基于小熊派Hi3861鸿蒙开发的IoT物联网学习【六】--智慧农业MQTT数据上传华为云

本示例将在BearPi-HM_Nano开发板上使用MQTT协议连接华为IoT平台,使用的是E53_IA1 智慧农业扩展板与 BearPi-HM_Nano 开发板。

 

E53_IA1开发板对应方法：

#ifndef __E53_IA1_H__
#define __E53_IA1_H__

/***************************************************************
* 名        称: GasStatus_ENUM
* 说    明：枚举状态结构体
***************************************************************/
typedef enum
{
    OFF = 0,
    ON
} E53_IA1_Status_ENUM;

/* E53_IA1传感器数据类型定义 ------------------------------------------------------------*/
typedef struct
{
    float    Lux;             //光照强度
    float    Humidity;        //湿度
    float    Temperature;     //温度
} E53_IA1_Data_TypeDef;

/* 寄存器宏定义 --------------------------------------------------------------------*/
#define SHT30_Addr 0x44              //十进制

#define BH1750_Addr 0x23

void E53_IA1_Init(void);   //初始化开发板
void E53_IA1_Read_Data(E53_IA1_Data_TypeDef *ReadData); //读取传感器上的数据：温度、湿度、光照  *ReadData 指针变量

void Light_StatusSet(E53_IA1_Status_ENUM status); //灯状态设置 void Motor_StatusSet(E53_IA1_Status_ENUM status);  //电机状态设置 

#endif /* __E53_IA1_H__ */

二、连接平台

### 连接平台
在连接平台前需要设置获取CONFIG_APP_DEVICEID、CONFIG_APP_DEVICEPWD、CONFIG_APP_SERVERIP、CONFIG_APP_SERVERPORT，通过oc_mqtt_profile_connect()函数连接平台。
```c
    WifiConnect(CONFIG_WIFI_SSID, CONFIG_WIFI_PWD);
    dtls_al_init();
    mqtt_al_init();
    oc_mqtt_init();

    g_app_cb.app_msg = queue_create("queue_rcvmsg",10,1);
    if(NULL ==  g_app_cb.app_msg){
        printf("Create receive msg queue failed");

    }
    oc_mqtt_profile_connect_t  connect_para;
    (void) memset( &connect_para, 0, sizeof(connect_para));

    connect_para.boostrap =      0;
    connect_para.device_id =     CONFIG_APP_DEVICEID;
    connect_para.device_passwd = CONFIG_APP_DEVICEPWD;
    connect_para.server_addr =   CONFIG_APP_SERVERIP;
    connect_para.server_port =   CONFIG_APP_SERVERPORT;
    connect_para.life_time =     CONFIG_APP_LIFETIME;
    connect_para.rcvfunc =       msg_rcv_callback;
    connect_para.security.type = EN_DTLS_AL_SECURITY_TYPE_NONE;
    ret = oc_mqtt_profile_connect(&connect_para);
    if((ret == (int)en_oc_mqtt_err_ok)){
        g_app_cb.connected = 1;
        printf("oc_mqtt_profile_connect succed!\r\n");
    }
    else
    {
        printf("oc_mqtt_profile_connect faild!\r\n");
    }
```

三、命令接收

### 推送数据

当需要上传数据时，需要先拼装数据，让后通过oc_mqtt_profile_propertyreport上报数据。代码示例如下： 

```c
static void deal_report_msg(report_t *report)
{
    oc_mqtt_profile_service_t    service;
    oc_mqtt_profile_kv_t         temperature;
    oc_mqtt_profile_kv_t         humidity;
    oc_mqtt_profile_kv_t         luminance;
    oc_mqtt_profile_kv_t         led;
    oc_mqtt_profile_kv_t         motor;

    service.event_time = NULL;
    service.service_id = "Agriculture";
    service.service_property = &temperature;
    service.nxt = NULL;

    temperature.key = "Temperature";
    temperature.value = &report->temp;
    temperature.type = EN_OC_MQTT_PROFILE_VALUE_INT;
    temperature.nxt = &humidity;

    humidity.key = "Humidity";
    humidity.value = &report->hum;
    humidity.type = EN_OC_MQTT_PROFILE_VALUE_INT;
    humidity.nxt = &luminance;

    luminance.key = "Luminance";
    luminance.value = &report->lum;
    luminance.type = EN_OC_MQTT_PROFILE_VALUE_INT;
    luminance.nxt = &led;

    led.key = "LightStatus";
    led.value = g_app_cb.led?"ON":"OFF";
    led.type = EN_OC_MQTT_PROFILE_VALUE_STRING;
    led.nxt = &motor;

    motor.key = "MotorStatus";
    motor.value = g_app_cb.motor?"ON":"OFF";
    motor.type = EN_OC_MQTT_PROFILE_VALUE_STRING;
    motor.nxt = NULL;

    oc_mqtt_profile_propertyreport(USERNAME,&service);
    return;
}
```

代码编译与烧录到开发板

获取数据，后台的log

华为云上接收到开发板的数据---LED指示灯与电机