*/ mosquitto_connect_callback_set(mosq, on_connect); mosquitto_publish_callback_set(mosq, on_publish); /* Connect to test.mosquitto.org on port 1883, with a keepalive of 60 seconds. * This call makes the socket connection only, it does not complete the MQTT * CONNECT/CONNACK flow, ...
mosquitto_publish_callback_set(mosq, my_publish_callback); mosquitto_connect_callback_set(mosq, my_connect_callback); mosquitto_disconnect_callback_set(mosq, my_disconnect_callback); mosquitto_will_set(mosq,"wang/will",sizeof("livewill"),"livewill",2,false);//Used to tell the library th...
(1)mosquitto_connect_callback_set (2)mosquitto_disconnect_callback_set (3)mosquitto_publish_callback_set (4)mosquitto_message_callback_set (5)mosquitto_subscribe_callback_set (6)mosquitto_unsubscribe_callback_set (7)mosquitto_log_callback_set 八、实用功能 mosquitto_strerror 九、常见返回值 一、...
mosquitto_will_set(mosq,true,will_topic,will_payloadlen,will_payload,will_qos,will_retain); mosquitto_connect_callback_set(mosq,my_connect_callback); mosquitto_disconnect_callback_set(mosq,my_disconnect_callback); mosquitto_publish_callback_set(mosq,my_publish_callback); rc=mosquitto_connect(mos...
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在这个示例中,我们创建了一个 Mosquitto 客户端实例,并通过调用mosquitto_publish_callback_set()函数设置了发布回调函数。然后,我们通过mosquitto_publish()函数发布了一条消息。 订阅消息 要从MQTT 代理订阅消息,我们需要设置订阅主题、参数等。以下是订阅消息的代码示例: ...
Mosquitto是一个开源的MQTT消息代理(Broker),用于实现MQTT协议。它允许设备和应用在不同的网络之间进行消息传递,从而实现实时通信和数据交换。Mosquitto提供了许多功能,如发布(Publish)和订阅(Subscribe),QoS(Quality of Service)级别控制等。 安装Mosquitto 你可以在不同的操作系统上安装和运行Mosquitto。以下是一些基本的...
mosquitto_disconnect_callback_set(mosq, my_disconnect_callback); mosquitto_publish_callback_set(mosq, my_publish_callback); mosquitto_message_callback_set(mosq, my_message_callback); mosquitto_connect(mosq, "自己的 mqtt server", 1883, 600); mosquitto_subscribe(mosq, &mid, “sub的topic”, ...
mosq) { std::cerr << "Failed to create MQTT client" << std::endl; return -1; } // 设置消息回调函数 mosquitto_message_callback_set(mosq, message_callback); // 连接到MQTT代理 if (mosquitto_connect(mosq, host, port, keepalive) != MOSQ_ERR_SUCCESS) { std::cerr << "MQTT ...
int mosquitto_disconnect_callback_set(struct mosquitto*mosq, void(*on_disconnect)(struct mosquitto*, void*, int)); int mosquitto_publish_callback_set(struct mosquitto*mosq, void(*on_publish)(struct mosquitto*, void*, int)); int mosquitto_message_callback_set(struct mosquitto*mosq, void(*on...