【智能开关】制作教程

淩亂°似流年 2022-12-26 15:30 108阅读 0赞

# 智能开关 #

演示视频：[https://www.bilibili.com/video/BV1qz4y1k7xS/][https_www.bilibili.com_video_BV1qz4y1k7xS]

![图像][35715b6967a23a7e3f61d389340b9a1b.png]

![Screenshot\_2020-12-02-12-39-30-190\_com.example.do][Screenshot_2020-12-02-12-39-30-190_com.example.do]

## 资料 ##

完整教学视频：

*  第一期：[https://www.bilibili.com/video/BV1Ma4y1W7jh/][https_www.bilibili.com_video_BV1Ma4y1W7jh]
 *  第二期：[https://www.bilibili.com/video/BV1ZK41137YH/][https_www.bilibili.com_video_BV1ZK41137YH]
 *  第三期：

## 结构 ##

**硬件部分 服务器 安卓APP**

> 通信协议：MQTT

## 清单 ##

**NodeMCU**：ESP8266串口wifi模块 NodeMCU Lua V3物联网开发板 CH340 CP2102(淘宝搜索)  
**舵机**：180度  
**电源模块**：提供5v,3.3v输出  
**dht11**温湿度传感器  
**杜邦线** ：公对公 公对母 母对母

> esp8266库：`https://arduino.esp8266.com/stable/package_esp8266com_index.json`

## 开发工具 ##

*  Arduino IDE
 *  EMQ X
 *  AndroidStudio

## nodeMCU代码 ##

> GitHub:[https://github.com/Asimok/unoproject\_backup/tree/master/dorm\_light/dorm\_light\_temp\_8266][https_github.com_Asimok_unoproject_backup_tree_master_dorm_light_dorm_light_temp_8266]

/* 智能开关nodemcu代码 D0 舵机左 D1 舵机右 D2 dht11 */
    /*arduino安装自带*/
    #include<Servo.h>
    #include <SoftwareSerial.h>
    /*自行安装*/
    #include <ESP8266WiFi.h>
    #include <PubSubClient.h>
    /*引入本地头文件*/
    #include "dht11.h"
    #include "ArduinoJson-v6.15.2.h"
    #define dht11Pin D2 //定义温湿度针脚号为D2号引脚
    /*实例化对象*/
    dht11 dht;
    Servo left_servo, right_servo;
    
    /**MQTT服务器参数配置*/
    const char* wifiSSID = "wifi名称";
    const char* password = "密码";
    const char* mqttServer = "IP";
    const int mqttPort = 1883;
    const char* clientId = "设备id";
    const char* topic = "订阅主题";
    
    WiFiClient espClient;
    PubSubClient client(espClient);
    
    /*开关状态*/
    bool leftStatue = false;
    bool rightStatue = false;
    
    void setup() { 
      delay(1000);
      switchlight("closeLeft");
      delay(500);
      switchlight("closeRight");
      delay(1000);
    
      Serial.begin(9600);
      /*连接wifi*/
      WiFi.begin(wifiSSID, password);
      while (WiFi.status() != WL_CONNECTED) { 
        delay(500);
        // Serial.println("Connecting to WiFi..");
      }
      Serial.println("Connected to the WiFi network");
      /*连接MQTT服务器*/
      client.setServer(mqttServer, mqttPort);
      client.setCallback(callback);
      while (!client.connected()) { 
        Serial.println("Connecting to MQTT...");
        if (client.connect(clientId)) { 
          Serial.println("MQTT connected");
        } else { 
          Serial.print("failed with state ");
          Serial.print(client.state());
          delay(2000);
        }
      }
    
      pinMode(dht11Pin, OUTPUT);
      
      char buff[50];
      memset(buff, 0, sizeof(buff));
      strcpy(buff, clientId);
      const char *buff2 = " 上线";
      strcat(buff, buff2);
      
      //发送连接成功消息
      client.publish(topic, buff );
      //订阅主题
      client.subscribe(topic);
      delay(100);
      // 初始化开关状态
      switchlight("closeLeft");
      delay(1000);
      switchlight("closeRight");
    }
    void get_dht11()
    { 
    
      char msg[500];
      int tol = dht.read(dht11Pin);    //将读取到的值赋给tol
      int temp = (float)dht.temperature; //将温度值赋值给temp
      int humi = (float)dht.humidity; //将湿度值赋给humi
      
      delay(10);      //延时1秒
      StaticJsonDocument<200> temperature_data;
      temperature_data["sensor"] = "DHT11";
      temperature_data["temp"] = temp;
      temperature_data["humi"] = humi;
      serializeJson(temperature_data, msg);
      //Serial.println(msg);
      client.publish(topic, msg);
    }
    /** 断开重连 */
    void reconnect_mqtt() { 
      while (!client.connected()) { 
        Serial.println("reConnecting to MQTT...");
        if (client.connect(clientId)) { 
          Serial.println("connected");
        } else { 
          Serial.print("failed with state ");
          Serial.print(client.state());
          delay(2000);
        }
      }
    }
    void reconnect_wifi()
    { 
      while (WiFi.status() != WL_CONNECTED) { 
        delay(500);
        Serial.println("Connecting to WiFi..");
      }
      Serial.println("reConnected to the WiFi network");
    }
    
    void callback(char* topic, byte* payload, unsigned int length) { 
      //收到消息
      Serial.print("Message:");
      char a[2000] = "";
      for (int i = 0; i < length; i++) { 
        Serial.print((char)payload[i]);
        a[i] = (char)payload[i];
      }
    
      docode(a);
    }
    void docode(char json[2000])
    { 
      // 解析指令
      // {"code":"openLeft"}
      StaticJsonDocument<200> doc;
      deserializeJson(doc, json);
      const char* code = doc["code"];
      Serial.println();
      Serial.println(code);
      String tempcode;
      tempcode = String(code);
      if (tempcode == "get_dht11")
        get_dht11();
      else if (tempcode == "get_light_status")
        send_light_data();
      else
        switchlight(tempcode);
    }
    
    void switchlight(String tempcode)
    { 
    
      delay(50);
      if (tempcode == "openLeft")
      { 
        left_servo.attach(D0);
        left_servo.write(82);
        delay(300);
        left_servo.write(45);
        delay(100);
        left_servo.detach();
        leftStatue = true;
        send_light_data();
      }
      else if (tempcode == "openRight")
      { 
        right_servo.attach(D1);
        right_servo.write(8);
        delay(300);
        right_servo.write(65);
        delay(100);
        right_servo.detach();
        rightStatue = true;
        send_light_data();
      }
      else if (tempcode == "closeLeft")
      { 
        left_servo.attach(D0);
        left_servo.write(2);
        delay(300);
        left_servo.write(45);
        delay(100);
        left_servo.detach();
        leftStatue = false;
        send_light_data();
    
      }
      else if (tempcode == "closeRight")
      { 
        right_servo.attach(D1);
        right_servo.write(130);
        delay(300);
        right_servo.write(65);
        delay(100);
        right_servo.detach();
        rightStatue = false;
        send_light_data();
      }
    }
    
    void send_light_data() { 
      delay(10);
      char msg[500];
      StaticJsonDocument<200> light_data;
      light_data["sensor"] = "servo";
      light_data["left"] = leftStatue;
      light_data["right"] = rightStatue;
      serializeJson(light_data, msg);
      // Serial.println(msg);
      
      client.publish(topic, msg );
      delay(100);
    }
    void loop() { 
      //重连机制
      if (!client.connected()) { 
        reconnect_mqtt();
      }
      if (WiFi.status() != WL_CONNECTED)
      { 
        reconnect_wifi();
      }
      client.loop();
    }

[https_www.bilibili.com_video_BV1qz4y1k7xS]: https://www.bilibili.com/video/BV1qz4y1k7xS/
[35715b6967a23a7e3f61d389340b9a1b.png]: /images/20221120/801c438c10dd4ca19a3947612618afdd.png
[Screenshot_2020-12-02-12-39-30-190_com.example.do]: /images/20221120/d3f45156dd8a4dc395733d3b197a7162.png
[https_www.bilibili.com_video_BV1Ma4y1W7jh]: https://www.bilibili.com/video/BV1Ma4y1W7jh/
[https_www.bilibili.com_video_BV1ZK41137YH]: https://www.bilibili.com/video/BV1ZK41137YH/
[https_github.com_Asimok_unoproject_backup_tree_master_dorm_light_dorm_light_temp_8266]: https://github.com/Asimok/unoproject_backup/tree/master/dorm_light/dorm_light_temp_8266