RT-Thread-【2024-RSOC】Day 5软件包和组件RT-Thread问答社区

【2024-RSOC】Day 5软件包和组件

发布于 2024-07-30 11:08:44 浏览：95 订阅该版

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# Day 5软件包和组件

## 软件包

### 温湿度传感器——AHT10

添加AHT21软件包
![屏幕截图 2024-07-30 105458.png](https://oss-club.rt-thread.org/uploads/20240730/d62654d43772807f8dc91319bff9724c.png)
开启I2C,并联AHT10

阿里云创建产品和设备
![31c88fb5bb9a274a14abe0b73e141bf1.png.webp](https://oss-club.rt-thread.org/uploads/20240730/edf341e197099f6f1f7d708297ac3ac4.webp)
vs编写代码如下：

```c
#include <board.h>
#include <rtthread.h>
#include <drv_gpio.h>
#include "aht10.h"

// AHT挂载的总线名字
#define AHT10_I2C_BUS "i2c3"
// 创建AHT线程时待用
#define THREAD_PRIORITY 25
#define THREAD_STACK_SIZE 2048
#define THREAD_TIMESLICE 5
// AHT线程指针
rt_thread_t AHT10 = RT_NULL;
// AHT测试样例
void AHT10_Test(void *parameter)
{
    // AHT设备指针
    aht10_device_t Dev = RT_NULL;
    // Humi:湿度值,Temp:温度值
    float Humi, Temp;
    // 初始化设备
    Dev = aht10_init(AHT10_I2C_BUS);
    if (Dev == RT_NULL)
    {
        rt_kprintf("AHT10_init Fail");
        return;
    }
    while (1)
    {
        // 读取温湿度值
        Humi = aht10_read_humidity(Dev);
        Temp = aht10_read_temperature(Dev);
        // 没有下载rt_vsprintf_full软件包的时候
        rt_kprintf("Humi: %d.%d\n", (int)Humi, (int)(Humi * 10) % 10);
        rt_kprintf("Temp: %d.%d\n", (int)Temp, (int)(Temp * 10) % 10);
        // 配合rt_vsnprintf_full软件包使用
        //  rt_kprintf("Humi: %f, Temp: %f\n", Humi, Temp);
        rt_thread_mdelay(1000);
    }
}
void AHT10_Creat_Thread(void)
{
    // 创建线程
    AHT10 = rt_thread_create("AHT10", AHT10_Test, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
    // 创建成功就启动
    if (AHT10 != RT_NULL)
    {
        rt_thread_startup(AHT10);
    }
    else
    {
        rt_kprintf("AHT10_Thread Create Fail");
    }
}
// 导出Shell命令
MSH_CMD_EXPORT(AHT10_Creat_Thread, This Function will creat a AHT10 thread.)
```

### MQTT协议（搭建阿里云平台）

MQTT（Message Queuing Telemetry
Transport）是一种轻量级、基于发布-订阅模式的消息传输协议(基于TCP/IP)。
适用于资源受限的设备和低带宽、高延迟或不稳定的网络环境。
它在物联网应用中广受欢迎，能够实现传感器、执行器和其它设备之间的高效通信。
如果有设备需要获取某个传感器的消息，只需要订阅这个主题就好了。

参考链接：[MQTT 协议入门：基础知识和快速教程 | EMQ (emqx.com)](https://www.emqx.com/zh/blog/the-easiest-guide-to-getting-started-with-mqtt)

## 组件

```c
#include "rtthread.h"
#include "dev_sign_api.h"
#include "mqtt_api.h"
#include <board.h>
#include <drv_gpio.h>
#include <stdio.h>
#include <string.h>
#include "aht10.h"
char DEMO_PRODUCT_KEY[IOTX_PRODUCT_KEY_LEN + 1] = {0};
char DEMO_DEVICE_NAME[IOTX_DEVICE_NAME_LEN + 1] = {0};
char DEMO_DEVICE_SECRET[IOTX_DEVICE_SECRET_LEN + 1] = {0};
void *HAL_Malloc(uint32_t size);
void HAL_Free(void *ptr);
void HAL_Printf(const char *fmt, ...);
int HAL_GetProductKey(char product_key[IOTX_PRODUCT_KEY_LEN + 1]);
int HAL_GetDeviceName(char device_name[IOTX_DEVICE_NAME_LEN + 1]);
int HAL_GetDeviceSecret(char device_secret[IOTX_DEVICE_SECRET_LEN]);
uint64_t HAL_UptimeMs(void);
int HAL_Snprintf(char *str, const int len, const char *fmt, ...);
// AHT挂载的总线名字
#define AHT10_I2C_BUS "i2c3"
    // AHT设备指针
    aht10_device_t Dev = RT_NULL;
    // Humi:湿度值,Temp:温度值
    float Humi, Temp;
#define EXAMPLE_TRACE(fmt, ...)  \
    do { \
        HAL_Printf("%s|%03d :: ", __func__, __LINE__); \
        HAL_Printf(fmt, ##__VA_ARGS__); \
        HAL_Printf("%s", "\r\n"); \
    } while(0)
static void example_message_arrive(void *pcontext, void *pclient, iotx_mqtt_event_msg_pt msg)
{
    iotx_mqtt_topic_info_t     *topic_info = (iotx_mqtt_topic_info_pt) msg->msg;
    switch (msg->event_type) {
        case IOTX_MQTT_EVENT_PUBLISH_RECEIVED:
            /* print topic name and topic message */
            EXAMPLE_TRACE("Message Arrived:");
            EXAMPLE_TRACE("Topic  : %.*s", topic_info->topic_len, topic_info->ptopic);
            EXAMPLE_TRACE("Payload: %.*s", topic_info->payload_len, topic_info->payload);
            EXAMPLE_TRACE("\n");
            break;
        default:
            break;
    }
}
static int example_subscribe(void *handle)
{
    int res = 0;
    const char *fmt = "/%s/%s/user/get";
    char *topic = NULL;
    int topic_len = 0;
    topic_len = strlen(fmt) + strlen(DEMO_PRODUCT_KEY) + strlen(DEMO_DEVICE_NAME) + 1;
    topic = HAL_Malloc(topic_len);
    if (topic == NULL) {
        EXAMPLE_TRACE("memory not enough");
        return -1;
    }
    memset(topic, 0, topic_len);
    HAL_Snprintf(topic, topic_len, fmt, DEMO_PRODUCT_KEY, DEMO_DEVICE_NAME);
    res = IOT_MQTT_Subscribe(handle, topic, IOTX_MQTT_QOS0, example_message_arrive, NULL);
    if (res < 0) {
        EXAMPLE_TRACE("subscribe failed");
        HAL_Free(topic);
        return -1;
    }
    HAL_Free(topic);
    return 0;
}
        char tmp[256];
void tmp_payload(void)
{
     // 读取温湿度值
        Humi = aht10_read_humidity(Dev);
        Temp = aht10_read_temperature(Dev);
        sprintf(tmp, "{\"params\":{\"temperature\":%.2f,\"humidity\":%.2f}}", Temp, Humi);
        rt_kprintf("\n%f %f tmp:%s\n",Humi,Temp,tmp);
        return;
}
static int example_publish(void *handle)
{
    tmp_payload();
    int             res = 0;
    const char     *fmt = "/sys/%s/%s/thing/event/property/post";
    // /k1lyriw1yGj/${deviceName}/user/get
    char           *topic = NULL;
    int             topic_len = 0;
    char           *payload = tmp;
    // strcpy(payload,tmp_payload());
    rt_kprintf("payload:%s\n",payload);
    topic_len = strlen(fmt) + strlen(DEMO_PRODUCT_KEY) + strlen(DEMO_DEVICE_NAME) + 1;
    topic = HAL_Malloc(topic_len);
    if (topic == NULL) {
        EXAMPLE_TRACE("memory not enough");
        return -1;
    }
    memset(topic, 0, topic_len);
    HAL_Snprintf(topic, topic_len, fmt, DEMO_PRODUCT_KEY, DEMO_DEVICE_NAME);
    res = IOT_MQTT_Publish_Simple(0, topic, IOTX_MQTT_QOS0, payload, strlen(payload));
    if (res < 0) {
        EXAMPLE_TRACE("publish failed, res = %d", res);
        HAL_Free(topic);
        return -1;
    }
    HAL_Free(topic);
    return 0;
}
static void example_event_handle(void *pcontext, void *pclient, iotx_mqtt_event_msg_pt msg)
{
    EXAMPLE_TRACE("msg->event_type : %d", msg->event_type);
}
static void mqtt_example_main(void *parameter)
{
    void                   *pclient = NULL;
    int                     res = 0;
    int                     loop_cnt = 0;
    iotx_mqtt_param_t       mqtt_params;
    HAL_GetProductKey(DEMO_PRODUCT_KEY);
    HAL_GetDeviceName(DEMO_DEVICE_NAME);
    HAL_GetDeviceSecret(DEMO_DEVICE_SECRET);
    EXAMPLE_TRACE("mqtt example");
    memset(&mqtt_params, 0x0, sizeof(mqtt_params));
    mqtt_params.handle_event.h_fp = example_event_handle;
    pclient = IOT_MQTT_Construct(&mqtt_params);
    if (NULL == pclient) {
        EXAMPLE_TRACE("MQTT construct failed");
        return ;
    }
    res = example_subscribe(pclient);
    if (res < 0) {
        IOT_MQTT_Destroy(&pclient);
        return ;
    }
    while (1) {
        if (0 == loop_cnt % 20) {
            example_publish(pclient);
        }
        IOT_MQTT_Yield(pclient, 200);
        loop_cnt += 1;
    }
    return ;
}
#define THREAD_PRIORITY 25
#define THREAD_STACK_SIZE 4096
#define THREAD_TIMESLICE 5
rt_thread_t MQTT_Thread = RT_NULL;
void MQTT_Creat_Thread(void)
{
    // 初始化设备
    Dev = aht10_init(AHT10_I2C_BUS);
    if (Dev == RT_NULL)
    {
        rt_kprintf("AHT10_init Fail");
        return;
    }
    MQTT_Thread = rt_thread_create("MTQQ_Thread", mqtt_example_main, RT_NULL, THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
    if (MQTT_Thread != RT_NULL)
    {
        rt_thread_startup(MQTT_Thread);
    }
    else
    {
        rt_kprintf("MQTT Thread Create Failed!\n");
    }
}
MSH_CMD_EXPORT(MQTT_Creat_Thread, create a MQTT_Thread);
```