diff --git a/README.md b/README.md
index d9b66edf..2e511c2e 100755
--- a/README.md
+++ b/README.md
@@ -200,6 +200,11 @@ http://iotkit-open-source.gitee.io/document/
 ![输入图片说明](doc/ma.png) 
 
 
+#### 开源生态
+
+1. [mybatis-plus版数据服务](https://gitee.com/openiot/iotkit-parent-mybatis)（直接替换iot-data-serviceImpl-rdb就能从jpa切换成mybatis-plus）
+
+
 ### 项目规划
 
 见：《[开源项目管理](https://open-iita.feishu.cn/base/G4owbWqkbaoI0LsYVnWcreXVnnc)》
diff --git a/iot-components/iot-nb-component/src/main/java/cc/iotkit/comp/nb/NBVerticle.java b/iot-components/iot-nb-component/src/main/java/cc/iotkit/comp/nb/NBVerticle.java
index f3523f42..6f025c31 100644
--- a/iot-components/iot-nb-component/src/main/java/cc/iotkit/comp/nb/NBVerticle.java
+++ b/iot-components/iot-nb-component/src/main/java/cc/iotkit/comp/nb/NBVerticle.java
@@ -215,7 +215,7 @@ public class NBVerticle extends AbstractVerticle {
             throw new BizException(ErrCode.SEND_DESTINATION_NOT_FOUND);
         }
         Future<Integer> result = endpoint.publish(topic, msg,
-                MqttQoS.AT_LEAST_ONCE, false, false);
+                MqttQoS.AT_MOST_ONCE, false, false);
         result.onFailure(e -> log.error("public topic failed", e));
         result.onSuccess(integer -> log.info("publish success,topic:{},payload:{}", topic, msg));
     }