diff --git a/example/blue/android/app/build.gradle b/example/blue/android/app/build.gradle
index 9be8e53..55deb1b 100644
--- a/example/blue/android/app/build.gradle
+++ b/example/blue/android/app/build.gradle
@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 33
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -40,7 +40,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.blue"
         minSdkVersion 21
-        targetSdkVersion 28
+        targetSdkVersion 33
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
diff --git a/example/blue/android/app/src/main/AndroidManifest.xml b/example/blue/android/app/src/main/AndroidManifest.xml
index ebf0490..43f5bf7 100644
--- a/example/blue/android/app/src/main/AndroidManifest.xml
+++ b/example/blue/android/app/src/main/AndroidManifest.xml
@@ -1,21 +1,50 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.blue">
+xmlns:tools="http://schemas.android.com/tools"
+    package="com.example.blue" >
     <!-- io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
          In most cases you can leave this as-is, but you if you want to provide
          additional functionality it is fine to subclass or reimplement
          FlutterApplication and put your custom class here. -->
+
+         <!-- required for API 18 - 30 -->
+<uses-permission
+    android:name="android.permission.BLUETOOTH"
+    />
+<uses-permission
+    android:name="android.permission.BLUETOOTH_ADMIN"
+     />
+
+<!-- required for API 23 - 30 -->
+<uses-permission-sdk-23
+    android:name="android.permission.ACCESS_COARSE_LOCATION"
+     />
+<uses-permission-sdk-23
+    android:name="android.permission.ACCESS_FINE_LOCATION"
+    />
+
+<!-- API 31+ -->
+<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+<uses-permission
+    android:name="android.permission.BLUETOOTH_SCAN"
+    android:usesPermissionFlags="neverForLocation"
+   />
     <application
-        android:name="io.flutter.app.FlutterApplication"
+        android:name="${applicationName}"
         android:label="blue"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
+            <!-- <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              /> -->
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
diff --git a/example/blue/android/app/src/main/kotlin/com/example/blue/MainActivity.kt b/example/blue/android/app/src/main/kotlin/com/example/blue/MainActivity.kt
index a32b948..09806c7 100644
--- a/example/blue/android/app/src/main/kotlin/com/example/blue/MainActivity.kt
+++ b/example/blue/android/app/src/main/kotlin/com/example/blue/MainActivity.kt
@@ -1,12 +1,6 @@
 package com.example.blue
 
-import androidx.annotation.NonNull;
 import io.flutter.embedding.android.FlutterActivity
-import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugins.GeneratedPluginRegistrant
 
 class MainActivity: FlutterActivity() {
-    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
-        GeneratedPluginRegistrant.registerWith(flutterEngine);
-    }
 }
diff --git a/example/blue/android/build.gradle b/example/blue/android/build.gradle
index 3100ad2..8fcd5e6 100644
--- a/example/blue/android/build.gradle
+++ b/example/blue/android/build.gradle
@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.8.0'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:7.2.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }
diff --git a/example/blue/android/gradle/wrapper/gradle-wrapper.properties b/example/blue/android/gradle/wrapper/gradle-wrapper.properties
index 296b146..cfe88f6 100644
--- a/example/blue/android/gradle/wrapper/gradle-wrapper.properties
+++ b/example/blue/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-all.zip
diff --git a/example/blue/lib/main.dart b/example/blue/lib/main.dart
index 108d463..90ef29f 100644
--- a/example/blue/lib/main.dart
+++ b/example/blue/lib/main.dart
@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'dart:typed_data';
 import 'package:intl/intl.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:flutter/services.dart';
@@ -51,7 +52,13 @@ class _MyHomePageState extends State<MyHomePage> {
     });
   }
 
-  void _startScanDevices() {
+  void _startScanDevices() async {
+    await [
+      Permission.location,
+      Permission.bluetooth,
+      Permission.bluetoothConnect,
+      Permission.bluetoothScan,
+    ].request();
     setState(() {
       _devices = [];
     });
@@ -62,8 +69,7 @@ class _MyHomePageState extends State<MyHomePage> {
     printerManager.stopScan();
   }
 
-  Future<List<int>> demoReceipt(
-      PaperSize paper, CapabilityProfile profile) async {
+  Future<List<int>> demoReceipt(PaperSize paper, CapabilityProfile profile) async {
     final Generator ticket = Generator(paper, profile);
     List<int> bytes = [];
 
@@ -81,56 +87,42 @@ class _MyHomePageState extends State<MyHomePage> {
         ),
         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.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([
       PosColumn(text: 'Qty', width: 1),
       PosColumn(text: 'Item', width: 7),
-      PosColumn(
-          text: 'Price', width: 2, styles: PosStyles(align: PosAlign.right)),
-      PosColumn(
-          text: 'Total', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: 'Price', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: 'Total', width: 2, styles: PosStyles(align: PosAlign.right)),
     ]);
 
     bytes += ticket.row([
       PosColumn(text: '2', width: 1),
       PosColumn(text: 'ONION RINGS', width: 7),
-      PosColumn(
-          text: '0.99', width: 2, styles: PosStyles(align: PosAlign.right)),
-      PosColumn(
-          text: '1.98', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '0.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '1.98', width: 2, styles: PosStyles(align: PosAlign.right)),
     ]);
     bytes += ticket.row([
       PosColumn(text: '1', width: 1),
       PosColumn(text: 'PIZZA', width: 7),
-      PosColumn(
-          text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
-      PosColumn(
-          text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '3.45', width: 2, styles: PosStyles(align: PosAlign.right)),
     ]);
     bytes += ticket.row([
       PosColumn(text: '1', width: 1),
       PosColumn(text: 'SPRING ROLLS', width: 7),
-      PosColumn(
-          text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
-      PosColumn(
-          text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '2.99', width: 2, styles: PosStyles(align: PosAlign.right)),
     ]);
     bytes += ticket.row([
       PosColumn(text: '3', width: 1),
       PosColumn(text: 'CRUNCHY STICKS', width: 7),
-      PosColumn(
-          text: '0.85', width: 2, styles: PosStyles(align: PosAlign.right)),
-      PosColumn(
-          text: '2.55', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '0.85', width: 2, styles: PosStyles(align: PosAlign.right)),
+      PosColumn(text: '2.55', width: 2, styles: PosStyles(align: PosAlign.right)),
     ]);
     bytes += ticket.hr();
 
@@ -155,35 +147,21 @@ class _MyHomePageState extends State<MyHomePage> {
     bytes += ticket.hr(ch: '=', linesAfter: 1);
 
     bytes += ticket.row([
-      PosColumn(
-          text: 'Cash',
-          width: 7,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
-      PosColumn(
-          text: '\$15.00',
-          width: 5,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+      PosColumn(text: 'Cash', width: 7, styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+      PosColumn(text: '\$15.00', width: 5, styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
     ]);
     bytes += ticket.row([
-      PosColumn(
-          text: 'Change',
-          width: 7,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
-      PosColumn(
-          text: '\$4.03',
-          width: 5,
-          styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+      PosColumn(text: 'Change', width: 7, styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
+      PosColumn(text: '\$4.03', width: 5, styles: PosStyles(align: PosAlign.right, width: PosTextSize.size2)),
     ]);
 
     bytes += ticket.feed(2);
-    bytes += ticket.text('Thank you!',
-        styles: PosStyles(align: PosAlign.center, bold: true));
+    bytes += ticket.text('Thank you!', styles: 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);
+    bytes += ticket.text(timestamp, styles: PosStyles(align: PosAlign.center), linesAfter: 2);
 
     // Print QR Code from image
     // try {
@@ -213,13 +191,11 @@ class _MyHomePageState extends State<MyHomePage> {
     return bytes;
   }
 
-  Future<List<int>> testTicket(
-      PaperSize paper, CapabilityProfile profile) async {
+  Future<List<int>> testTicket(PaperSize paper, CapabilityProfile profile) async {
     final Generator generator = Generator(paper, profile);
     List<int> bytes = [];
 
-    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');
+    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');
     // bytes += generator.text('Special 1: àÀ èÈ éÉ ûÛ üÜ çÇ ôÔ',
     //     styles: PosStyles(codeTable: PosCodeTable.westEur));
     // bytes += generator.text('Special 2: blåbærgrød',
@@ -227,14 +203,10 @@ class _MyHomePageState extends State<MyHomePage> {
 
     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('Align left', styles: PosStyles(align: PosAlign.left));
-    bytes += generator.text('Align center',
-        styles: PosStyles(align: PosAlign.center));
-    bytes += generator.text('Align right',
-        styles: PosStyles(align: PosAlign.right), linesAfter: 1);
+    bytes += generator.text('Underlined text', styles: PosStyles(underline: true), linesAfter: 1);
+    bytes += generator.text('Align left', styles: PosStyles(align: PosAlign.left));
+    bytes += generator.text('Align center', styles: PosStyles(align: PosAlign.center));
+    bytes += generator.text('Align right', styles: PosStyles(align: PosAlign.right), linesAfter: 1);
 
     bytes += generator.row([
       PosColumn(
@@ -298,8 +270,7 @@ 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 res = await printerManager.printTicket((await demoReceipt(paper, profile)));
 
     showToast(res.msg);
   }
diff --git a/example/blue/pubspec.yaml b/example/blue/pubspec.yaml
index f7e11c7..feeff9c 100644
--- a/example/blue/pubspec.yaml
+++ b/example/blue/pubspec.yaml
@@ -6,20 +6,19 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  flutter:
-    sdk: flutter
+  charset_converter: ^2.0.0
   cupertino_icons: ^1.0.3
-  oktoast: ^3.0.0
-  image: ^3.0.2
   esc_pos_bluetooth:
     path: ../../
   esc_pos_utils: ^1.1.0
-  # esc_pos_utils:
-  # path: ../../../esc_pos_utils
-  charset_converter: ^2.0.0
+  flutter:
+    sdk: flutter
+  image: ^3.0.2
   intl: ^0.17.0
-  qr_flutter: ^4.0.0
+  oktoast: ^3.0.0
   path_provider: ^2.0.2
+  permission_handler: ^10.4.3
+  qr_flutter: ^4.0.0
 
 dev_dependencies:
   flutter_test: