diff --git a/lib/tools/mqtt_core.dart b/lib/tools/mqtt_core.dart
index b4cf506..887c121 100644
--- a/lib/tools/mqtt_core.dart
+++ b/lib/tools/mqtt_core.dart
@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:io';
 import 'dart:math';
 
 import 'package:isar/isar.dart';
@@ -130,12 +131,17 @@ class MqttCore {
 
   publishText(String subtopic, String text) {
     try {
-      var buffer = Uint8Buffer();
-      buffer.addAll(text.codeUnits);
+      var textBuffer = Uint8Buffer();
+      textBuffer.addAll(text.codeUnits);
+
+      var compressedText = GZipCodec().encode(text.codeUnits);
+
+      var mqttBuffer = Uint8Buffer();
+      mqttBuffer.addAll(compressedText);
 
       var topic = "$_toServerTopic$subtopic/$_clientId";
 
-      _mqttClient.publishMessage( topic, MqttQos.exactlyOnce, buffer);
+      _mqttClient.publishMessage( topic, MqttQos.exactlyOnce, mqttBuffer);
 
       Util.logInfo("send message $text to $topic");
     } catch (e) {