mqtt新增二进制数据发布

lib/base/mqtt/mqtt.dart

@@ -3,6 +3,7 @@ import 'dart:typed_data';
 
 import 'package:mqtt5_client/mqtt5_client.dart';
 import 'package:mqtt5_client/mqtt5_server_client.dart';
+import 'package:typed_data/src/typed_buffer.dart';
 
 class Mqtt {
   final MqttConfig _config;
@@ -125,6 +126,21 @@ class Mqtt {
       return false;
     }
   }
+
+  Future<bool> publishBuff(String topic, Uint8List data, {int qos = 0}) async {
+    try {
+      var payload = MqttPayloadBuilder();
+      // data.buffer
+      payload.addBuffer(Uint8Buffer()..addAll(data));
+
+      _client?.publishMessage(
+          topic, MqttUtilities.getQosLevel(qos), payload.payload!);
+      return true;
+    } catch (e) {
+      print(e);
+      return false;
+    }
+  }
 }
 
 class MqttConfig {