中国移动onenet平台


前言

最近在弄onenet平台,用arduino结合esp8266,就是不知道怎么回事,一直连不上wifi,然后就用esp8266试了一下,没想到一下就在线了,先看一下图。
ESP8266通过MQTT协议连接onenet云平台-LMLPHP

一、onenet平台

ESP8266通过MQTT协议连接onenet云平台-LMLPHP
你就创建一个mqtt协议接入的设备就行了

二、ESP8266

怎么配置环境的就不讲了,直接附上源码,这个代码可以直接连

1.完整代码

const char *Device_ID = "";         //设备ID
const char *Product_ID = "";        //产品ID
const char *Api_KEY = "MQ";           //鉴权信息
const char *WiFi_SSID = "QCX";         //WiFi名称
const char *WiFi_Password = "88888888"; //WiFi密码
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
float Current = 0;
uint8_t Upload_Package[100];
uint32_t Last_Updata_Time = 0;
WiFiClient espClient;
PubSubClient client(espClient);
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()
{
  Serial.begin(115200);
  WiFi_Init();
  MQTT_Init();
}
 
void loop()
{
  if (!client.connected())
    MQTT_Reconnection();
  if (millis() - Last_Updata_Time >= 3000)
  {
    Last_Updata_Time = millis();
    float ADC_Value = analogRead(A0);
    Current = (ADC_Value - 512) * 0.033783784;
    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];
    client.publish("$dp", Upload_Package, Json_Buffer.length() + 3);
  }
  client.loop();
}
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(".");
  }
  Serial.print("\r\nWiFi Connected.\r\nIP address: ");
  Serial.println(WiFi.localIP());
}
 
void MQTT_Init(void)
{
  client.setServer("183.230.40.39", 6002);
  client.setCallback(MQTT_Callback);
}
void MQTT_Callback(char *MQTT_Topic, uint8_t *MQTT_Payload, uint16_t MQTT_Payload_Len)
{
  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 Connected");
    else
    {
      Serial.print("Connect Failed, Error Code = ");
      Serial.print(client.state());
      Serial.println(", Try again in 5 seconds.");
      delay(5000);
    }
  }
}

将A0口读取的模拟值上传到onenet,将接收到onenet下发信息时在串口打印
ESP8266通过MQTT协议连接onenet云平台-LMLPHP

2.联网代码

下面是联网的代码,固件下载AT 4M固件

//首先要有WiFi参数
const char *WiFi_SSID = "*******";         //WiFi名称
const char *WiFi_Password = "***********"; //WiFi密码
//其次要有WiFi驱动库
#include <ESP8266WiFi.h>
//声明下函数
void WiFi_Init(void);
void setup()//setup只执行一次,联网放这里面就行
{
  //串口要初始化下,方便查看过程
  Serial.begin(115200);
  //开始WiFi初始化
  WiFi_Init();
}
void loop()
{
 
}
void WiFi_Init(void)
{
  //打印下提示语
  Serial.print("\r\n\r\nConnecting to ");
  Serial.print(WiFi_SSID);
  //STA模式,传入wifi参数
  WiFi.mode(WIFI_STA);
  WiFi.begin(WiFi_SSID, WiFi_Password);
  Serial.print("\r\nWiFi Connected.\r\nIP address: ");
  Serial.println(WiFi.localIP());
}

3.连云代码

这个代码是连接onenet平台的

//首先要有参数
const char *Device_ID = "";       //设备ID
const char *Product_ID = "";         //产品ID
const char *Api_KEY = "";          //鉴权信息
//提供socket协议(MQTT基于TCP)
#include <ESP8266WiFi.h>
//提供MQTT协议
#include <PubSubClient.h>
//创建对象
WiFiClient espClient;
PubSubClient client(espClient);
//声明下函数
void MQTT_Init(void);
void MQTT_Reconnection(void);
void setup()
{
  Serial.begin(115200);
  MQTT_Init();//初始化MQTT
}
 
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();
  //MQTT运行
  client.loop();
}
void MQTT_Init(void)
{
  client.setServer("183.230.40.39", 6002);//设置服务器IP地址和端口
  client.setCallback(MQTT_Callback);      //设置接收到信息的回调函数
}
 
//MQTT重连函数
void MQTT_Reconnection(void)
{
  while (!client.connected())//循环到MQTT已连接
  {
    Serial.println("MQTT Reconnection.");
    if (client.connect(Device_ID, Product_ID, Api_KEY))//调用MQTT连接,传入对应的参数,返回1则连接成功
      Serial.println("MQTT Connected");
    else//否则就打印错误消息
    {
      Serial.print("Connect Failed, Error Code = ");
      Serial.print(client.state());
      Serial.println(", Try again in 5 seconds.");
      delay(5000);
    }
  }
}

4.数据处理


//在初始化MQTT时候,我们已经设置了回调函数
  client.setCallback(MQTT_Callback);
//所以,当收到信息时,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();
}
//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);

Upload_Package[0]为上传格式,可以参照ONENET文档,此处用的是5
数据示例:,;数据名称,数据值;
Upload_Package[1] * 256 + Upload_Package[2] 为 3~数据结束的长度

总结

ONENET的上传数据格式有点特殊,前3字节为固定格式,其后才是真正数据,所以我后面写了一个+3
ONENET的端口号是6002不是传统的1883
格式5即使是字符也不需要双引号(不同于JSON)

04-25 12:27