82 lines
2.8 KiB
C
Executable File
82 lines
2.8 KiB
C
Executable File
#include <mosquitto.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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struct mosquitto* client;
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int isRunning = 1;
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pthread_t main_th_id;
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void connect_callback(struct mosquitto* mosq, void* args, int rc) {
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if (rc == 0) {
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printf("连接MQTT服务成功!\n");
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} else {
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printf("连接MQTT服务失败!\n");
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}
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}
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void on_subscribe(struct mosquitto* mosq,
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void* obj,
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int mid,
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int qos_count,
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const int* granted_qos) {
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printf("-订阅的消息ID为--%d 成功， Qos的granted: %d--\n", mid,
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*granted_qos);
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}
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void on_message(struct mosquitto* mosq,
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void* obj,
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const struct mosquitto_message* message) {
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printf("收到%s(%d)的消息: %s\n", message->topic, message->mid,
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(char*)message->payload);
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if (strncmp((char*)message->payload, "exit", 4) == 0) {
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isRunning = 0;
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mosquitto_loop_stop(client, true);
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}
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}
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int main(int argc, char const* argv[]) {
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main_th_id = pthread_self();
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// 1. 初始化mosquitto的库环境
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mosquitto_lib_init(); // 初始化（固定格式）
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// 使用mosquitto库函数前，要先初始化，使用之后要清除。
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// 2. 创建mosquitto的客户端
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unsigned char userdata[128] = "1";
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client = mosquitto_new("166", true, userdata); // 创建客户端句柄
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// struct mosquitto* mosquitto_new(
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// const char *id,//用户自定义标识ID
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// bool clean_session, //断开后是否保留订阅信息true/false
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// void *userdata //回调参数
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// );
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// d可以为NULL，clean_session的标识必须是true, userdata也可以是NULL
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if (client == NULL) {
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printf("创建mqtt客户端失败!\n");
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perror("mosquitto_new\n");
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return -1;
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}
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mosquitto_connect_callback_set(client, connect_callback);
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mosquitto_subscribe_callback_set(client, on_subscribe);
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mosquitto_message_callback_set(client, on_message);
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// 3. 连接mqtt broker
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int flag = mosquitto_connect(client, "10.12.156.19", 1883, 60);
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if (flag == MOSQ_ERR_SUCCESS) {
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printf("-----连接MQTT 服务器成功！-----\n");
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}
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int msgId = 1;
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// 开始订阅信息
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flag = mosquitto_subscribe(client, &msgId, "dht11", 0);
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if (flag == MOSQ_ERR_SUCCESS) {
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printf("订阅消息ID: %d 成功, 等待消息!\n", msgId);
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}
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while (isRunning) {
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// 处理网络事件
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mosquitto_loop_start(client); // 接收网络数据
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usleep(500);
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}
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// 关闭mosquitto的客户端
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mosquitto_destroy(client);
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// 最后清理库环境
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mosquitto_lib_cleanup();
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return 0;
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}
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