esp8266连接onenet云平台代码

这里提供一个基础的 ESP8266 连接 OneNet 云平台的代码，需要先在 OneNet 平台上注册设备并获取对应的 API Key。

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>

// 替换为自己的 WiFi 名称和密码
const char* ssid = "your-ssid";
const char* password = "your-password";

// 替换为自己的 OneNet API Key 和设备ID
const char* api_key = "your-api-key";
const char* device_id = "your-device-id";

// OneNet 云平台服务器地址和端口
const char* host = "api.heclouds.com";
const int httpsPort = 443;

// 创建 WiFiClientSecure 对象
WiFiClientSecure client;

void setup() {
  Serial.begin(115200);
  delay(10);

  // 连接 WiFi
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // 设置 WiFiClientSecure 的时间
  client.setInsecure();

  // 连接 OneNet 云平台服务器
  if (!client.connect(host, httpsPort)) {
    Serial.println("connection failed");
    return;
  }

  // 构建 HTTP 请求头
  String url = "/devices/";
  url += device_id;
  url += "/datapoints?type=3";

  String header = "GET ";
  header += url;
  header += " HTTP/1.1\r\n";
  header += "Host: ";
  header += host;
  header += "\r\n";
  header += "api-key: ";
  header += api_key;
  header += "\r\n";
  header += "Connection: close\r\n\r\n";

  // 发送 HTTP 请求头
  client.print(header);

  Serial.println("Request sent");
}

void loop() {
  // 等待服务器响应
  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      Serial.println("Headers received");
      break;
    }
  }

  // 读取服务器响应数据
  while (client.available()) {
    String line = client.readStringUntil('\n');
    Serial.println(line);
  }

  Serial.println("Closing connection");
  client.stop();

  // 等待 10 秒钟再次发送请求
  delay(10000);
  
  // 重新连接 OneNet 云平台服务器
  if (!client.connect(host, httpsPort)) {
    Serial.println("connection failed");
    return;
  }
  
  // 发送 HTTP 请求头
  client.print(header);
  
  Serial.println("Request sent");
}