void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     title: 'Flutter Demo',
     theme: ThemeData(
       primarySwatch: Colors.blue,
     ),
     home: MyHomePage(title: 'Flutter + IoT :):):)'),
   );
 }
}

class MyHomePage extends StatefulWidget {
 MyHomePage({Key key, this.title}) : super(key: key);

 final String title;

 @override
 _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

 int luz = 0;
 int temperatura = 0;

 @override
 Widget build(BuildContext context) {
   return Scaffold(
     appBar: AppBar(
       title: Text(widget.title),
     ),
     body: Center(
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
         SizedBox(
               height: 100,
               child: Card(
                 elevation: 20,
                 child: Row(
                   mainAxisAlignment: MainAxisAlignment.spaceAround,
                   children: <Widget>[
                     RaisedButton(
                       onPressed: null,
                       child: Text(
                           'ON',
                           style: TextStyle(fontSize: 20)
                       ),
                     ),
                     RaisedButton(
                       onPressed: null,
                       child: Text(
                           'OFF',
                           style: TextStyle(fontSize: 20)
                       ),
                     ),
                   ],
                 ),
             ),
           ),
           SizedBox(
             child: Card(
               elevation: 20,
               child: Column(
                 children: [
                   ListTile(
                     title: Text('Sensor de Luz',
                         style: TextStyle(fontWeight: FontWeight.w500)),
                     subtitle: Text('$luz'),
                     leading: Icon(
                       Icons.lightbulb_outline,
                       color: Colors.blue[500],
                     ),
                   ),
                   Divider(),
                   ListTile(
                     title: Text('Sensor de Temperatura:',
                         style: TextStyle(fontWeight: FontWeight.w500)),
                     subtitle: Text('$temperatura C'),
                     leading: Icon(
                       Icons.toys,
                       color: Colors.blue[500],
                     ),
                   )
                 ],
               ),
             ),
           )
         ],
       ),
     ),
   );
 }
}