【7天入门RTOS网络编程】Wendell Day6-7 RTOS网络编程课作业☆☆

发布于 2018-10-26 14:23:22 浏览：1917 订阅该版

* 本帖最后由 san兄弟 于 2018-10-26 15:31 编辑 *

DAY6~7的课程作业终于做好了，来交作业，首先感谢企鹅群友 rt-thread-郭占鑫、蓝槐和Nautilus三位高手的无私帮助！
**1. 题目要求：**观看视频及文档，能够正常获取并运行示例程序，运用所学的知识，获取实时的日期、时间、天气，并把获取的数据通过在 OneNet 云平台创建应用展示出来。首先上图说明已经正常获取并运行了示例程序。![数据上传.jpg](/uploads/201810/26/135530ram2zsaqlt02txa4.jpg)运行例程上传温度数据到onenet
![onenet.jpg](/uploads/201810/26/135529cy89thacyac2259i.jpg)onenet设置
![onenet曲线.jpg](/uploads/201810/26/135529v3zljposrsyplsoj.jpg)onenet数据流曲线
![ntp获取时间.jpg](/uploads/201810/26/135529n1wra77lvt88hu4p.jpg)ntp同步时间
**2. 完成思路：**获取ntp时间； 获取天气数据，并采用cJSON软件包解析； 使用onenet软件包上传数据至中移OneNet云； 在中移OneNet云中展示数据。**3. 具体步骤：**获取ntp时间的例程已经有了，可以很方便的获取到时间；实时天气数据是难点，因为历程中使用的API已经弃用，可以寻找新的API代替，由于时间关系，没能在作业中使用新的API，使用的是例程中的API和数据，待找到新的免费接口后再来补充吧，现在先把原理搞懂。使用onenet软件包上传数据至中移OneNet云以及展示数据都有例程，需要做的就是将例程使用的各函数整合成自己需要的功能。**在做作业的过程中遇到的问题：**例程中上传到中移OneNet云的数据只有temperature一路数据流，当添加多组数据流后出现云端只能收到第一路数据，其他的无法显示的问题，原因是中移OneNet云有数据上传频率限制，解决方法是在各路数据上传之间加微小延时！
上代码。```#include <stdlib.h>
#include <webclient.h> /* 使用 HTTP 协议与服务器通信需要包含此头文件 */
#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
#include <netdb.h>
#include <cJSON.h>
#include <finsh.h>
#include <onenet.h>

#define GET_HEADER_BUFSZ        1024        //头部大小
#define GET_RESP_BUFSZ          1024        //响应缓冲区大小
#define GET_URL_LEN_MAX         256         //网址最大长度
#define GET_URI                 "http://mobile.weather.com.cn/data/sk/%s.html" //获取天气的 API
#define AREA_ID                 "101021300" //上海浦东地区 ID

/* 天气数据解析 */
void my_weather_data_parse(rt_uint8_t *data)
{
    cJSON *root = RT_NULL, *object = RT_NULL, *item = RT_NULL;

root = cJSON_Parse((const char *)data);
 if (!root)
 {
 rt_kprintf("No memory for cJSON root! ");
 return;
 }
 object = cJSON_GetObjectItem(root, "sk_info");

item = cJSON_GetObjectItem(object, "date");
 if (onenet_mqtt_upload_string("date", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"date\":%s}", item->valuestring);
 }

rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "time");
 if (onenet_mqtt_upload_string("time", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"time\":%s}", item->valuestring);
 }
 
 rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "cityName");
 if (onenet_mqtt_upload_string("cityName", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"cityName\":%s}", item->valuestring);
 }

rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "temp");
 if (onenet_mqtt_upload_string("temp", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"temp\":%s}", item->valuestring);
 }

rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "wd");
 if (onenet_mqtt_upload_string("wd", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"wd\":%s}", item->valuestring);
 }

rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "ws");
 if (onenet_mqtt_upload_string("ws", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"ws\":%s}", item->valuestring);
 }

rt_thread_delay(rt_tick_from_millisecond(100));
 item = cJSON_GetObjectItem(object, "sd");
 if (onenet_mqtt_upload_string("sd", item->valuestring) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"sd\":%s}", item->valuestring);
 }

if (root != RT_NULL)
        cJSON_Delete(root);
}

void my_weather(void)
{
    rt_uint8_t *buffer = RT_NULL;
    int resp_status;
    struct webclient_session *session = RT_NULL;
    char *weather_url = RT_NULL;
    int content_length = -1, bytes_read = 0;
    int content_pos = 0;

/* 为 weather_url 分配空间 */
 weather_url = rt_calloc(1, GET_URL_LEN_MAX);
 if (weather_url == RT_NULL)
 {
 rt_kprintf("No memory for weather_url! ");
 goto __exit;
 }
 /* 拼接 GET 网址 */
 rt_snprintf(weather_url, GET_URL_LEN_MAX, GET_URI, AREA_ID);

/* 创建会话并且设置响应的大小 */
 session = webclient_session_create(GET_HEADER_BUFSZ);
 if (session == RT_NULL)
 {
 rt_kprintf("No memory for get header! ");
 goto __exit;
 }

/* 发送 GET 请求使用默认的头部 */
 if ((resp_status = webclient_get(session, weather_url)) != 200)
 {
 rt_kprintf("webclient GET request failed, response(%d) error. ", resp_status);
 goto __exit;
 }

/* 分配用于存放接收数据的缓冲 */
 buffer = rt_calloc(1, GET_RESP_BUFSZ);
 if(buffer == RT_NULL)
 {
 rt_kprintf("No memory for data receive buffer! ");
 goto __exit;
 }

content_length = webclient_content_length_get(session);
 if (content_length < 0)
 {
 /* 返回的数据是分块传输的. */
 do
 {
 bytes_read = webclient_read(session, buffer, GET_RESP_BUFSZ);
 if (bytes_read <= 0)
 {
 break;
 }
 } while (1);
 }
 else
 {
 do
 {
 bytes_read = webclient_read(session, buffer, 
 content_length - content_pos > GET_RESP_BUFSZ ?
 GET_RESP_BUFSZ : content_length - content_pos);
 if (bytes_read <= 0)
 {
 break;
 }
 content_pos += bytes_read;
 } while (content_pos < content_length);
 }

/* 天气数据解析 */
    my_weather_data_parse(buffer);

__exit:
    /* 释放网址空间 */
    if (weather_url != RT_NULL)
        rt_free(weather_url);
    /* 关闭会话 */
    if (session != RT_NULL)
        webclient_close(session);
    /* 释放缓冲区空间 */
    if (buffer != RT_NULL)
        rt_free(buffer);
}

static void my_ntp_sync(void)
{
    char *host_name = NULL;
    time_t cur_time = ntp_sync_to_rtc(host_name);

if (cur_time)
 {
 rt_kprintf("Get local time from NTP server: %s", ctime((const time_t*) &cur_time));
 if (onenet_mqtt_upload_string("ntp-time",ctime((const time_t*) &cur_time)) < 0)
 {
 log_e("upload has an error, stop uploading");
 }
 else
 {
 log_d("buffer : {\"ntp-time\":%s}", ctime((const time_t*) &cur_time));
 }
 rt_thread_delay(rt_tick_from_millisecond(100));

}
}

/* upload data to onenet*/
static void onenet_upload_entry(void *parameter)
{
    int value = 0;

while (1)
    {
        my_ntp_sync();
        my_weather();
        rt_thread_delay(rt_tick_from_millisecond(5 * 1000));
    }
}

int my_onenet_upload_cycle(void)
{
    rt_thread_t tid;

tid = rt_thread_create("onenet_send",
                           onenet_upload_entry,
                           RT_NULL,
                           2 * 1024,
                           RT_THREAD_PRIORITY_MAX / 3 - 1,
                           20);
    if (tid)
    {
        rt_thread_startup(tid);
    }

return 0;
}
MSH_CMD_EXPORT(my_onenet_upload_cycle, send data to OneNET cloud cycle);```              ![homework6_7.zip](/uploads/201810/26/143655ak8byab8u423ykp2.zip)

**4. 运行结果：**![数据.jpg](/uploads/201810/26/141631e5lfobbzzgeel5bn.jpg)正在上传的数据
![数据流展示.jpg](/uploads/201810/26/141631kzwllt9lg019mld1.jpg)中移OneNet云接收到的数据流展示。![数据展示1.jpg](/uploads/201810/26/142235lbry3akb9brakr1n.jpg)![数据展示2.jpg](/uploads/201810/26/142235ixac5x1z38z8y8c8.jpg)![数据展示3.jpg](/uploads/201810/26/142235upwp6m6womsvffgw.jpg)

虽然天气数据一直在上报，但是由于数据一直没有改变，因此看不出来效果，只有上报的ntp时间是变化的，因此贴个视频来表明数据在传输。![2018-10-26_14-15-04.gif](/uploads/201810/26/141630cxvvyvgy6o5wvrny.gif)时间是有变化的，成功！