我需要在IAR中实现

好的，这里提供一个基于IAR Embedded Workbench的ESP8266与ONENET连接的代码示例。请注意，这只是一个简单的示例，您需要根据您的具体情况进行调整。

#include <stdio.h>
#include <string.h>
#include "stm32f10x.h"

#define ESP8266_RX_BUFFER_SIZE 256
#define HTTP_BUFFER_SIZE 1024

uint8_t esp8266_rx_buffer[ESP8266_RX_BUFFER_SIZE];
uint8_t http_buffer[HTTP_BUFFER_SIZE];

uint16_t esp8266_rx_buffer_index = 0;
uint8_t http_buffer_index = 0;

void esp8266_send_command(char* command);
void esp8266_send_data(char* data);
void esp8266_reset_buffer();
void esp8266_parse_response();

void http_request(char* method, char* url, char* api_key, char* data);

int main(void) {
  // 初始化ESP8266模块
  esp8266_send_command("AT+RST"); // 复位ESP8266
  esp8266_send_command("AT+CWMODE=1"); // 设置为Station模式
  esp8266_send_command("AT+CWJAP=\"your_wifi_ssid\",\"your_wifi_password\""); // 连接到WiFi网络

  // 连接到ONENET平台
  esp8266_send_command("AT+CIPMUX=1"); // 允许多路连接
  esp8266_send_command("AT+CIPSTART=0,\"TCP\",\"api.heclouds.com\",80"); // 连接到ONENET服务器

  while (1) {
    // 发送数据到ONENET平台
    char data[32] = "hello world"; // 发送的数据
    http_request("POST", "/devices/your_onenet_device_id/datapoints", "your_onenet_api_key", data);

    delay_ms(10000); // 每10秒发送一次数据
  }
}

void esp8266_send_command(char* command) {
  esp8266_reset_buffer();

  printf("%s\r\n", command);

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '\n') {
        esp8266_parse_response();
        break;
      } else if (c != '\r') {
        esp8266_rx_buffer[esp8266_rx_buffer_index++] = c;
      }
    }
  }
}

void esp8266_send_data(char* data) {
  esp8266_reset_buffer();

  char command[64];
  sprintf(command, "AT+CIPSEND=0,%d", strlen(data));

  printf("%s\r\n", command);

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '>') {
        break;
      }
    }
  }

  printf("%s\r\n", data);

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '\n') {
        esp8266_parse_response();
        break;
      }
    }
  }
}

void esp8266_reset_buffer() {
  memset(esp8266_rx_buffer, 0, ESP8266_RX_BUFFER_SIZE);
  esp8266_rx_buffer_index = 0;
}

void esp8266_parse_response() {
  if (strstr((char*) esp8266_rx_buffer, "OK") != NULL) {
    // 命令执行成功
  } else if (strstr((char*) esp8266_rx_buffer, "ERROR") != NULL) {
    // 命令执行失败
  } else {
    // 其他响应
  }
}

void http_request(char* method, char* url, char* api_key, char* data) {
  esp8266_reset_buffer();

  char request[256];

  sprintf(request, "%s %s HTTP/1.1\r\n", method, url);
  sprintf(request, "%sHost: api.heclouds.com\r\n", request);
  sprintf(request, "%sapi-key: %s\r\n", request, api_key);
  sprintf(request, "%sContent-Type: application/json\r\n", request);
  sprintf(request, "%sContent-Length: %d\r\n", request, strlen(data));
  sprintf(request, "%s\r\n%s", request, data);

  char command[64];
  sprintf(command, "AT+CIPSEND=0,%d", strlen(request));

  printf("%s\r\n", command);

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '>') {
        break;
      }
    }
  }

  printf("%s\r\n", request);

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '\n') {
        http_buffer[http_buffer_index] = '\0';
        break;
      } else {
        http_buffer[http_buffer_index++] = c;
      }
    }
  }

  http_buffer_index = 0;

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '\n') {
        http_buffer[http_buffer_index] = '\0';

        if (http_buffer_index == 1) {
          // 响应头结束
          break;
        }

        http_buffer_index = 0;
      } else {
        http_buffer[http_buffer_index++] = c;
      }
    }
  }

  http_buffer_index = 0;

  while (1) {
    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET) {
      uint8_t c = USART_ReceiveData(USART1);

      if (c == '\n') {
        http_buffer[http_buffer_index] = '\0';
        break;
      } else {
        http_buffer[http_buffer_index++] = c;
      }
    }
  }

  // 解析响应数据
  char* json_start = strstr((char*) http_buffer, "{");
  char* json_end = strstr((char*) http_buffer, "}");

  if (json_start != NULL && json_end != NULL) {
    int json_len = json_end - json_start + 1;
    char json[json_len];
    strncpy(json, json_start, json_len);
    printf("%s\r\n", json);
  }
}

在这个例子中，我们使用STM32F103C8T6开发板和ESP8266模块。我们首先连接到WiFi网络，然后连接到ONENET平台。在`main()`函数中，我们每10秒发送一次数据到ONENET平台。