diff --git a/analysis_options.yaml b/analysis_options.yaml
new file mode 100644
index 0000000..f5f1328
--- /dev/null
+++ b/analysis_options.yaml
@@ -0,0 +1,21 @@
+include: package:effective_dart/analysis_options.yaml
+analyzer:
+  exclude:
+    - "**/generated_plugin_registrant.dart"
+    - "**/build/**"
+    - "**/generated_*.dart"
+    - "**/*.g.dart"
+    - "**/*.freezed.dart"
+    - "**/*.gr.dart"
+    - "**/l10n*.dart"
+    - "**/*.gen.dart"
+
+linter:
+  rules:
+    public_member_api_docs: false
+    one_member_abstracts: false
+    prefer_const_constructors: true
+    # IDE works bad with relative import
+    # See: https://github.com/dart-lang/sdk/issues/32916
+    prefer_relative_imports: false
+    always_use_package_imports: true
diff --git a/example/blue/analysis_options.yaml b/example/blue/analysis_options.yaml
new file mode 100644
index 0000000..f5f1328
--- /dev/null
+++ b/example/blue/analysis_options.yaml
@@ -0,0 +1,21 @@
+include: package:effective_dart/analysis_options.yaml
+analyzer:
+  exclude:
+    - "**/generated_plugin_registrant.dart"
+    - "**/build/**"
+    - "**/generated_*.dart"
+    - "**/*.g.dart"
+    - "**/*.freezed.dart"
+    - "**/*.gr.dart"
+    - "**/l10n*.dart"
+    - "**/*.gen.dart"
+
+linter:
+  rules:
+    public_member_api_docs: false
+    one_member_abstracts: false
+    prefer_const_constructors: true
+    # IDE works bad with relative import
+    # See: https://github.com/dart-lang/sdk/issues/32916
+    prefer_relative_imports: false
+    always_use_package_imports: true
diff --git a/example/blue/lib/main.dart b/example/blue/lib/main.dart
index 108d463..de7e1fc 100644
--- a/example/blue/lib/main.dart
+++ b/example/blue/lib/main.dart
@@ -1,15 +1,15 @@
-import 'dart:io';
-import 'dart:typed_data';
-import 'package:intl/intl.dart';
-import 'package:qr_flutter/qr_flutter.dart';
-import 'package:path_provider/path_provider.dart';
-import 'package:flutter/services.dart';
-import 'package:image/image.dart';
-import 'package:esc_pos_utils/esc_pos_utils.dart';
 import 'package:esc_pos_bluetooth/esc_pos_bluetooth.dart';
+import 'package:esc_pos_utils/esc_pos_utils.dart';
 import 'package:flutter/material.dart' hide Image;
+import 'package:flutter/services.dart';
+import 'package:image/image.dart';
+import 'package:intl/intl.dart';
 import 'package:oktoast/oktoast.dart';
 
+import 'dart:io';
+import 'package:qr_flutter/qr_flutter.dart';
+import 'package:path_provider/path_provider.dart';
+
 void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
@@ -55,7 +55,7 @@ class _MyHomePageState extends State<MyHomePage> {
     setState(() {
       _devices = [];
     });
-    printerManager.startScan(Duration(seconds: 4));
+    printerManager.startScan(const Duration(seconds: 4));
   }
 
   void _stopScanDevices() {
@@ -64,8 +64,8 @@ class _MyHomePageState extends State<MyHomePage> {
 
   Future<List<int>> demoReceipt(
       PaperSize paper, CapabilityProfile profile) async {
-    final Generator ticket = Generator(paper, profile);
-    List<int> bytes = [];
+    final generator = Generator(paper, profile);
+    var bytes = <int>[];
 
     // Print image
     // final ByteData data = await rootBundle.load('assets/rabbit_black.jpg');
@@ -73,117 +73,141 @@ class _MyHomePageState extends State<MyHomePage> {
     // final Image? image = decodeImage(imageBytes);
     // bytes += ticket.image(image);
 
-    bytes += ticket.text('GROCERYLY',
-        styles: PosStyles(
+    bytes += generator.text('GROCERYLY',
+        styles: const PosStyles(
           align: PosAlign.center,
           height: PosTextSize.size2,
           width: PosTextSize.size2,
         ),
         linesAfter: 1);
 
-    bytes += ticket.text('889  Watson Lane',
-        styles: PosStyles(align: PosAlign.center));
-    bytes += ticket.text('New Braunfels, TX',
-        styles: PosStyles(align: PosAlign.center));
-    bytes += ticket.text('Tel: 830-221-1234',
-        styles: PosStyles(align: PosAlign.center));
-    bytes += ticket.text('Web: www.example.com',
-        styles: PosStyles(align: PosAlign.center), linesAfter: 1);
-
-    bytes += ticket.hr();
-    bytes += ticket.row([
+    bytes += generator.text('889  Watson Lane',
+        styles: const PosStyles(align: PosAlign.center));
+    bytes += generator.text('New Braunfels, TX',
+        styles: const PosStyles(align: PosAlign.center));
+    bytes += generator.text('Tel: 830-221-1234',
+        styles: const PosStyles(align: PosAlign.center));
+    bytes += generator.text('Web: www.example.com',
+        styles: const PosStyles(align: PosAlign.center), linesAfter: 1);
+
+    bytes += generator.hr();
+    bytes += generator.row([
       PosColumn(text: 'Qty', width: 1),
       PosColumn(text: 'Item', width: 7),
       PosColumn(
-          text: 'Price', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: 'Price',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
       PosColumn(
-          text: 'Total', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: 'Total',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
     ]);
 
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(text: '2', width: 1),
       PosColumn(text: 'ONION RINGS', width: 7),
       PosColumn(
-          text: '0.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '0.99',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
       PosColumn(
-          text: '1.98', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '1.98',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
     ]);
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(text: '1', width: 1),
       PosColumn(text: 'PIZZA', width: 7),
       PosColumn(
-          text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '3.45',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
       PosColumn(
-          text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '3.45',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
     ]);
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(text: '1', width: 1),
       PosColumn(text: 'SPRING ROLLS', width: 7),
       PosColumn(
-          text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '2.99',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
       PosColumn(
-          text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '2.99',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
     ]);
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(text: '3', width: 1),
       PosColumn(text: 'CRUNCHY STICKS', width: 7),
       PosColumn(
-          text: '0.85', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '0.85',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
       PosColumn(
-          text: '2.55', width: 2, styles: PosStyles(align: PosAlign.right)),
+          text: '2.55',
+          width: 2,
+          styles: const PosStyles(align: PosAlign.right)),
     ]);
-    bytes += ticket.hr();
+    bytes += generator.hr();
 
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(
           text: 'TOTAL',
           width: 6,
-          styles: PosStyles(
+          styles: const PosStyles(
             height: PosTextSize.size2,
             width: PosTextSize.size2,
           )),
       PosColumn(
           text: '\$10.97',
           width: 6,
-          styles: PosStyles(
+          styles: const PosStyles(
             align: PosAlign.right,
             height: PosTextSize.size2,
             width: PosTextSize.size2,
           )),
     ]);
 
-    bytes += ticket.hr(ch: '=', linesAfter: 1);
+    bytes += generator.hr(ch: '=', linesAfter: 1);
 
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(
           text: 'Cash',
           width: 7,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+          styles:
+              const PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
       PosColumn(
           text: '\$15.00',
           width: 5,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+          styles:
+              const PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
     ]);
-    bytes += ticket.row([
+    bytes += generator.row([
       PosColumn(
           text: 'Change',
           width: 7,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+          styles:
+              const PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
       PosColumn(
           text: '\$4.03',
           width: 5,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+          styles:
+              const PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
     ]);
 
-    bytes += ticket.feed(2);
-    bytes += ticket.text('Thank you!',
-        styles: PosStyles(align: PosAlign.center, bold: true));
+    bytes += generator.feed(2);
+    bytes += generator.text('Thank you!',
+        styles: const PosStyles(align: PosAlign.center, bold: true));
 
     final now = DateTime.now();
     final formatter = DateFormat('MM/dd/yyyy H:m');
-    final String timestamp = formatter.format(now);
-    bytes += ticket.text(timestamp,
-        styles: PosStyles(align: PosAlign.center), linesAfter: 2);
+    final timestamp = formatter.format(now);
+    bytes += generator.text(timestamp,
+        styles: const PosStyles(align: PosAlign.center), linesAfter: 2);
 
     // Print QR Code from image
     // try {
@@ -208,15 +232,15 @@ class _MyHomePageState extends State<MyHomePage> {
     // Print QR Code using native function
     // bytes += ticket.qrcode('example.com');
 
-    ticket.feed(2);
-    ticket.cut();
+    generator.feed(2);
+    generator.cut();
     return bytes;
   }
 
   Future<List<int>> testTicket(
       PaperSize paper, CapabilityProfile profile) async {
-    final Generator generator = Generator(paper, profile);
-    List<int> bytes = [];
+    final generator = Generator(paper, profile);
+    var bytes = <int>[];
 
     bytes += generator.text(
         'Regular: aA bB cC dD eE fF gG hH iI jJ kK lL mM nN oO pP qQ rR sS tT uU vV wW xX yY zZ');
@@ -225,55 +249,57 @@ class _MyHomePageState extends State<MyHomePage> {
     // bytes += generator.text('Special 2: blåbærgrød',
     //     styles: PosStyles(codeTable: PosCodeTable.westEur));
 
-    bytes += generator.text('Bold text', styles: PosStyles(bold: true));
-    bytes += generator.text('Reverse text', styles: PosStyles(reverse: true));
-    bytes += generator.text('Underlined text',
-        styles: PosStyles(underline: true), linesAfter: 1);
+    bytes += generator.text('Bold text', styles: const PosStyles(bold: true));
     bytes +=
-        generator.text('Align left', styles: PosStyles(align: PosAlign.left));
+        generator.text('Reverse text', styles: const PosStyles(reverse: true));
+    bytes += generator.text('Underlined text',
+        styles: const PosStyles(underline: true), linesAfter: 1);
+    bytes += generator.text('Align left',
+        styles: const PosStyles(align: PosAlign.left));
     bytes += generator.text('Align center',
-        styles: PosStyles(align: PosAlign.center));
+        styles: const PosStyles(align: PosAlign.center));
     bytes += generator.text('Align right',
-        styles: PosStyles(align: PosAlign.right), linesAfter: 1);
+        styles: const PosStyles(align: PosAlign.right), linesAfter: 1);
 
     bytes += generator.row([
       PosColumn(
         text: 'col3',
         width: 3,
-        styles: PosStyles(align: PosAlign.center, underline: true),
+        styles: const PosStyles(align: PosAlign.center, underline: true),
       ),
       PosColumn(
         text: 'col6',
         width: 6,
-        styles: PosStyles(align: PosAlign.center, underline: true),
+        styles: const PosStyles(align: PosAlign.center, underline: true),
       ),
       PosColumn(
         text: 'col3',
         width: 3,
-        styles: PosStyles(align: PosAlign.center, underline: true),
+        styles: const PosStyles(align: PosAlign.center, underline: true),
       ),
     ]);
 
     bytes += generator.text('Text size 200%',
-        styles: PosStyles(
+        styles: const PosStyles(
           height: PosTextSize.size2,
           width: PosTextSize.size2,
         ));
 
     // Print image
-    final ByteData data = await rootBundle.load('assets/logo.png');
-    final Uint8List buf = data.buffer.asUint8List();
-    final Image image = decodeImage(buf)!;
+    final byteData = await rootBundle.load('assets/logo.png');
+    final buf = byteData.buffer.asUint8List();
+    final image = decodeImage(buf)!;
     bytes += generator.image(image);
     // Print image using alternative commands
     // bytes += generator.imageRaster(image);
     // bytes += generator.imageRaster(image, imageFn: PosImageFn.graphics);
 
     // Print barcode
-    final List<int> barData = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 4];
-    bytes += generator.barcode(Barcode.upcA(barData));
+    final barcodeData = <int>[1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 4];
+    bytes += generator.barcode(Barcode.upcA(barcodeData));
 
-    // Print mixed (chinese + latin) text. Only for printers supporting Kanji mode
+    // Print mixed (chinese + latin) text.
+    // Only for printers supporting Kanji mode
     // bytes += generator.text(
     //   'hello ! 中文字 # world @ éphémère &',
     //   styles: PosStyles(codeTable: PosCodeTable.westEur),
@@ -290,7 +316,7 @@ class _MyHomePageState extends State<MyHomePage> {
     printerManager.selectPrinter(printer);
 
     // TODO Don't forget to choose printer's paper
-    const PaperSize paper = PaperSize.mm80;
+    const paperSize = PaperSize.mm80;
     final profile = await CapabilityProfile.load();
 
     // TEST PRINT
@@ -298,10 +324,10 @@ class _MyHomePageState extends State<MyHomePage> {
     // await printerManager.printTicket(await testTicket(paper));
 
     // DEMO RECEIPT
-    final PosPrintResult res =
-        await printerManager.printTicket((await demoReceipt(paper, profile)));
+    final posPrintResult = await printerManager
+        .printTicket((await demoReceipt(paperSize, profile)));
 
-    showToast(res.msg);
+    showToast(posPrintResult.msg);
   }
 
   @override
@@ -312,19 +338,19 @@ class _MyHomePageState extends State<MyHomePage> {
       ),
       body: ListView.builder(
           itemCount: _devices.length,
-          itemBuilder: (BuildContext context, int index) {
+          itemBuilder: (context, index) {
             return InkWell(
               onTap: () => _testPrint(_devices[index]),
               child: Column(
                 children: <Widget>[
                   Container(
                     height: 60,
-                    padding: EdgeInsets.only(left: 10),
+                    padding: const EdgeInsets.only(left: 10),
                     alignment: Alignment.centerLeft,
                     child: Row(
                       children: <Widget>[
-                        Icon(Icons.print),
-                        SizedBox(width: 10),
+                        const Icon(Icons.print),
+                        const SizedBox(width: 10),
                         Expanded(
                           child: Column(
                             crossAxisAlignment: CrossAxisAlignment.start,
@@ -342,7 +368,7 @@ class _MyHomePageState extends State<MyHomePage> {
                       ],
                     ),
                   ),
-                  Divider(),
+                  const Divider(),
                 ],
               ),
             );
@@ -353,13 +379,13 @@ class _MyHomePageState extends State<MyHomePage> {
         builder: (c, snapshot) {
           if (snapshot.data!) {
             return FloatingActionButton(
-              child: Icon(Icons.stop),
+              child: const Icon(Icons.stop),
               onPressed: _stopScanDevices,
               backgroundColor: Colors.red,
             );
           } else {
             return FloatingActionButton(
-              child: Icon(Icons.search),
+              child: const Icon(Icons.search),
               onPressed: _startScanDevices,
             );
           }
diff --git a/example/blue/pubspec.yaml b/example/blue/pubspec.yaml
index f7e11c7..7744fb2 100644
--- a/example/blue/pubspec.yaml
+++ b/example/blue/pubspec.yaml
@@ -1,4 +1,4 @@
-name: blue
+name: esc_pos_bluetooth_example
 description: A new Flutter project.
 version: 1.0.0+1
 
@@ -20,6 +20,7 @@ dependencies:
   intl: ^0.17.0
   qr_flutter: ^4.0.0
   path_provider: ^2.0.2
+  effective_dart: ^1.3.0
 
 dev_dependencies:
   flutter_test:
diff --git a/lib/src/printer_bluetooth_manager.dart b/lib/src/printer_bluetooth_manager.dart
index b4ebc07..b274a0e 100644
--- a/lib/src/printer_bluetooth_manager.dart
+++ b/lib/src/printer_bluetooth_manager.dart
@@ -8,18 +8,23 @@
 
 import 'dart:async';
 import 'dart:io';
-import 'package:esc_pos_utils/esc_pos_utils.dart';
-import 'package:rxdart/rxdart.dart';
+
+import 'package:esc_pos_bluetooth/src/enums.dart';
 import 'package:flutter_bluetooth_basic/flutter_bluetooth_basic.dart';
-import './enums.dart';
+import 'package:rxdart/rxdart.dart';
+
+import 'package:esc_pos_utils/esc_pos_utils.dart';
 
 /// Bluetooth printer
 class PrinterBluetooth {
   PrinterBluetooth(this._device);
+
   final BluetoothDevice _device;
 
   String? get name => _device.name;
+
   String? get address => _device.address;
+
   int? get type => _device.type;
 }
 
@@ -33,10 +38,12 @@ class PrinterBluetoothManager {
   PrinterBluetooth? _selectedPrinter;
 
   final BehaviorSubject<bool> _isScanning = BehaviorSubject.seeded(false);
+
   Stream<bool> get isScanningStream => _isScanning.stream;
 
   final BehaviorSubject<List<PrinterBluetooth>> _scanResults =
       BehaviorSubject.seeded([]);
+
   Stream<List<PrinterBluetooth>> get scanResults => _scanResults.stream;
 
   Future _runDelayed(int seconds) {
@@ -76,9 +83,9 @@ class PrinterBluetoothManager {
     int chunkSizeBytes = 20,
     int queueSleepTimeMs = 20,
   }) async {
-    final Completer<PosPrintResult> completer = Completer();
+    final completer = Completer<PosPrintResult>();
 
-    const int timeout = 5;
+    const timeout = 5;
     if (_selectedPrinter == null) {
       return Future<PosPrintResult>.value(PosPrintResult.printerNotSelected);
     } else if (_isScanning.value!) {
@@ -90,7 +97,7 @@ class PrinterBluetoothManager {
     _isPrinting = true;
 
     // We have to rescan before connecting, otherwise we can connect only once
-    await _bluetoothManager.startScan(timeout: Duration(seconds: 1));
+    await _bluetoothManager.startScan(timeout: const Duration(seconds: 1));
     await _bluetoothManager.stopScan();
 
     // Connect
@@ -103,7 +110,7 @@ class PrinterBluetoothManager {
           // To avoid double call
           if (!_isConnected) {
             final len = bytes.length;
-            List<List<int>> chunks = [];
+            var chunks = <List<int>>[];
             for (var i = 0; i < len; i += chunkSizeBytes) {
               var end = (i + chunkSizeBytes < len) ? i + chunkSizeBytes : len;
               chunks.add(bytes.sublist(i, end));
diff --git a/pubspec.yaml b/pubspec.yaml
index 84965c2..030b8d1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,6 +10,7 @@ dependencies:
   flutter:
     sdk: flutter
   rxdart: ^0.26.0
+  effective_dart: ^1.3.0
   esc_pos_utils: ^1.1.0
   # esc_pos_utils:
   # path: ../esc_pos_utils
diff --git a/test/esc_pos_bluetooth_test.dart b/test/esc_pos_bluetooth_test.dart
index 349f625..2f6b825 100644
--- a/test/esc_pos_bluetooth_test.dart
+++ b/test/esc_pos_bluetooth_test.dart
@@ -1,7 +1,5 @@
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:esc_pos_bluetooth/esc_pos_bluetooth.dart';
-
 void main() {
   test('Tests not implemented', () {
     expect(1, 1);