(ultra detailed onenet TCP protocol access) arduino+esp8266-01s access to the Internet of things platform, upload real-time data collection /tcp transparent transmission (and how to obtain and write L

Catalog

Preface

Experimental equipment

Experiment preparation （onenet）

Search china mobile onenet, Login after registration , Access control

  Add device information （lua Script add ）

test esp8266 modular （ Not connected to MCU ）

Access the MCU

The whole program

 onenet The platform outputs data in real time ​

  matters needing attention

---

Preface

        I have learned from the last article ds18b20 Simple use of temperature sensor （ How to write drivers for subsequent updates ） as well as lcd1602 Show , But considering some special application scenarios , For example, the collection point is too far away 、 Multipoint acquisition, etc , Labor is time-consuming and laborious , Need remote monitoring ？

At first I wanted to choose GPRS Module for transmission , A search found that even the monitoring applet has been done , You can use it （bushi）, But the price is a little expensive , Until I found out esp8266 modular , Choose here esp8266-01s（ Suggest ）, The price is low , Powerful , I don't say much nonsense , Let's start preparing .

Experimental equipment

esp8266-01s,USB to TTL modular （ There is the best , No, not much ）, There are several DuPont lines

DS18B20 Temperature sensor

arduino mega2560（ The same applies to other models ）

Experiment preparation （onenet）

Search china mobile onenet, Login after registration , Access control

Figure 1

  choice TCP transparent transmission （ I've added one item here before ） Click on the right to add products （ Feel free to fill in ）

Figure 2

  Figure 3

Figure 4

Add a device to the device list

 

  Figure 5

  Figure 6

Figure 7

Use luastudio Tool open ,lua The script statement is very long , In order to help novice developers, just introduce in detail device_data_analyze(dev) Function USES , Other details can be learned Developing documents

  More sentences , Properly understand the notes , It's useful later

Json

OneNET The basic message format of the system is designed as json Format , Its data can be mapped into virtual tables , In the data Key Corresponding to the column of the table ,Value Corresponding column value

You can convert a set of data represented into a string , Then you can easily pass this string between networks or programs , And restore it to the data format supported by each programming language when necessary , Easy to machine parse and generate , And effectively improve the network transmission efficiency

  Add device information （lua Script add ）

  Add custom code to the parsing function

function device_data_analyze(dev)
	local t={}
	local a=0

	--  Add user-defined code  --
	--  for example ： --
	local s = dev:size()
	add_val(t,"ds18b20_test",a,dev:bytes(1,s),"yqer123")
	dev:response()
	dev:send("received")                         

	-- return $1,$2 --
	--  for example ： --
	return s,to_json(t)
end

t--table Data point storage ,“ds18b20_test” Data stream name , There is no need to create... In the equipment ,a-- Time stamp , by 0 Indicates the current time

dev:bytes(1,s) Return the data ,1, Data starting point ,s Number of data bits , If not modified, the default data length is , When multiple devices are connected, they can be captured according to the acquisition bits of each device in the data packet

Then connect the device authentication information , Transfer to the device in the product

Save after modification , Upload lua To platform , After the serial port sends a message, the device is connected with lua Script Association

test esp8266 modular （ Not connected to MCU ）

Add an interrupt first , take it easy , Let's test esp8266 Whether the module is normal

esp826601s	USB to TTL
3V3	3V3
RX	TX
TX	RX
GND	GND

Table 1

Figure 8

Access computer , Open the serial port debugging assistant （ By the way, turn on the mobile hotspot settings wifi Name and password , Don't use Chinese , Try to be simple ）

  Figure nine

 AT+UART=9600,8,1,0,0

（ enter ）

Set up WiFi Application mode AT+CWMODE=3（1、station Pattern 2、AP Pattern 3、station+AP）

  At each step, pay attention to enter and then send

Figure ten

AT+CWJAP="HUAWEI nova3","12345678#%"

Figure eleven

Figure twelve

 AT+CIPSTART="TCP","183.230.40.40",1811

Fig13

There are so many pictures that they seem lengthy , Direct orders AT+CIPMODE=1（ Passthrough mode ）, return OK Later AT+CIPSEND（ To transmit data ）

  Here are two steps

Fig14

Communicate with server

Instructions   * product id（ Not a device id）# Device authentication information # Script name （ Not necessarily the script file name ）*

Fig15

  Get a response , Show online

Fig15

Access the MCU

arduinomega2560	esp826601s	DS18B20 Temperature sensor
TX	RX
RX	TX
7		DAT
GND	GND	GND
5V 3.3V( Be careful ）	3.3V	VCC

Table two

The whole program

#include <OneWire.h>       
#include <DallasTemperature.h>   //ds18b20 library 
#define Onewire_bus 7     //ds18b20 Connect 7 Pin 
OneWire oneWire(Onewire_bus);
DallasTemperature sensors(&oneWire);

//boolean  Successfully returns true, Failure to return false
boolean send_cmd(String data, char *keyword)
{
  boolean result = false;
  if (data != "")   // about tcp Connection command , Just wait for the second reply 
  {
    Serial.println(data);  // send out AT Instructions 
  }
  if (data == "AT")              // seek esp8266 Whether it works properly 
  delay(1000);
  else
    while (!Serial.available());              //  wait for wifi Module response 
    delay(200); 
  if (Serial.find(keyword))       // Return keyword judgment , such as ok
  {
    return true;
  }
  else
  {
     return false;
   }
  while (Serial.available()) Serial.read();      // Clear the serial buffer 
  delay(500); 
}


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  while (!send_cmd("AT", "OK"));
  while (!send_cmd("AT+CWMODE=3", "OK"));                                         // Working mode    
  while (!send_cmd("AT+CWJAP=\"HUAWEI nova3\",\"1234567#%$\"", "OK"));       // Access AP   
  while (!send_cmd("AT+CIPSTART=\"TCP\",\"183.230.40.40\",1811", "OK"));      // Access server 
  while (!send_cmd("AT+CIPMODE=1", "OK"));                                   // Passthrough mode 
  while (!send_cmd("AT+CIPSEND", ">"));                                          // Start sending 
  Serial.println("*514523#yqer123#test1*");                        // Send message information , product ID+ Equipment authentication code + Script name         
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(50);
//  Serial.print(" Get the temperature ：");    //  Send a few words 
  sensors.requestTemperatures();         // Get the temperature 
//  Serial.println(sensors.getTempCByIndex(0));
  float temp=sensors.getTempCByIndex(0);
  Serial.print(String(temp));
}

Serial port monitoring results , Slow response , The delay can be appropriately increased

 onenet The platform outputs data in real time

  matters needing attention

This test adopts hard serial port , Before burning the program , Single chip microcomputer TX,RX No access , Otherwise, you will not be able to upload

Try not to live wire

Add more pictures after , No sorting

Fill in the missing place

The figure is convenient. Only one device is connected in this experiment , Multi device scenarios are similar

//------------------------------------- Split line -------------------------------------------

The previous single equipment has been very detailed

The same goes for multiple devices , Only need lua Assign the data flow to the corresponding device in the （ Bind through device authentication information ） That's all right.

If you need me, I'll continue to do more

Add multiple devices , Set different authentication information and record it

open lua Script , Add device authentication information

 dev.bytes Select the starting point and number of digits

The device is online , Open data flow observation

  The intercepted segment has been sent to each device

 

  matters needing attention 2

The program segment only needs to bind the product id And the authentication information of one of the devices , Other devices are done in the script

Multi data output format

Serial.print(String(int(wd))+String(int(sd))+ String(float(deepcm))+String(int(TU_value))+String(int(tdsValue)))

The visualization operation will be updated later （ Application development seems to be castrated ） Or other MCU applications

Other access protocols are also welcome

Sorting is not easy to , Praise is my motivation to update