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73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
4 months ago
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// package main
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// import (
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// "flag"
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// "fmt"
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// "git.runcible.io/learning/learn_mqtt_go/common"
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// )
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// func main() {
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// flag.Parse()
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// fmt.Printf("MQTT Host: %s\nMQTT Port: %s\n", *common.BrokerHost, *common.BrokerPort)
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// }
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package main
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import (
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"fmt"
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"time"
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mqtt "github.com/eclipse/paho.mqtt.golang"
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)
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var messagePubHandler mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
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fmt.Printf("Received message: %s from topic: %s\n", msg.Payload(), msg.Topic())
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}
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var connectHandler mqtt.OnConnectHandler = func(client mqtt.Client) {
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fmt.Println("Connected")
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}
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var connectLostHandler mqtt.ConnectionLostHandler = func(client mqtt.Client, err error) {
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fmt.Printf("Connect lost: %v", err)
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}
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func main() {
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var broker = "0.0.0.0"
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var port = 1883
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opts := mqtt.NewClientOptions()
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opts.AddBroker(fmt.Sprintf("tcp://%s:%d", broker, port))
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// opts.SetClientID("go_mqtt_client")
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opts.SetUsername("dirp")
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opts.SetPassword("dirp")
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opts.SetDefaultPublishHandler(messagePubHandler)
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opts.OnConnect = connectHandler
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opts.OnConnectionLost = connectLostHandler
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client := mqtt.NewClient(opts)
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if token := client.Connect(); token.Wait() && token.Error() != nil {
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panic(token.Error())
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}
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sub(client)
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publish(client)
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client.Disconnect(250)
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}
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func publish(client mqtt.Client) {
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num := 10
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for i := 0; i < num; i++ {
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text := fmt.Sprintf("Message %d", i)
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token := client.Publish("topic/test", 0, false, text)
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token.Wait()
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time.Sleep(time.Second)
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}
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}
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func sub(client mqtt.Client) {
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topic := "topic/test"
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token := client.Subscribe(topic, 1, nil)
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token.Wait()
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fmt.Printf("Subscribed to topic: %s", topic)
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}
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