importorg.eclipse.paho.client.mqttv3.MqttAsyncClient;importorg.eclipse.paho.client.mqttv3.MqttMessage;importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.stereotype.Service;@ServicepublicclassMqttPublishService{@AutowiredprivateMqttAsyncClientmqttAsyncClient;publicvoidpublish(String...
importorg.eclipse.paho.client.mqttv3.MqttClient;importorg.eclipse.paho.client.mqttv3.MqttMessage;publicclassMqttPublisher{publicstaticvoidpublishMessage(Stringtopic,Stringcontent){try{MqttClientclient=newMqttClient("tcp://localhost:1883",MqttClient.generateClientId());client.connect();MqttMessagemessage=new...
使用Python库paho.mqtt.client 模拟mqtt client 连接broker,publish topic。 #-*-coding:utf-8-*-importpaho.mqtt.client as mqttclassmqttHandle(object):def__init__(self,mqtt_info): self.mqtt_info=mqtt_infodefon_connect(client, userdata, flags, rc):print("Connected with result code"+str(rc)) c...
首先我们来实现一个DNS查询功能，该功能的目的是传入一个网站域名自动将该域名解析为对应的IP地址，该功...
mqtt协议里并没有messageId的说法，但是你mqtt发的消息，可以根据完整topic+发送端clientId+发送的分钟级...
Linux 5.15.0-113-generic x86_64 x86_64 What steps can reproduce the bug? Run this code #!/home/clansty/.bun/bin/bunimport{$}from"bun";importmqttfrom"mqtt";constclient=mqtt.connect("mqtt://10.1.1.1",{username:'mqtt',password:'mqtt'})constresult=await$`date`.text();console.log(resu...
I am not a seasoned C programmer, knowing just enough to usually figure things out. But I am running into a problem with MQTT pubsub, specifically client.publish. I can publish ("topic","payload") all day long, but when I try to publish ...
问题描述:安卓mqtt发送一条消息,发送之前检测网络,发现网络突然断了,又突然连上了,此时发送消息时,报空指针 mClient不设置为空的话 ,始终不为null 相关代码: {代码...} 报错信息: Caused by: java.lang...
mqttClient.publish(topic, message); } catch (MqttException e) { log.error(e.getMessage(), e); } finally { disconnect(mqttClient); close(mqttClient); } } 错误如下: 2022-12-24 10:47:05 INFO [ MQTT Call: paho2316157135488795] com.qishuo.bmc.message.mqtt.MqttSendCallBack (MqttSendCall...