ESP8266模块连接OneNet云平台（HTTP协议）方法和步骤_onenet http esp8266

Arduino IDE 代码：

#include <ESP8266WiFi.h>        //WiFi驱动库
#include <PubSubClient.h>       //提供MQTT协议
 
//设置OneNet参数
const char* mqttServer = "183.230.40.39";//mqtt服务器
const uint16_t mqttPort = 6002;       //端口号
const char *Device_ID = "1060658288";     //设备ID
const char *Product_ID = "584149";        //产品ID
const char *Api_KEY = "LiVJexVOw4FRbSzo=WYozBpbWvM=";    //鉴权信息
//设置WiFi参数
const char *WiFi_SSID = "";         //WiFi名称
const char *WiFi_Password = "";                  //WiFi密码
 
float Current = 0;
uint8_t Upload_Package[100];
uint32_t Last_Updata_Time = 0;
//创建对象
WiFiClient espClient;
PubSubClient client(espClient);
 
//声明下函数
void WiFi_Init(void);
void MQTT_Init(void);
void MQTT_Reconnection(void);
void MQTT_Callback(char *MQTT_Topic, uint8_t *MQTT_Payload, uint16_t MQTT_Payload_Len);
 
void setup()//setup只执行一次，联网放这里面就行
{
  Serial.begin(115200);//串口初始化
  WiFi_Init();         //WiFi初始化
  MQTT_Init();         //MQTT初始化
}
 
void loop()//loop相当于其他单片机的while(1)
{
  //判断MQTT连接了没,没的话重新连接
  if (!client.connected())
    MQTT_Reconnection();
  if (millis() - Last_Updata_Time >= 3000)//3s发送一次数据
  {
    Last_Updata_Time = millis();
    float ADC_Value = analogRead(A0);
    Current = 25;
    Serial.print("Current: ");
    Serial.print(Current);
    Serial.println("  A\r\n");
    memset(Upload_Package, 0, 100);
    String Json_Buffer = ",;Current,";
    Json_Buffer += String(Current);
    Json_Buffer += ";";
    Upload_Package[0] = 5;
    Upload_Package[1] = highByte(Json_Buffer.length());
    Upload_Package[2] = lowByte(Json_Buffer.length());
    for (int i = 0; i < Json_Buffer.length(); i++)
      Upload_Package[i + 3] = Json_Buffer.c_str()[i];
    
    //若要上传数据,则使用发布函数发布
    //$dp                      ONENT上传数据固定主题
    //Upload_Package           上传的数据数组
    //Json_Buffer.length() + 3 上传的数据长度，因为包含0，使用不能使用strlen计算长度
    client.publish("$dp", Upload_Package, Json_Buffer.length() + 3);
  }
  client.loop();
}
 
//WiFi初始化
void WiFi_Init(void)
{
  Serial.print("\r\n\r\nConnecting to ");
  Serial.print(WiFi_SSID);
  WiFi.mode(WIFI_STA);
  WiFi.begin(WiFi_SSID, WiFi_Password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(" .");
  }
  //打印WiFi连接成功提示语和本机IP地址
  Serial.print("\r\nWiFi Connection Successful.\r\nIP address: ");
  Serial.println(WiFi.localIP());
}
 
//MQTT初始化
void MQTT_Init(void)
{
  client.setServer(mqttServer, mqttPort);
  client.setCallback(MQTT_Callback);
}
 
//收到信息时,会调用这个函数,传入参数含义如下
//MQTT_Topic       收到的消息的主题
//MQTT_Payload     收到的消息的内容
//MQTT_Payload_Len 收到的消息的内容的长度
void MQTT_Callback(char *MQTT_Topic, uint8_t *MQTT_Payload, uint16_t MQTT_Payload_Len)
{
  //此处只进行了打印，没有其余处理操作
  Serial.printf("Topic: %s[%d]:\r\n", MQTT_Topic, MQTT_Payload_Len);
  for (uint16_t i = 0; i < MQTT_Payload_Len; i++)
  {
    Serial.print(MQTT_Payload[i] < 0x10 ? " 0x0" : " 0x");
    Serial.print(MQTT_Payload[i]);
  }
  Serial.println();
}
 
void MQTT_Reconnection(void)
{
  while (!client.connected())
  {
    Serial.println("MQTT Reconnection.");
    if (client.connect(Device_ID, Product_ID, Api_KEY))
      Serial.println("MQTT Connection Successful.");
    else
    {
      Serial.print("Connect Failed, Error Code = ");
      Serial.print(client.state());
      Serial.println(", Try again in 5 seconds.");
      delay(5000);
    }
  }
}

如果报错缺少库，就在这里安装：