pub.go 1.2 KB

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  1. // Copyright 2021-2022 EMQ Technologies Co., Ltd.
  2. //
  3. // Licensed under the Apache License, Version 2.0 (the "License");
  4. // you may not use this file except in compliance with the License.
  5. // You may obtain a copy of the License at
  6. //
  7. // http://www.apache.org/licenses/LICENSE-2.0
  8. //
  9. // Unless required by applicable law or agreed to in writing, software
  10. // distributed under the License is distributed on an "AS IS" BASIS,
  11. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. // See the License for the specific language governing permissions and
  13. // limitations under the License.
  14. package main
  15. import (
  16. "fmt"
  17. "time"
  18. mqtt "github.com/eclipse/paho.mqtt.golang"
  19. )
  20. const (
  21. tps = 500
  22. )
  23. func pub() {
  24. opts := mqtt.NewClientOptions().AddBroker(mqttUrl)
  25. client := mqtt.NewClient(opts)
  26. defer client.Disconnect(0)
  27. if token := client.Connect(); token.Wait() && token.Error() != nil {
  28. panic(token.Error())
  29. }
  30. for i := 0; ; i++ {
  31. payload := []byte(fmt.Sprintf(`{"temperature":%d,"humidity":90}`, 12+i%10))
  32. if token := client.Publish("rawdata", 0, false, payload); token.Wait() && token.Error() != nil {
  33. fmt.Println(token.Error())
  34. }
  35. time.Sleep(1000 / tps * time.Millisecond)
  36. }
  37. }