opts := mqtt.NewClientOptions().AddBroker("tcp://test.mosquitto.org:1883") // 定义代理地址和端口 opts.SetClientID("go-mqtt-client") // 设置客户端ID client := mqtt.NewClient(opts) if token := client.Connect(); token.Wait() && token.Error() != nil { panic(token.Error()) } fmt...
packagemainimport("fmt"mqtt"github.com/eclipse/paho.mqtt.golang""time")varmessagePubHandler mqtt.MessageHandler =func(client mqtt.Client, msg mqtt.Message){ fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic()) }varconnectHandler mqtt.OnConnectHandler =func(client...
packagemainimport("fmt"mqtt"github.com/eclipse/paho.mqtt.golang""time")varmessagePubHandler mqtt.MessageHandler =func(client mqtt.Client, msg mqtt.Message){ fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic()) }varconnectHandler mqtt.OnConnectHandler =func(client...
1、当服务器启动后调用InitClient,此方法中有一个设置 {opts.CleanSession = true} ,再使用go关键字异步调用SubscribB。 2、这时手机是可以操作设备的。 3、当MQTT服务器断开链接,服务器的client也重新链接,手机就再也操作不了设备。 4、查找资料发现opts.CleanSession设置为true时,断开链接,订阅的主题都会被清空。
在Golang中订阅阿里云的MQTT服务,你需要使用支持MQTT协议的客户端库,例如Eclipse Paho MQTT Go Client。以下是一个简单的步骤指南和代码示例,帮助你实现Golang对阿里云MQTT的订阅功能: 1. 安装MQTT客户端库 首先,你需要安装Eclipse Paho MQTT Go Client。可以使用以下命令来安装: bash go get github.com/eclipse/pah...
client :=MQTT.NewClient(opts)iftoken := client.Connect(); token.Wait() && token.Error() !=nil { panic(token.Error()) }var( namestringageintmarriedbool) fmt.Scan(&name, &age, &married) fmt.Printf("扫描结果 name:%s age:%d married:%t\t", name, age, married) ...
opts.SetClientID("go_mqtt_client111")//设备唯一id,正常应该是设备拿自己的设备id注册到服务器上。opts.SetUsername("emqx")//账号opts.SetPassword("public")//密码opts.SetDefaultPublishHandler(messagePubHandler) opts.OnConnect = connectHandler
package main import ( "fmt" mqtt "github.com/eclipse/paho.mqtt.golang" "time" ) var messagePubHandler mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) { fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic()) } var connectHandler mqtt.OnConne...
--创建一个MQTT客户端 local mqttClient = mqtt.client(imei,600,"user","password") --阻塞执行MQTT CONNECT动作,直至成功 --如果使用ssl连接,打开mqttClient:connect("lbsmqtt.airm2m.com",1884,"tcp_ssl",{caCert="ca.crt"}),根据自己的需求配置 ...
MQTT "github.com/eclipse/paho.mqtt.golang" ) var f MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) { fmt.Printf("TOPIC: %s\n", msg.Topic()) fmt.Printf("MSG: %s\n", msg.Payload()) } var fail_nums int = 0 func main() { //生成连接的客户端数 c := flag.Ui...