLECentralWidget extends StatefulWidget {
@override
_BLECentralWidgetState createState() => _BLECentralWidgetState();
}
class _BLECentralWidgetState extends State<BLECentralWidget> {
final _flutterBlePeripheralCentralPlugin = FlutterBlePeripheralCentral();
List<String> _events = [];
final _eventStreamController = StreamController<String>();
var _lifecycleState = TextEditingController();
var _readableText= TextEditingController();
var _writeableText= TextEditingController();
var _indicateText= TextEditingController();
bool _isSwitchOn = false;
final ScrollController _scrollController = ScrollController();
@override
void initState() {
super.initState();
_permissionCheck();
}
@override
void dispose() {
_eventStreamController.close();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
'BLE Central View',
style: TextStyle(fontSize: 27, fontWeight: FontWeight.bold),
),
),
body: SingleChildScrollView(child: Column(
children: [
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Lifecycle State",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Container(
width: MediaQuery.of(context).size.width*0.6,
height: 45,
child: TextField(
controller: _lifecycleState,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: false,
),
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
// Text("Advertising data"),
// SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.75,
height: 45,
child: Padding(padding: EdgeInsets.symmetric(vertical: 8,),
child: Text(
'Scan & autoconnect',
style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
),),
),
SizedBox(width: 10),
Container(
width: MediaQuery.of(context).size.width*0.17,
height: 45,
child: Transform.scale(
scale: 1.3,
child: Switch(
value: _isSwitchOn,
activeColor: CupertinoColors.activeBlue,
onChanged: (value) {
setState(() {
_isSwitchOn = value;
});
if(_isSwitchOn) {
_bleScanAndConnect();
} else {
_bleDisconnect();
}
},
),
)
),
]),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Readable characteristic",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.67,
height: 45,
child: TextField(
controller: _readableText,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: false,
),
),
SizedBox(width: 10,),
Container(
width: MediaQuery.of(context).size.width*0.25,
height: 45,
child:
ElevatedButton(
onPressed: () async {
_bleReadCharacteristic();
},
child: Text('Read'),
),
),
]
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Writeable characteristic",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
width: MediaQuery.of(context).size.width*0.67,
height: 45,
child: TextField(
controller: _writeableText,
decoration: InputDecoration(
hintText: 'Write SendData',
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
),
),
SizedBox(width: 10,),
Container(
width: MediaQuery.of(context).size.width*0.25,
height: 45,
child:
ElevatedButton(
onPressed: () async {
_bleWriteCharacteristic(_writeableText.text);
},
child: Text('Write'),
),
),
]
),
),
],
)
),
Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
"Indication",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.bold),
),
SizedBox(height: 5),
SizedBox(
width: double.infinity,
child: Container(
width: MediaQuery.of(context).size.width*0.6,
height: 45,
child: TextField(
controller: _indicateText,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey),
),
contentPadding: EdgeInsets.symmetric(vertical: 10, horizontal: 12,),
),
enabled: false,
),
),
),
],
)
),
Container(
child: Padding(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10,),
child: Container(
width: double.infinity,
// height: double.infinity,
height: MediaQuery.of(context).size.height*0.32,
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
),
child:
ListView.builder(
controller: _scrollController,
itemCount: _events.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(
_events[index],
style: TextStyle(fontSize: 15,),
)
);
},
),
),
),
),
],
),
),
);
}
StreamSubscription<dynamic>? _eventSubscription;
void _bleScanAndConnect() async {
_clearLog();
_eventStreamController.sink.add('Starting...');
_eventSubscription = await _flutterBlePeripheralCentralPlugin
.scanAndConnect()
.listen((event) {
_eventStreamController.sink.add('-> '+event);
_addEvent(event);
print('----------------------->event: ' + event);
});
}
void _bleReadCharacteristic() async {
var result = await _flutterBlePeripheralCentralPlugin.bleReadCharacteristic();
setState(() {
_readableText.text = result!;
});
}
void _bleWriteCharacteristic(String sendData) async {
await _flutterBlePeripheralCentralPlugin.bleWriteCharacteristic(sendData);
}
void _bleDisconnect() async {
await _flutterBlePeripheralCentralPlugin.bleDisconnect();
}
// add the event
void _addEvent(String event) {
setState(() {
_events.add(event);
});
Map<String, dynamic> responseMap = jsonDecode(event);
if (responseMap.containsKey('message')) {
String message = responseMap['message'];
print('Message: $message');
} else if(responseMap.containsKey('state')) {
setState(() {
_lifecycleState.text = responseMap['state'];
});
if (event == 'disconnected') {
_eventSubscription?.cancel();
}
} else if(responseMap.containsKey('onCharacteristicChanged')) {
setState(() {
_indicateText.text = responseMap['onCharacteristicChanged'];
});
} else {
print('Message key not found in the JSON response.');
}
// Scroll to the end of the list
_scrollController.jumpTo(_scrollController.position.maxScrollExtent);
}
// clear the log
void _clearLog() {
setState(() {
_events.clear();
});
}
void _permissionCheck() async {
if (Platform.isAndroid) {
var permission = await Permission.location.request();
var bleScan = await Permission.bluetoothScan.request();
var bleConnect = await Permission.bluetoothConnect.request();
var bleAdvertise = await Permission.bluetoothAdvertise.request();
var locationWhenInUse = await Permission.locationWhenInUse.request();
print('location permission: ${permission.isGranted}');
print('bleScan permission: ${bleScan.isGranted}');
print('bleConnect permission: ${bleConnect.isGranted}');
print('bleAdvertise permission: ${bleAdvertise.isGranted}');
print('location locationWhenInUse: ${locationWhenInUse.isGranted}');
}
}
}Metadata
3
likes
130
pub points
52%
popularity
Publisher
unverified uploader
Metadata
flutter_ble_peripheral_central plugin project.
Repository (GitHub)
View/report issues
Documentation
License
MIT (LICENSE)
Dependencies
flutter, plugin_platform_interface
