esp_bluetooth_provisioning 1.0.1

Esp BLE provisioning package

example/lib/main.dart

import 'package:esp_bluetooth_provisioning/models/enums.dart';
import 'package:esp_bluetooth_provisioning/esp_bluetooth_provisioning.dart';
import 'package:esp_bluetooth_provisioning_example/POPDialog.dart';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:permission_handler/permission_handler.dart';


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

class MyApp extends StatefulWidget
{
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp>
{
  String _platformVersion = 'Unknown';
  ScaffoldFeatureController<SnackBar, SnackBarClosedReason> snackbar;
  PermissionStatus _locationPermissionStatus = PermissionStatus.unknown;
  final _formKey = GlobalKey<FormState>();
  var _scaffoldKey = GlobalKey<ScaffoldState>();
  BluetoothState state;
  bool isScanned =  false;
  bool isLoading = false;
  bool securityCheck = false;
  List<BleDevices> devices;
  String loading;
  String pin, ssid, password;
  StreamSubscription controller;

  bool obscureText;


  @override
  void initState()
  {
    super.initState();
    devices = [];
    loading = "";
    pin = "";
    ssid = "";
    password = "";
    obscureText = true;
    EspBleProvisioning().requestPermission();
    startListening();
    initPlatformState();
  }
  //
  // @override
  // void dispose() {
  //   /// cancel subscription
  //   controller?.cancel();
  //   super.dispose();
  // }

  Future<void> initPlatformState() async
  {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try
    {
      platformVersion = await EspBleProvisioning.platformVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
      print("Platform version : $_platformVersion" );
    });
  }

  //*******Listen for bluetooth state***********
  startListening() async
  {
    print("** Listening **");
    EspBleProvisioning().getBluetoothStateStream().listen((state) async
    {
      print("State *********** $state");
      if (this.mounted)
        setState(()
        {
          this.state = state;
        });
      if (state == BluetoothState.ON)
      {
        if (snackbar != null) {
          snackbar.close();
        }
        print("Bluetooth ON");
      } else if (state == BluetoothState.OFF)
      {
        showSnackBar("Please turn on bluetooth.");
      }
    });
  }

  //*******Scan for bluetooth device***********
  scanBleDevice()
  {
    setState(() {
      isLoading = true;
      loading = "Scanning bluetooth devices";
    });
    controller = EspBleProvisioning()
        .scanBluetoothDevice()
        .listen((value) async {
      setState(() {
        if(value.length > 0)
        {
          print("************DEVICE SCAN RESULT : $value");
          isScanned = true;
          isLoading = false;
          List names = [];
          devices.clear();
          for(int i=0; i < value.length; i++)
          {
            if(!names.contains(value[i].name))
            {
              devices.add(BleDevices(value[i].name, value[i].id));
            }
            names.add(value[i].name);
          }
        }
        else
        {
          isScanned = false;
          isLoading = false;
          showSnackBar("No devices found!");
        }
      });
    });
  }

  //*******Connect to bluetooth device***********
  connectBleDevice(String pin, int index)
  {
    setState(() {
      print("Connect to Device**************** ${devices[index].name}");
      loading = "Connecting to device";
      isLoading = true;
    });

    controller = EspBleProvisioning().connectToBluetoothDevice(devices[index].name, pin).listen((value) async
    {
      setState(() {
        if(value == "success")
        {
          print(value);
          isLoading = false;
          devices.clear();
          print("************security check completed");
        }
        else
        {
          isScanned = true;
          isLoading = false;
        }
      });

      _wifiDialog();

    });

    return true;
  }

  //*******Provision device***********
  provisionDevice(String ssid, String password)
  async {
    setState(() {
      isLoading = true;
      loading = "Provisioning device";
    });
    print("***********START WIFI PROVISIONING");
    EspBleProvisioning().startProvisioning(ssid, password).then((value) async {
      print("FrontEnd : $value");
      setState(() {
        isLoading = false;
        isScanned = false;
        devices.clear();
        print("Provision Status ----------> $value");
        // showSnackBar(value);
      });

      messageDialog(_getStatusFromKey(value), context);
      return true;


    });

  }



  void showSnackBar(message) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text(
        message,
        style: TextStyle(color: Colors.white, ),
      ),
      backgroundColor: Colors.black,
      action: SnackBarAction(
        label: 'Dismiss',
        textColor: Colors.red,
        disabledTextColor: Colors.white,
        onPressed: () {
          ScaffoldMessenger.of(context).hideCurrentSnackBar();
        },
      ),
    ));
  }


  void _showPOPDialog( BuildContext _context, int index) {
    showDialog(
        context: _context,
        builder: (BuildContext context) {
          return POPDialog(
            pin:"",
            onSubmit: (pin) {
              print('pin = $pin');
              connectBleDevice(pin, index);
            },
          );
        });
  }



  void _wifiDialog() {
    showDialog(
        context: context,
        builder: (BuildContext context) {
          return StatefulBuilder(builder: (BuildContext context, setState)
          {
            return AlertDialog(
              elevation: 5,
              backgroundColor: Colors.white,
              shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(10.0)), //this right here
              content: Container(
                height: 320,
                color: Colors.transparent,
                child: Padding(
                  padding: const EdgeInsets.all(20.0),
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      Text('Enter WiFi Credentials',
                          style: Theme
                              .of(context)
                              .textTheme
                              .bodyText2),
                      SizedBox(
                        height: 10.0,
                      ),
                      Padding(
                        padding: EdgeInsets.only(top:8.0, left: 8, right: 8),
                        child: Container(
                          height: 60,
                          margin: EdgeInsets.all(8),
                          child:  TextField(
                            decoration: InputDecoration(
                              border: OutlineInputBorder(),
                              labelText: 'ssid*',
                              hintText: 'ssid*',
                            ),
                            // controller: _currentController,
                            onChanged: (value) {
                              ssid = value;
                            },
                          ),
                        ),
                      ),
                      Container(
                        height: 60,
                        margin: EdgeInsets.only(top:8.0, left: 16, right: 16),
                        child:  TextField(
                          decoration: InputDecoration(
                            border: OutlineInputBorder(),
                            labelText: 'Password*',
                            hintText: 'Password*',
                            suffixIcon: IconButton(
                              onPressed: ()
                              {
                                setState(()
                                {
                                  obscureText = !obscureText;
                                });
                              },
                              icon: Icon(!obscureText ? Icons.visibility : Icons
                                  .visibility_off),
                            ),
                          ),
                          obscureText: obscureText,
                          onChanged: (value)
                          {
                            password = value;
                          },
                        ),
                      ),
                      SizedBox(
                        height: 10.0,
                      ),
                      SizedBox(
                        width: double.infinity,
                        height: 50.0,
                        child: MaterialButton(
                            child: Text('Provision'),
                            color: Colors.redAccent,
                            onPressed: () {
                              // if (_formKey.currentState.validate())
                              {
                                print('ssid =$ssid, password = $password');
                                provisionDevice(ssid, password);
                                Navigator.pop(context);
                                Navigator.pop(context);

                              }
                            }),
                      )
                    ],
                  ),
                ),
              ),
            );
          });

          //   WifiDialog(
          //   wifiName:"",
          //   onSubmit: (ssid, password) async {
          //     print('ssid =$ssid, password = $password');
          //     provisionDevice(ssid, password);
          //   },
          // );
        });
  }

  messageDialog(String message, BuildContext _context)
  {
    showDialog(
      barrierDismissible: true,
      context: _context,
      builder: (BuildContext context) {
        // Future.delayed(Duration(seconds: 5), () {
        //   Navigator.of(context).pop(true);
        // });
        return AlertDialog(
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(15.0),
          ),
          content:
          Stack(
            overflow: Overflow.visible,
            children: <Widget>[
              StatefulBuilder(
                builder: (BuildContext context, StateSetter alertState) {
                  return
                    Container(
                        child:
                        Column(
                          mainAxisAlignment: MainAxisAlignment.center,
                          crossAxisAlignment: CrossAxisAlignment.center,
                          mainAxisSize: MainAxisSize.min,
                          children: <Widget>[
                            Padding(
                              padding: EdgeInsets.only(left: 8.0),
                              child: Text(message, textAlign :TextAlign.center, style: TextStyle(fontFamily: "Montserrat",fontSize: 16.0, color: Colors.black,),),
                            ),
                            Padding(
                              padding: const EdgeInsets.only(top: 16),
                              child: Container(
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(15),
                                ),
                                child: ElevatedButton(
                                  onPressed: () {
                                    Navigator.pop(context);
                                  },
                                  child: Text("Ok", style: TextStyle(fontSize: 15, color: Colors.white),),
                                ),
                              ),
                            ),

                          ],
                        ));
                },
              ),
            ],
          ),
        );
      },
    );
  }


  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          // key: _scaffoldKey,
          appBar: AppBar(
            title: const Text('Esp Ble Provisioning'),
          ),
          body: !isLoading ? isScanned ? Container(
              padding: EdgeInsets.all(16),
              child: Column(
                children: [
                  Text("Select a device for provisioning",
                    style: TextStyle(color: Colors.black, fontWeight: FontWeight.bold, fontSize: 18),),
                  Padding(
                    padding: const EdgeInsets.only(top: 16.0),
                    child: ListView.builder(
                        shrinkWrap: true,
                        itemCount: devices.length,
                        itemBuilder: (_context, index) {
                          return GestureDetector(
                              onTap: () {
                                _showPOPDialog(context, index);
                              },
                              child: Container(
                                width: double.infinity,
                                child: Column(
                                  mainAxisAlignment: MainAxisAlignment.start,
                                  crossAxisAlignment: CrossAxisAlignment.start,
                                  children: [
                                    Padding(
                                      padding: const EdgeInsets.all(4.0),
                                      child: Text(devices[index].name,
                                        style: TextStyle(fontSize:16, color: Colors.black),),
                                    ),
                                    Padding(
                                      padding: const EdgeInsets.all(4.0),
                                      child: Text(devices[index].id,
                                        style: TextStyle(fontSize:14, color: Colors.grey),),
                                    ),
                                  ],
                                ),
                              ));
                        }
                    ),
                  ),
                ],
              )
          ) : Container(
            height : double.infinity,
            child:
            Center(
              child: ElevatedButton(
                onPressed: ()=>{
                  scanBleDevice()
                  // _wifiDialog()
                },
                child: Text("Scan for bluetooth device"),
              ),
            ),
          ) : Align(
            alignment: Alignment.center,
            child: Container(
              padding: EdgeInsets.only(top: 250),
              color: Colors.white,
              child: Center(
                child: Column(
                  children: [
                    SpinKitRipple(color: Theme.of(context).textSelectionColor),
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: Text(loading, style: TextStyle(fontSize: 14, ),),
                    )
                  ],
                ),
              ),
            ),
          )),
    );
  }
}


class BleDevices {
  String name;
  String id;

  BleDevices(this.name, this.id);

  @override
  String toString() {
    return '{ ${this.name}, ${this.id} }';
  }
}

String _getStatusFromKey(ProvisionState key) {
  print(key);
  switch (key) {
    case ProvisionState.CREATE_SESSION_FAILED:
      return "Failed to establish session";
    case ProvisionState.WIFI_CONFIG_SENT:
      return "Wifi Configurations sent to device";
    case ProvisionState.WIFI_CONFIG_FAILED:
      return "Wifi Configurations Failed";
    case ProvisionState.WIFI_CONFIG_APPLIED:
      return "Wifi Configurations Applied to device";
    case ProvisionState.PROVISION_FAILED_FROM_DEVICE:
      return "Failed to apply Wifi Configuration to device";
    case ProvisionState.PROVISION_FAILED_FROM_DEVICE:
      return "Provisioning Failed from Device";
    case ProvisionState.DEVICE_PROVISIONED:
      return "Device Provisioned";
    case ProvisionState.PROVISION_FAILED_FROM_DEVICE:
      return "Failed to Provision Device";
    default:
      return "Failed!!";
  }
}