推薦使用本文之前有一定的嵌入式基礎，請先確保了解以下名詞（提前百度）：cJSON，EDP，TCP透傳

首先在ONENET平臺上創建一個TCP透傳的產品，這段在ONENET開發者中心上有很多教程，就不再贅述。

下載一個EdpProtoDebugger

先使用這個工具與ONENET建立連接，具體教程

可以看到，實際上建立與平臺的連接就是通過一個簡單的EDP數據包實現的，我們在嵌入式應用中，只需要先和ONENET的服務器連接，然后發送這一串設備認證的數據包，你的設備就上線了，之后就可以通過發送JSON格式的數據或者是發送分號間隔字符串的方式來進行數據傳輸

tip：本文只介紹以分號間隔字符串的方式發送數據，ONENET服務器下發的命令是JSON 格式的，如果想給設備下發命令，需要移植cJSON解碼。

使用的芯片是stm32f103c8t6，正點原子的esp8266模塊

開始講解程序

#include "esp8266.h"

uint8_t rxbuffer[200];

uint8_t its2=2;

uint8_t checksd[]={0X10,0X31,0X00,0X03,0X45,0X44,0X50,0X01,0X40,0X00,0X80,0X00,0X08,0X32,0X33,0X37,0X37,0X36,0X31,0X34,0X37,0X00,0X1C,

0X62,0X68,0X35,0X42,0X34,0X63,0X4A,0X53,0X4F,0X52,0X79,0X31,0X59,0X56,0X6F, 0X4E ,0X45, 0X30, 0X4B, 0X7A, 0X6C, 0X54, 0X6F, 0X64,

0X6D, 0X67, 0X34, 0X3D };  //Log in Message Get From EDPDEBUGGER

//--------------------DO NOT USE THIS FUNCTION WHILE SENDING DATA !-------------------------------

void Uart_To_Oled(void) //read uart rxbuffer and print it in OLED  

{

// OLED_CLS();

USART1->DR=0x0000;

HAL_UART_Receive(&huart1,rxbuffer,200,1000);

OLED_ShowStr(0,0,rxbuffer,1);

memset(rxbuffer,0,sizeof(uint8_t)*200);

}

//------------------------------------------------------------------------------------------------

/*********************Initialize Esp8266*******************************************

****** AT **************  return  OK         *************************************

******  AT+CWMODE=3******  AP+STATION MODE    *************************************

******  AT+RST***********  RESET TO INIT CHANGE ***********************************

******  AT+CWJAP*********  JOIN AP             ************************************

******  AT+CIFSR*********  return AP INFORMATION **********************************

******  AT+CIPSTART x 5**  CONNECT TO SERVER     **********************************

******  AT+CIPMODE=1*****  EDP MODE             ***********************************

**********************************************************************************/

void esp8266_Init(void) 

{

    HAL_UART_Transmit(&huart1, CMD_AT,strlen(CMD_AT),1000);

Uart_To_Oled();

    HAL_Delay(200);

    HAL_UART_Transmit(&huart1, CMD_CWMODE,strlen(CMD_CWMODE),1000);

Uart_To_Oled();

    HAL_Delay(200);

    HAL_UART_Transmit(&huart1, CMD_RST,strlen(CMD_RST),1000);

Uart_To_Oled();

    HAL_Delay(200);

//   HAL_UART_Transmit(&huart1, CMD_CWJAP,strlen(CMD_CWJAP),1000);

// Uart_To_Oled();

//   HAL_Delay(1000);

    HAL_UART_Transmit(&huart1, CMD_CIFSR,strlen(CMD_CIFSR),1000);

Uart_To_Oled();

    HAL_Delay(5000);

// OLED_CLS();

// static uint8_t is=5;

// while(is!=0)

// {

HAL_UART_Transmit(&huart1, CMD_CIPSTART,strlen(CMD_CIPSTART),1000);

Uart_To_Oled();

HAL_Delay(200);

// OLED_CLS();

// is--;

// }

    HAL_UART_Transmit(&huart1, CMD_CIPMODE,strlen(CMD_CIPMODE),1000);

Uart_To_Oled();

    HAL_Delay(200);

HAL_UART_Transmit(&huart1, CMD_CIPSEND,strlen(CMD_CIPSEND),1000);

Uart_To_Oled();

HAL_Delay(200);

// while(its2!=0)

// {

HAL_Delay(100);

HAL_UART_Transmit(&huart1, checksd,sizeof(checksd),1000);

// Uart_To_Oled();

//OLED_CLS();

// its2--;

// }

// OLED_CLS();

}

因為只是一個簡單的demo，這里沒有移植完整的EDP數據包生成和解包函數，僅僅是用EdpPrototypeDebugger生成了一個固定的數據包，這個數據包連接到的是我預先創建好的測試設備，請自行更改數據包

測試部分，使用了stm32中自帶的溫度傳感器，用freertos建立了兩個個任務，

任務一讀取接收到的信息（因為這個工程中沒有移植cJSON，讀到的數據是cJSON格式，請自行解碼）

任務二不斷采集傳感器信息并發送到服務器（因為這個工程中沒有移植EDPkit，是用EdpPrototypeDebugger生成了一個定長數據，并進行替換）

/**

  ******************************************************************************

  * File Name          : freertos.c

  * Description        : Code for freertos applications

  ******************************************************************************

  * This notice applies to any and all portions of this file

  * that are not between comment pairs USER CODE BEGIN and

  * USER CODE END. Other portions of this file, whether 

  * inserted by the user or by software development tools

  * are owned by their respective copyright owners.

  *

  * Copyright (c) 2017 STMicroelectronics International N.V. 

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without 

  * modification, are permitted, provided that the following conditions are met:

  *

  * 1. Redistribution of source code must retain the above copyright notice, 

  *    this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright notice,

  *    this list of conditions and the following disclaimer in the documentation

  *    and/or other materials provided with the distribution.

  * 3. Neither the name of STMicroelectronics nor the names of other 

  *    contributors to this software may be used to endorse or promote products 

  *    derived from this software without specific written permission.

  * 4. This software, including modifications and/or derivative works of this 

  *    software, must execute solely and exclusively on microcontroller or

  *    microprocessor devices manufactured by or for STMicroelectronics.

  * 5. Redistribution and use of this software other than as permitted under 

  *    this license is void and will automatically terminate your rights under 

  *    this license. 

  *

  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 

  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 

  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 

  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY

  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 

  * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 

  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 

  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 

  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,

  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  *

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "FreeRTOS.h"

#include "task.h"

#include "cmsis_os.h"

/* USER CODE BEGIN Includes */     

#include "gpio.h"

//#include "OLED_I2C.h"

#include "usart.h"

#include "esp8266.h"

#include "adc.h"

/* USER CODE END Includes */

/* Variables -----------------------------------------------------------------*/

osThreadId defaultTaskHandle;

osThreadId SendTempHandle;

osMessageQId myQueue01Handle;

/* USER CODE BEGIN Variables */

extern uint8_t rxbuffer[];

uint8_t message[27]={0X80,0X19,0X80,0X00,0X08,0X32,0X33,0X37,0X37,0X36,0X31,0X34,0X37,0X05,

0X00,0X0B,0X2C,0X3B,0X74,0X65,0X6D,0X70,0X2C,0X31,0X32,0X33,0X34 }; //Data Format Form EDPDEBUGGER

/* USER CODE END Variables */

/* Function prototypes -------------------------------------------------------*/

void StartDefaultTask(void const * argument);

void Tempsend(void const * argument);

void MX_FREERTOS_Init(void); /* (MISRA C 2004 rule 8.1) */

/* USER CODE BEGIN FunctionPrototypes */

/* USER CODE END FunctionPrototypes */

/* Hook prototypes */

/* Init FreeRTOS */

void MX_FREERTOS_Init(void) {

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* USER CODE BEGIN RTOS_MUTEX */

  /* add mutexes, ... */

  /* USER CODE END RTOS_MUTEX */

  /* USER CODE BEGIN RTOS_SEMAPHORES */

  /* add semaphores, ... */

  /* USER CODE END RTOS_SEMAPHORES */

  /* USER CODE BEGIN RTOS_TIMERS */

  /* start timers, add new ones, ... */

  /* USER CODE END RTOS_TIMERS */

  /* Create the thread(s) */

  /* definition and creation of defaultTask */

  osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);

  defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);

  /* definition and creation of SendTemp */

  osThreadDef(SendTemp, Tempsend, osPriorityNormal, 0, 128);

  SendTempHandle = osThreadCreate(osThread(SendTemp), NULL);

  /* USER CODE BEGIN RTOS_THREADS */

  /* add threads, ... */

  /* USER CODE END RTOS_THREADS */

  /* Create the queue(s) */

  /* definition and creation of myQueue01 */

  osMessageQDef(myQueue01, 16, uint8_t);

  myQueue01Handle = osMessageCreate(osMessageQ(myQueue01), NULL);

  /* USER CODE BEGIN RTOS_QUEUES */

  /* add queues, ... */

  /* USER CODE END RTOS_QUEUES */

}

/* StartDefaultTask function */

void StartDefaultTask(void const * argument)

{

  /* USER CODE BEGIN StartDefaultTask */

  /* Infinite loop */

  for(;;)

  {

    osDelay(100);

HAL_UART_Receive(&huart1,rxbuffer,200,1000);

OLED_ShowStr(0,0,rxbuffer,2);

memset(rxbuffer,0,sizeof(uint8_t)*200);

// OLED_CLS();

  }

  /* USER CODE END StartDefaultTask */

}

/* Tempsend function */

void Tempsend(void const * argument)