MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer; int rc; int ch; // 创建异步连接客户端,不使用 Paho SDK 内置的持久化来处理缓存消息 if ((rc = MQTTAsync_create(&client, ADDRESS, CLIENTID, MQ...
MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;intrc;intch;// 创建异步连接客户端,不使用 Paho SDK 内置的持久化来处理缓存消息if((rc =MQTTAsync_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERS...
MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;intrc;intch;// 创建异步连接客户端,不使用 Paho SDK 内置的持久化来处理缓存消息if((rc =MQTTAsync_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERS...
connect_async(host, port=1883, keepalive=60, bind_address="") 6.connect_srv() 使用SRV DNS查找连接到代理以获取代理地址。 connect_srv(domain, keepalive=60, bind_address="") 7.reconnect() 使用先前提供的详细信息重新连接到经纪商。 在调用此函数之前,您必须先调用connect *()。 reconnect() 8.d...
printf("Failed to start connect, return code %d\n", rc); finished = 1; } } int main(int argc, char* argv[]) { // 创建异步连接客户端需要使用的属性结构体 MQTTAsync client; MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; ...
typedef void MQTTAsync_connected(void* context, char* cause);说明 每一次SDK与云平台成功连接（收到CONNACK帧且校验通过）后都会调用该回调函数，包括用户主动建立和SDK自动建立，通过形参cause确定是自动还是手动；手动调用MQTTAsync_connect()函数时，因为配置了onSuccess回调函数，所以此时本函数是冗余的；在配置...
MQTTAsync_connect() 是 MQTTAsync 库中用于建立与 MQTT 代理(服务器)连接的函数。它接受两个参数: MQTTAsync 客户端对象和 MQTTAsync_connectOptions 结构体对象,用于指定连接的选项。 以下是 MQTTAsync_connect() 函数的详细说明: MQTTAsync_connect(client, connectOptions) 参数: client: MQTTAsync 客户端对象,...
connect_async()is helpful in scenarios where an MQTT client application requires long-term MQTT connections or needs to keep the MQTT connection alive in the background without blocking the main thread. Its primary use cases are: Long-term MQTT connections:connect_async()helps prevent stalling or...
connect_async( host, port=1883, keepalive=60, bind_address="" ) — 以异步非阻塞的方式进行连接 reconnect() — 使用之前的配置信息从新连接, 但是必须在 connect*() 之前调用 disconnect() — 断开连接, 将不会等待所有排队的消息被发送,以确保所有邮件都已发送 ...
client.connect(options); client.subscribe(topic); MqttMessage message = new MqttMessage(); message.setPayload("15".getBytes()); client.publish(topic, message); client.disconnect(); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...