diff --git a/assets/icon.png b/assets/icon.png
new file mode 100644
index 0000000..880fea0
Binary files /dev/null and b/assets/icon.png differ
diff --git a/lib/tools/mqtt_core.dart b/lib/tools/mqtt_core.dart
index e032838..e9d9085 100644
--- a/lib/tools/mqtt_core.dart
+++ b/lib/tools/mqtt_core.dart
@@ -131,14 +131,14 @@ class MqttCore {
 
   publishText(String subtopic, String text) {
     try {
-      var compressedText = GZipCodec().encode(utf8.encode(text));
+      var buffer = Uint8Buffer();
+      buffer.addAll(utf8.encode(text));
 
-      var mqttBuffer = Uint8Buffer();
-      mqttBuffer.addAll(compressedText);
+      _mqttClient.publishMessage(subtopic, MqttQos.exactlyOnce, buffer);
 
       var topic = "$_toServerTopic$subtopic/$_clientId";
 
-      _mqttClient.publishMessage( topic, MqttQos.exactlyOnce, mqttBuffer);
+      _mqttClient.publishMessage( topic, MqttQos.exactlyOnce, buffer);
 
       Util.logInfo("send message $text to $topic");
     } catch (e) {
diff --git a/pubspec.lock b/pubspec.lock
index dc4ebfd..249c53a 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -217,6 +217,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.3"
+  cli_util:
+    dependency: transitive
+    description:
+      name: cli_util
+      sha256: c05b7406fdabc7a49a3929d4af76bcaccbbffcbcdcf185b082e1ae07da323d19
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.1"
   clock:
     dependency: transitive
     description:
@@ -446,6 +454,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.6.12"
+  flutter_launcher_icons:
+    dependency: "direct main"
+    description:
+      name: flutter_launcher_icons
+      sha256: "526faf84284b86a4cb36d20a5e45147747b7563d921373d4ee0559c54fcdbcea"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.13.1"
   flutter_link_previewer:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index d8362be..44d9f98 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -67,6 +67,7 @@ dependencies:
   expandable: ^5.0.1
   url_launcher: ^6.2.4
   audioplayers: ^5.2.1
+  flutter_launcher_icons: ^0.13.1
 
 dev_dependencies:
   flutter_test:
@@ -86,6 +87,12 @@ dev_dependencies:
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
 
+flutter_launcher_icons:
+  android: "assets/icon.png"
+  ios: true
+  image_path: "assets/icon.png"
+  min_sdk_android: 21
+
 # The following section is specific to Flutter packages.
 flutter: