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