怎么用C语言对接智能配电箱

2022-12-10 发布浏览：151 次

本文介绍了如何用 C 对接智能配电箱的方法：可以通过接口实现。

智能配电箱

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支持命令

开关	power
先通后断	point
先断后通	reset

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HTTP接口控制以设备控制（向设备下发命令）为例

// First you need to prepare the following values
// 1. AppID (in your console development settings)
// 2. AppSecret (in your console development settings)
// 3. ts (timestamp of the current time, seconds)
// 4. YourSign = md5(md5(AppSecret)ts);(md5 is an encryption method, AppSecret is the AppSecret prepared above, ts is the timestamp prepared above, concatenate the string after the AppSecret after md5 encryption)
// In simple terms, the signature is md5(md5(your developer password)concatenate the above ts timestamp value); ts is the timestamp of the current timestamp; that is, to perform one MD5 on the developer password (AppSecret), then concatenate the timestamp, and then perform one MD5 on the entire concatenated string
// Core request address: api.thingboot.com/AppID/device/control/?sign=YourSign&&ts=ts;
// Request needs to pass two parameters device and order:
// device[string]: unique device ID, can pass multiple [separated by ,], can be viewed in the console, or pulled through the interface
// order[json string]: the command to be issued, for example:
// {"power":1}, usually to connect the circuit of the switch
// {"power3":0}, usually to close the third line of the switch or controller
// {"play:gbk:16":"hello, welcome to visit"}, let the voice speaker report the specified content
// The same type of product, the command is the same, different product types of commands, please view the product manual page of each product
// Note: you must replace the formal AppID and AppSecret with real-time timestamp calculation of the signature, the request must have device device ID and order command

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <curl/curl.h>
#include <openssl/md5.h>

// 计算 MD5 哈希值 md5(md5(开发者密码)拼接上面的ts参数)
void calculate_md5(const char *input, unsigned char *output) {
    MD5_CTX md5Context;
    MD5_Init(&md5Context);
    MD5_Update(&md5Context, input, strlen(input));
    MD5_Final(output, &md5Context);
}

// 将 MD5 哈希值转换为十六进制字符串
void md5_to_hex(const unsigned char *md5_hash, char *hex_string) {
    for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
        sprintf(hex_string + (i * 2), "x", md5_hash[i]);
    }
    hex_string[MD5_DIGEST_LENGTH * 2] = '\0';
}

int main() {
    CURL *curl;
    CURLcode res;

    // 配置参数
    const char *app_id = "开发者ID";  // 替换为实际的 AppID
    const char *app_secret = "开发者密码";  // 替换为实际的 AppSecret
    const char *device_id = "1878";  // 替换为实际的设备ID；可传多个[用,间隔]
    const char *command = "{\"power1\":1}";  // 替换为实际的命令

    // 计算时间戳
    time_t ts = time(NULL);

    // 计算 MD5 哈希值
    unsigned char md5_hash[MD5_DIGEST_LENGTH];
    char md5_hex[MD5_DIGEST_LENGTH * 2 + 1];

    // 计算 app_secret 的 MD5
    calculate_md5(app_secret, md5_hash);
    md5_to_hex(md5_hash, md5_hex);

    // 计算 sign
    char sign_input[strlen(md5_hex) + 20];  // 足够大的缓冲区
    sprintf(sign_input, "%s%ld", md5_hex, ts);
    calculate_md5(sign_input, md5_hash);
    md5_to_hex(md5_hash, md5_hex);

    // 构造请求 URL
    char url[1024];
    snprintf(url, sizeof(url), "https://api.thingboot.com/%s/device/control/?sign=%s&ts=%ld", app_id, md5_hex, ts);

    // 构造请求体
    char post_data[1024];
    snprintf(post_data, sizeof(post_data), "{\"device\":\"%s\",\"order\":%s}", device_id, command);

    // 初始化 libcurl
    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();

    if (curl) {
        // 设置请求 URL
        curl_easy_setopt(curl, CURLOPT_URL, url);

        // 设置请求头
        struct curl_slist *headers = NULL;
        headers = curl_slist_append(headers, "Content-Type: application/json");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

        // 设置请求体
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_data);

        // 执行请求
        res = curl_easy_perform(curl);

        // 检查请求结果
        if (res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        }

        // 清理
        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
    }

    curl_global_cleanup();

    return 0;
}

说明：{AppID}为您的应用ID（由平台生成），免费注册登录后，可在控制台查看；sign和ts的取值，请参考文档。

怎么用C语言对接智能配电箱

智能配电箱

支持命令

产品手册

HTTP接口控制以设备控制（向设备下发命令）为例

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怎么用C语言对接智能配电箱

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智能配电箱

支持命令

产品手册

HTTP接口控制 以设备控制（向设备下发命令）为例

文章：

怎么用C语言对接智能配电箱

相关技术文章：

怎样用C语言对接5位总控插排

如何用C语言对接智能分体控制箱|12路

怎样用C语言对接50A带计量智能电源控制断路器

怎样用C语言对接吸顶式智能人体感应器

怎样用C语言对接2路低压直流控制板

HTTP接口控制以设备控制（向设备下发命令）为例