New Features

What feature(s) did you add?

• Before reading

  In China , Wechat is a communication tool developed by Tencent technology company.Almost all the people in China use Wechat App to communicate with others.Wechat is just like facebook or twitter.

  So I develop this project for promoting our life convenience,letting us not only use wechat to chat with our lovers and family ,but also use wechat to control our home appliance whenever and wherever we are .

• Briefly describe

  Previous , I wrote the function of controlling the MCU remotely through the Web UI.

  Now I add the additional way to remote control the MCU,which is controlling through a Wechat Application.

  

  

  ​

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How did you implement it/them?

1. Briefly introduce

• Add Wechat control server script.

  In this file,there are three parts

  • downup.php : connect the server with ESP8266
  • index.php : connect wechat official server with my server
  • switch.sql: Save the control variable into database

• Add ESP8266 firmware : ESP8266 connect to WIFI and HTTP request to server ,then get control variable

1. Show some of the new code

• index.php:

  if (strstr($content, "1ON")) {
          $con = mysql_connect(SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS); 
          $dati = date("h:i:sa");
          mysql_select_db("app_steemitcha0s0000", $con);//修改数据库名
   
          $sql ="UPDATE switch SET timestamp='$dati',state = '1'
          WHERE ID = '1'";//修改开关状态值
               if(!mysql_query($sql,$con))
               {
                die('Error: ' . mysql_error());
                 }else
               {
                  mysql_close($con);
                  $reply = "I am going to switch on the LED 1";
               }
          }
  

  According to the wechat server Communication protocol,we can get the data which the user send to the wechat application.

  Identify what the data is and then change the database data .

• downup.php

  <?php  if (($_GET['token'] == "weixin")) {
          $con = mysql_connect(SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,SAE_MYSQL_USER,SAE_MYSQL_PASS); 
          $data = $_GET['data'];
          mysql_select_db("app_steemitcha0s0000", $con);//要改成相应的数据库名
   
          $result = mysql_query("SELECT * FROM switch");
          while($arr = mysql_fetch_array($result)){//找到需要的数据的记录，并读出状态值
                  if ($arr['ID'] == 1) {
                          $state = $arr['state'];
                  }
          }
  
          mysql_close($con);
          echo "{".$state."}";//返回状态值，加“{”是为了帮助Arduino确定数据的位置
  }else{
          echo "Permission Denied";//请求中没有type或data或token或token错误时，显示Permission Denied
  }
   
  ?>
  

  Deal with the HTTP request from the ESP8266 and send back the control variable.

• ESP8266 firmware

   WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
    }
  

  Connect to WIFI and allow the ESP8266 to access the Internet

  if (client.connected())
    {
      digitalWrite(14, HIGH);
      client.print(String("POST ") + "/downup.php?token=weixin" + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" +
                 "User-Agent: BuildFailureDetectorESP8266\r\n" +
                 "Connection: close\r\n\r\n");
                 delay(90);
      String line = client.readStringUntil('{');
      Serial.print(line);
      delay(80);
      state = client.read();
      delay(100);
      }
  

  Send HTTP request to server and get the control variable from server

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Roadmap

Now , There are two ways to control the IOT smart hardware remotely.

In the future ,the control system will become more powerful

• Add sensors and LED states uploading to Web UI and show by chart
• Add a login system to become more practical
• Focusing more on UI design
• Connect to the Home appliance with using relay module

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How to contribute?

Github: https://github.com/Cha0s0000/IOT

• Fork it!
• Create your feature branch: git checkout -b my-new-feature
• Commit your changes: git commit -am 'Add some feature'
• Push to the branch: git push origin my-new-feature
• Submit a pull request.

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Posted on Utopian.io - Rewarding Open Source Contributors

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