huaweicloud-iot-device-sdk-go/samples/async/message/msg.go

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package main
import (
"fmt"
iot "github.com/ctlove0523/huaweicloud-iot-device-sdk-go"
uuid "github.com/satori/go.uuid"
"time"
)
func main() {
// 创建一个设备并初始化
device := iot.CreateAsyncIotDevice("5fdb75cccbfe2f02ce81d4bf_liqian", "123456789", "tls://iot-mqtts.cn-north-4.myhuaweicloud.com:8883")
device.Init()
// 注册平台下发消息的callback当收到平台下发的消息时调用此callback.
// 支持注册多个callback并且按照注册顺序调用
device.AddMessageHandler(func(message iot.Message) bool {
fmt.Println("first handler called" + iot.Interface2JsonString(message))
return true
})
device.AddMessageHandler(func(message iot.Message) bool {
fmt.Println("second handler called" + iot.Interface2JsonString(message))
return true
})
//向平台发送消息
message := iot.Message{
ObjectDeviceId: uuid.NewV4().String(),
Name: "Fist send message to platform",
Id: uuid.NewV4().String(),
Content: "Hello Huawei IoT Platform",
}
asyncResult := device.SendMessage(message)
if asyncResult.Wait() && asyncResult.Error() != nil {
fmt.Println("async send message failed")
} else {
fmt.Println("async send message success")
}
time.Sleep(2 * time.Minute)
}