Publish 方法

发布 MQTT 消息。

语法

retCode
= mqttClient
.
Publish
(message As MQTTMessage
)

其中

retCode
- 是 MqttPublishCode 对象的常量。

mqttClient
- 是由 MQTTFactory 对象的方法

CreateClient

创建的 MQTTClient 对象。

示例

Dim retCode As MqttPublishCode
Dim msg As MQTTMessage
Dim data() As Byte

Set msg = MqttFactory.CreateApplicationMessage()
msg.PayloadFormat = MqttPayloadCharacter
msg.contenttype = "String"
msg.Topic = "Topic"
msg.payload = "This is the msg text."
msg.SubscriptionIdentifiers = CLng(1)
data = StrConv("This is the correlation.", vbFromUnicode)
msg.correlation = data
msg.ResponseTopic = "This is the response topic."
msg.AddUserProperty "Head1", "Node1"
msg.QoS = MqttQoS2

retCode = mqttClient.Publish(msg)

MQTTClient 对象

MqttPublishCode 常量

CreateClient 方法

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