Haas 开发板连接阿里云上传温湿度和电池电压

目录

一、在阿里云上创建一个产品

二、开发环境的介绍

三、创建wifi示例

四、编写SI7006和ADC驱动

五、wifi配网

六、主要源码

七、查看实现结果

---

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一、在阿里云上创建一个产品

---

登录自己的阿里云账号， 应该支付宝，淘宝账号都是可以的。

接着根据需求创建一个同类型的产品，在为该类型的产品实例化出一个具体的设备出来。最后为设备添加属性。

具体的步骤： 物联网平台 (aliyun.com)

二、开发环境的介绍

---

本次实验的开发环境的信息如下： 

软件环境： Ubuntu 16.04 vscode vscode内部的Haas-studio插件 Alios Things SDK  version-3.3

硬件环境： Haas EDU开发板

• Haas开发板介绍

三、创建wifi示例

---

四、编写SI7006和ADC驱动

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驱动都是Alios ThingsSDK写好的， 不太熟悉Alios Things的伙伴可以去我的之前的文章看看。

• ADC驱动

#include 
#include 




float get_battery(){

    char name[16]={0};
    int32_t fd = 0;
    int i;
    io_adc_arg_t adc_arg;

    float voltage;
    int sum=0;
    snprintf(name,sizeof(name),"/dev/adc1");
    fd = open(name,0);
    if(fd>=0){
        ioctl(fd,IOC_ADC_START,100);
        aos_msleep(1);
        sum=0;
        for(i=0;i<10;i++){
            ioctl(fd,IOC_ADC_GET_VALUE,&adc_arg);
            sum += adc_arg.value;

        }


        ioctl(fd,IOC_ADC_GET_VALUE,&adc_arg);
        voltage = (float)sum/10;
        voltage = voltage*3;
        //printf("read v=%f\n",voltage/1000);
        aos_msleep(1);
        ioctl(fd,IOC_ADC_STOP,0);
        close(fd);
        return voltage/1000;

    }


}

ADC的驱动支持基于HAL层API的开发， 也支持基于VFS的开发， 熟悉linux编程的伙伴， 就会很容易的上手。

• SI7006温湿度传感器的驱动

#include "aos/hal/i2c.h"
#include "aos/hal/gpio.h"

#define Si7006_ADDRESS     0x40   
#define Si7006_MEAS_REL_HUMIDITY_NO_MASTER_MODE   0xF5
#define Si7006_MEAS_REL_TEMP_NO_MASTER_MODE       0xF3
i2c_dev_t  i2c_dev;


void si7006_init(){
    i2c_dev.port    =   1;
    i2c_dev.config.address_width = I2C_HAL_ADDRESS_WIDTH_7BIT;
    i2c_dev.config.freq          =  I2C_BUS_BIT_RATES_400K;
    i2c_dev.config.mode          =  I2C_MODE_MASTER;
    i2c_dev.config.dev_addr      =  Si7006_ADDRESS;
    hal_i2c_init(&i2c_dev);
}

int si7006_getTemperature(float *tempration){
    uint8_t reg = Si7006_MEAS_REL_TEMP_NO_MASTER_MODE;
    uint8_t  read_data[2] = {0};
    uint32_t value;

    hal_i2c_master_send(&i2c_dev,i2c_dev.config.dev_addr,®,1,1000);
    aos_msleep(30);
    hal_i2c_master_recv(&i2c_dev,i2c_dev.config.dev_addr,read_data,2,1000);

    value = (read_data[0]<<8)|read_data[1];

    *tempration = (175.72f*(float)value)/65536.0f - 46.85f;

    return 0;


}

int si7006_getHumidity(float *Humidity){

    uint8_t reg = Si7006_MEAS_REL_HUMIDITY_NO_MASTER_MODE;
    uint8_t  read_data[2] = {0};
    uint32_t value;

    hal_i2c_master_send(&i2c_dev,i2c_dev.config.dev_addr,®,1,1000);
    aos_msleep(30);
    hal_i2c_master_recv(&i2c_dev,i2c_dev.config.dev_addr,read_data,2,1000);
    value = (read_data[0]<<8)|read_data[1];
    *Humidity = (125.0f*(float)value)/65536.0f - 6.0f;
    return 0;


}

五、wifi配网

---

在开发板启动之后， 进入CLI模式， 即可与开发板交互， 开发板配网的流程命令如下：

netmgr  -t wifi  -i                   #初始化
netmgr –t wifi  -c ssid password      #连接wifi， ssid为wifi名称， passwd密码

六、主要源码

---

/*
 * Copyright (C) 2015-2020 Alibaba Group Holding Limited
 */
/**
 * @file main.c
 *
 * This file includes the entry code of link sdk related demo
 *
 */

#include 
#include 
#include 
#include "netmgr.h"
#include 
#include 
#include "aos/hal/adc.h"
#include 
#include 
#include 
#include 
#include "aos/hal/i2c.h"
#include "aos/hal/gpio.h"


float temperature, humidity, voltage;

extern int demo_main(int argc, char *argv[]);

static int _ip_got_finished = 0;
io_adc_arg_t io_adc_arg;

float get_battery(void)
{
    int fd = -1;
    char dev_name[128] = {0};
    float ret_value = 0;

    snprintf(dev_name, sizeof(dev_name), "/dev/adc1");

    fd = open(dev_name, 0);
    if(fd < 0) {
        perror(open);
    }

    ioctl(fd, IOC_ADC_START, &io_adc_arg);
    aos_msleep(1);
    ioctl(fd, IOC_ADC_GET_VALUE, &io_adc_arg);

    ret_value = (float)io_adc_arg.value / 1000 * 3;
    ioctl(fd, IOC_ADC_STOP, &io_adc_arg);

    close(fd);
   // printf("%d\n", io_adc_arg.value);
    //printf("%f\n", ret_value);
    return ret_value;
}

#define SI7006_DEVICE_ADDR (0x40)
#define SI7006_TEMP_CMD (0XF3)
#define SI7006_HUMI_CMD (0XF5)

/* i2c handle*/
i2c_dev_t i2c_dev;

void Si7006_Init(void)
{
    i2c_dev.port = 1;
    i2c_dev.config.address_width = I2C_HAL_ADDRESS_WIDTH_7BIT;
    i2c_dev.config.freq = I2C_BUS_BIT_RATES_400K;
    i2c_dev.config.mode = I2C_MODE_MASTER;
    i2c_dev.config.dev_addr = SI7006_DEVICE_ADDR;

    hal_i2c_init(&i2c_dev);
}

int GetTemperature(float * temperature) 
{
    int ret;
    uint8_t reg = SI7006_TEMP_CMD;
    uint8_t data_buf[2] = {0};
    short value;

    /**/
    ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
    if(ret != 0) {
        int i = 0;
        for(; i < 3; i++) {
            ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
        }
        if(ret != 0) {
            printf("hal_i2c_master_send failed !\n");
            return -1;
        }
    }

    aos_msleep(30);

    ret = hal_i2c_master_recv(&i2c_dev, i2c_dev.config.dev_addr, data_buf, 2, 1000);
    if(ret != 0) {
        int i = 0;
        for(; i < 3; i++) {
            ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
        }
        if(ret != 0) {
            printf("hal_i2c_master_recv failed !\n");
            return -1;
        }
    }

    value = (data_buf[0] << 8) | data_buf[1];

    *temperature = (175.72 * (value) / 65536) - 46.85;

    return 0;
}

int GetHumidity(float* humidity) 
{
    int ret;
    short value;
    uint8_t reg = SI7006_HUMI_CMD;
    uint8_t data_buf[2] = {0};

    ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
    if(ret != 0) {
        int i = 0;
        for(; i < 3; i++) {
            ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
        }
        if(ret != 0) {
            printf("hal_i2c_master_send failed !\n");
            return -1;
        }
    }

    aos_msleep(30);

    ret = hal_i2c_master_recv(&i2c_dev, i2c_dev.config.dev_addr, data_buf, 2, 1000);
    if(ret != 0) {
        int i = 0;
        for(; i < 3; i++) {
            ret = hal_i2c_master_send(&i2c_dev, i2c_dev.config.dev_addr, ®, 1, 1000);
        }
        if(ret != 0) {
            printf("hal_i2c_master_recv failed !\n");
            return -1;
        }
    }

    value = (data_buf[0] << 8) | data_buf[1];

    *humidity = (125.0 * (value) / 65536.0) - 6;

    return 0;
}


static void entry_func(void *data)
{
    demo_main(0 , NULL);
}
static void wifi_event_cb(uint32_t event_id, const void *param, void *context)
{
    aos_task_t task;
    aos_status_t ret;
    if (event_id != EVENT_NETMGR_DHCP_SUCCESS)
        return;

    if (_ip_got_finished != 0)
        return;

    _ip_got_finished = 1;
    ret = aos_task_create(&task, "linksdk_demo", entry_func,
                          NULL, NULL, 6048, AOS_DEFAULT_APP_PRI, AOS_TASK_AUTORUN);
    if (ret < 0) {
        printf("create linksdk demo task failed, ret = %ld \r\n", ret);
    }
}

int application_start(int argc, char *argv[])
{
    aos_set_log_level(AOS_LL_DEBUG);
    event_service_init(NULL);

    netmgr_service_init(NULL);
    netmgr_set_auto_reconnect(NULL, true);
    netmgr_wifi_set_auto_save_ap(true);


    event_subscribe(EVENT_NETMGR_DHCP_SUCCESS, wifi_event_cb, NULL);

    Si7006_Init();
    char buf[128] = {0};

    while (1) {
        GetTemperature(&temperature);

        GetHumidity(&humidity);
        voltage = get_battery();
        aos_msleep(1000);

       // printf("temprature: %0.2f\n", temperature);
        //printf("humidity: %0.2f\n", humidity);
        //printf("voltage: %.02f\n", voltage);
    }




    return 0;
}

/*
 * 这个例程演示了用SDK配置MQTT参数并建立连接, 之后创建2个线程
 *
 * + 一个线程用于保活长连接
 * + 一个线程用于接收消息, 并在有消息到达时进入默认的数据回调, 在连接状态变化时进入事件回调
 *
 * 接着演示了在MQTT连接上进行属性上报, 事件上报, 以及处理收到的属性设置, 服务调用, 取消这些代码段落的注释即可观察运行效果
 *
 * 需要用户关注或修改的部分, 已经用 TODO 在注释中标明
 *
 */

#include 
#include 
#include 
#include 

#include "aiot_state_api.h"
#include "aiot_sysdep_api.h"
#include "aiot_mqtt_api.h"
#include "aiot_dm_api.h"

extern float temperature, humidity, voltage;

/* 位于portfiles/aiot_port文件夹下的系统适配函数集合 */
extern aiot_sysdep_portfile_t g_aiot_sysdep_portfile;

/* 位于external/ali_ca_cert.c中的服务器证书 */
extern const char *ali_ca_cert;


static uint8_t g_mqtt_process_thread_running = 0;
static uint8_t g_mqtt_recv_thread_running = 0;

/* TODO: 如果要关闭日志, 就把这个函数实现为空, 如果要减少日志, 可根据code选择不打印
 *
 * 例如: [1577589489.033][LK-0317] mqtt_basic_demo&a13FN5TplKq
 *
 * 上面这条日志的code就是0317(十六进制), code值的定义见core/aiot_state_api.h
 *
 */

/* 日志回调函数, SDK的日志会从这里输出 */
int32_t demo_state_logcb(int32_t code, char *message)
{
    printf("%s", message);
    return 0;
}

/* MQTT事件回调函数, 当网络连接/重连/断开时被触发, 事件定义见core/aiot_mqtt_api.h */
void demo_mqtt_event_handler(void *handle, const aiot_mqtt_event_t *event, void *userdata)
{
    switch (event->type) {
        /* SDK因为用户调用了aiot_mqtt_connect()接口, 与mqtt服务器建立连接已成功 */
        case AIOT_MQTTEVT_CONNECT: {
            printf("AIOT_MQTTEVT_CONNECT\n");
        }
        break;

        /* SDK因为网络状况被动断连后, 自动发起重连已成功 */
        case AIOT_MQTTEVT_RECONNECT: {
            printf("AIOT_MQTTEVT_RECONNECT\n");
        }
        break;

        /* SDK因为网络的状况而被动断开了连接, network是底层读写失败, heartbeat是没有按预期得到服务端心跳应答 */
        case AIOT_MQTTEVT_DISCONNECT: {
            char *cause = (event->data.disconnect == AIOT_MQTTDISCONNEVT_NETWORK_DISCONNECT) ? ("network disconnect") :
                          ("heartbeat disconnect");
            printf("AIOT_MQTTEVT_DISCONNECT: %s\n", cause);
        }
        break;

        default: {

        }
    }
}

/* 执行aiot_mqtt_process的线程, 包含心跳发送和QoS1消息重发 */
void *demo_mqtt_process_thread(void *args)
{
    int32_t res = STATE_SUCCESS;

    while (g_mqtt_process_thread_running) {
        res = aiot_mqtt_process(args);
        if (res == STATE_USER_INPUT_EXEC_DISABLED) {
            break;
        }
        aos_msleep(1000);
    }
    return NULL;
}

/* 执行aiot_mqtt_recv的线程, 包含网络自动重连和从服务器收取MQTT消息 */
void *demo_mqtt_recv_thread(void *args)
{
    int32_t res = STATE_SUCCESS;

    while (g_mqtt_recv_thread_running) {
        res = aiot_mqtt_recv(args);
        if (res < STATE_SUCCESS) {
            if (res == STATE_USER_INPUT_EXEC_DISABLED) {
                break;
            }
            aos_msleep(1000);
        }
    }
    return NULL;
}

/* 用户数据接收处理回调函数 */
static void demo_dm_recv_handler(void *dm_handle, const aiot_dm_recv_t *recv, void *userdata)
{
    printf("demo_dm_recv_handler, type = %d\r\n", recv->type);

    switch (recv->type) {

        /* 属性上报, 事件上报, 获取期望属性值或者删除期望属性值的应答 */
        case AIOT_DMRECV_GENERIC_REPLY: {
            printf("msg_id = %d, code = %d, data = %.*s, message = %.*s\r\n",
                   recv->data.generic_reply.msg_id,
                   recv->data.generic_reply.code,
                   recv->data.generic_reply.data_len,
                   recv->data.generic_reply.data,
                   recv->data.generic_reply.message_len,
                   recv->data.generic_reply.message);
        }
        break;

        /* 属性设置 */
        case AIOT_DMRECV_PROPERTY_SET: {
            printf("msg_id = %ld, params = %.*s\r\n",
                   (unsigned long)recv->data.property_set.msg_id,
                   recv->data.property_set.params_len,
                   recv->data.property_set.params);

            /* TODO: 以下代码演示如何对来自云平台的属性设置指令进行应答, 用户可取消注释查看演示效果 */
            /*
            {
                aiot_dm_msg_t msg;

                memset(&msg, 0, sizeof(aiot_dm_msg_t));
                msg.type = AIOT_DMMSG_PROPERTY_SET_REPLY;
                msg.data.property_set_reply.msg_id = recv->data.property_set.msg_id;
                msg.data.property_set_reply.code = 200;
                msg.data.property_set_reply.data = "{}";
                int32_t res = aiot_dm_send(dm_handle, &msg);
                if (res < 0) {
                    printf("aiot_dm_send failed\r\n");
                }
            }
            */
        }
        break;

        /* 异步服务调用 */
        case AIOT_DMRECV_ASYNC_SERVICE_INVOKE: {
            printf("msg_id = %ld, service_id = %s, params = %.*s\r\n",
                   (unsigned long)recv->data.async_service_invoke.msg_id,
                   recv->data.async_service_invoke.service_id,
                   recv->data.async_service_invoke.params_len,
                   recv->data.async_service_invoke.params);

            /* TODO: 以下代码演示如何对来自云平台的异步服务调用进行应答, 用户可取消注释查看演示效果
             *
             * 注意: 如果用户在回调函数外进行应答, 需要自行保存msg_id, 因为回调函数入参在退出回调函数后将被SDK销毁, 不可以再访问到
             */

            /*
            {
                aiot_dm_msg_t msg;

                memset(&msg, 0, sizeof(aiot_dm_msg_t));
                msg.type = AIOT_DMMSG_ASYNC_SERVICE_REPLY;
                msg.data.async_service_reply.msg_id = recv->data.async_service_invoke.msg_id;
                msg.data.async_service_reply.code = 200;
                msg.data.async_service_reply.service_id = "ToggleLightSwitch";
                msg.data.async_service_reply.data = "{\"dataA\": 20}";
                int32_t res = aiot_dm_send(dm_handle, &msg);
                if (res < 0) {
                    printf("aiot_dm_send failed\r\n");
                }
            }
            */
        }
        break;

        /* 同步服务调用 */
        case AIOT_DMRECV_SYNC_SERVICE_INVOKE: {
            printf("msg_id = %ld, rrpc_id = %s, service_id = %s, params = %.*s\r\n",
                   (unsigned long)recv->data.sync_service_invoke.msg_id,
                   recv->data.sync_service_invoke.rrpc_id,
                   recv->data.sync_service_invoke.service_id,
                   recv->data.sync_service_invoke.params_len,
                   recv->data.sync_service_invoke.params);

            /* TODO: 以下代码演示如何对来自云平台的同步服务调用进行应答, 用户可取消注释查看演示效果
             *
             * 注意: 如果用户在回调函数外进行应答, 需要自行保存msg_id和rrpc_id字符串, 因为回调函数入参在退出回调函数后将被SDK销毁, 不可以再访问到
             */

            /*
            {
                aiot_dm_msg_t msg;

                memset(&msg, 0, sizeof(aiot_dm_msg_t));
                msg.type = AIOT_DMMSG_SYNC_SERVICE_REPLY;
                msg.data.sync_service_reply.rrpc_id = recv->data.sync_service_invoke.rrpc_id;
                msg.data.sync_service_reply.msg_id = recv->data.sync_service_invoke.msg_id;
                msg.data.sync_service_reply.code = 200;
                msg.data.sync_service_reply.service_id = "SetLightSwitchTimer";
                msg.data.sync_service_reply.data = "{}";
                int32_t res = aiot_dm_send(dm_handle, &msg);
                if (res < 0) {
                    printf("aiot_dm_send failed\r\n");
                }
            }
            */
        }
        break;

        /* 下行二进制数据 */
        case AIOT_DMRECV_RAW_DATA: {
            printf("raw data len = %d\r\n", recv->data.raw_data.data_len);
            /* TODO: 以下代码演示如何发送二进制格式数据, 若使用需要有相应的数据透传脚本部署在云端 */
            /*
            {
                aiot_dm_msg_t msg;
                uint8_t raw_data[] = {0x01, 0x02};

                memset(&msg, 0, sizeof(aiot_dm_msg_t));
                msg.type = AIOT_DMMSG_RAW_DATA;
                msg.data.raw_data.data = raw_data;
                msg.data.raw_data.data_len = sizeof(raw_data);
                aiot_dm_send(dm_handle, &msg);
            }
            */
        }
        break;

        /* 二进制格式的同步服务调用, 比单纯的二进制数据消息多了个rrpc_id */
        case AIOT_DMRECV_RAW_SYNC_SERVICE_INVOKE: {
            printf("raw sync service rrpc_id = %s, data_len = %d\r\n",
                   recv->data.raw_service_invoke.rrpc_id,
                   recv->data.raw_service_invoke.data_len);
        }
        break;

        default:
            break;
    }
}

/* 属性上报函数演示 */
int32_t demo_send_property_post(void *dm_handle, char *params)
{
    aiot_dm_msg_t msg;

    memset(&msg, 0, sizeof(aiot_dm_msg_t));
    msg.type = AIOT_DMMSG_PROPERTY_POST;
    msg.data.property_post.params = params;

    return aiot_dm_send(dm_handle, &msg);
}

/* 事件上报函数演示 */
int32_t demo_send_event_post(void *dm_handle, char *event_id, char *params)
{
    aiot_dm_msg_t msg;

    memset(&msg, 0, sizeof(aiot_dm_msg_t));
    msg.type = AIOT_DMMSG_EVENT_POST;
    msg.data.event_post.event_id = event_id;
    msg.data.event_post.params = params;

    return aiot_dm_send(dm_handle, &msg);
}

/* 演示了获取属性LightSwitch的期望值, 用户可将此函数加入到main函数中运行演示 */
int32_t demo_send_get_desred_requset(void *dm_handle)
{
    aiot_dm_msg_t msg;

    memset(&msg, 0, sizeof(aiot_dm_msg_t));
    msg.type = AIOT_DMMSG_GET_DESIRED;
    msg.data.get_desired.params = "[\"LightSwitch\"]";

    return aiot_dm_send(dm_handle, &msg);
}

/* 演示了删除属性LightSwitch的期望值, 用户可将此函数加入到main函数中运行演示 */
int32_t demo_send_delete_desred_requset(void *dm_handle)
{
    aiot_dm_msg_t msg;

    memset(&msg, 0, sizeof(aiot_dm_msg_t));
    msg.type = AIOT_DMMSG_DELETE_DESIRED;
    msg.data.get_desired.params = "{\"LightSwitch\":{}}";

    return aiot_dm_send(dm_handle, &msg);
}


int demo_main(int argc, char *argv[])
{
    int32_t     res = STATE_SUCCESS;
    void       *dm_handle = NULL;
    void       *mqtt_handle = NULL;
    char       *url = "iot-as-mqtt.cn-shanghai.aliyuncs.com"; /* 阿里云平台上海站点的域名后缀 */
    char        host[100] = {0}; /* 用这个数组拼接设备连接的云平台站点全地址, 规则是 ${productKey}.iot-as-mqtt.cn-shanghai.aliyuncs.com */
    uint16_t    port = 443;      /* 无论设备是否使用TLS连接阿里云平台, 目的端口都是443 */
    aiot_sysdep_network_cred_t cred; /* 安全凭据结构体, 如果要用TLS, 这个结构体中配置CA证书等参数 */

    /* TODO: 替换为自己设备的三元组 */
    char *product_key       = "k0t0ptohSB3";
    char *device_name       = "hass_humi_temp_test";
    char *device_secret     = "7f50a6537f5acfd13bd1a133a90a40ec";

    /* 配置SDK的底层依赖 */
    aiot_sysdep_set_portfile(&g_aiot_sysdep_portfile);
    /* 配置SDK的日志输出 */
    aiot_state_set_logcb(demo_state_logcb);

    /* 创建SDK的安全凭据, 用于建立TLS连接 */
    memset(&cred, 0, sizeof(aiot_sysdep_network_cred_t));
    cred.option = AIOT_SYSDEP_NETWORK_CRED_SVRCERT_CA;  /* 使用RSA证书校验MQTT服务端 */
    cred.max_tls_fragment = 16384; /* 最大的分片长度为16K, 其它可选值还有4K, 2K, 1K, 0.5K */
    cred.sni_enabled = 1;                               /* TLS建连时, 支持Server Name Indicator */
    cred.x509_server_cert = ali_ca_cert;                 /* 用来验证MQTT服务端的RSA根证书 */
    cred.x509_server_cert_len = strlen(ali_ca_cert);     /* 用来验证MQTT服务端的RSA根证书长度 */

    /* 创建1个MQTT客户端实例并内部初始化默认参数 */
    mqtt_handle = aiot_mqtt_init();
    if (mqtt_handle == NULL) {
        printf("aiot_mqtt_init failed\n");
        return -1;
    }

    snprintf(host, 100, "%s.%s", product_key, url);
    /* 配置MQTT服务器地址 */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_HOST, (void *)host);
    /* 配置MQTT服务器端口 */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_PORT, (void *)&port);
    /* 配置设备productKey */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_PRODUCT_KEY, (void *)product_key);
    /* 配置设备deviceName */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_DEVICE_NAME, (void *)device_name);
    /* 配置设备deviceSecret */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_DEVICE_SECRET, (void *)device_secret);
    /* 配置网络连接的安全凭据, 上面已经创建好了 */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_NETWORK_CRED, (void *)&cred);
    /* 配置MQTT事件回调函数 */
    aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_EVENT_HANDLER, (void *)demo_mqtt_event_handler);

    /* 创建DATA-MODEL实例 */
    dm_handle = aiot_dm_init();
    if (dm_handle == NULL) {
        printf("aiot_dm_init failed");
        return -1;
    }
    /* 配置MQTT实例句柄 */
    aiot_dm_setopt(dm_handle, AIOT_DMOPT_MQTT_HANDLE, mqtt_handle);
    /* 配置消息接收处理回调函数 */
    aiot_dm_setopt(dm_handle, AIOT_DMOPT_RECV_HANDLER, (void *)demo_dm_recv_handler);

    /* 与服务器建立MQTT连接 */
    res = aiot_mqtt_connect(mqtt_handle);
    if (res < STATE_SUCCESS) {
        /* 尝试建立连接失败, 销毁MQTT实例, 回收资源 */
        aiot_mqtt_deinit(&mqtt_handle);
        printf("aiot_mqtt_connect failed: -0x%04X\n", -res);
        return -1;
    }

    /* 创建一个单独的线程, 专用于执行aiot_mqtt_process, 它会自动发送心跳保活, 以及重发QoS1的未应答报文 */
    g_mqtt_process_thread_running = 1;
    res = aos_task_new("demo_mqtt_process", demo_mqtt_process_thread, mqtt_handle, 4096);
    // res = pthread_create(&g_mqtt_process_thread, NULL, demo_mqtt_process_thread, mqtt_handle);
    if (res != 0) {
        printf("create demo_mqtt_process_thread failed: %d\n", res);
        return -1;
    }

    /* 创建一个单独的线程用于执行aiot_mqtt_recv, 它会循环收取服务器下发的MQTT消息, 并在断线时自动重连 */
    g_mqtt_recv_thread_running = 1;
    res = aos_task_new("demo_mqtt_process", demo_mqtt_recv_thread, mqtt_handle, 4096);
    // res = pthread_create(&g_mqtt_recv_thread, NULL, demo_mqtt_recv_thread, mqtt_handle);
    if (res != 0) {
        printf("create demo_mqtt_recv_thread failed: %d\n", res);
        return -1;
    }
    char buf[128] = {0};

    /* 主循环进入休眠 */
    while (1) {
        sprintf(buf, "{\"CurrentTemperature\": %f}", temperature);
        demo_send_property_post(dm_handle, buf);
        sprintf(buf, "{\"CurrentHumidity\": %f}", humidity);
        demo_send_property_post(dm_handle, buf);
        sprintf(buf, "{\"CurrentVoltage\": %f}", voltage);
        demo_send_property_post(dm_handle, buf);


        demo_send_event_post(dm_handle, "Error", "{\"ErrorCode\": 0}");

        aos_msleep(10000);
    }

    /* 断开MQTT连接, 一般不会运行到这里 */
    res = aiot_mqtt_disconnect(mqtt_handle);
    if (res < STATE_SUCCESS) {
        aiot_mqtt_deinit(&mqtt_handle);
        printf("aiot_mqtt_disconnect failed: -0x%04X\n", -res);
        return -1;
    }

    /* 销毁DATA-MODEL实例, 一般不会运行到这里 */
    res = aiot_dm_deinit(&dm_handle);
    if (res < STATE_SUCCESS) {
        printf("aiot_dm_deinit failed: -0x%04X\n", -res);
        return -1;
    }

    /* 销毁MQTT实例, 一般不会运行到这里 */
    res = aiot_mqtt_deinit(&mqtt_handle);
    if (res < STATE_SUCCESS) {
        printf("aiot_mqtt_deinit failed: -0x%04X\n", -res);
        return -1;
    }

    g_mqtt_process_thread_running = 0;
    g_mqtt_recv_thread_running = 0;

    return 0;
}

七、查看实现结果

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