#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <SimpleDHT.h>
#include <Servo.h> 

Servo myservo;  //创建一个舵机控制对象
int pos = 0;    // 该变量用与存储舵机角度位置
int pinDHT11 = 5;
int pinDELAY = 4;
int pinLED = 2;
int pinBEEP = 15;
int pinSTEERING = 16;

SimpleDHT11 dht11(pinDHT11);


// Update these with values suitable for your network.
//只需要修改wifi名称和密码
const char* ssid = "61";
const char* password = "6161612333";

const char* mqtt_server = "k0fed7ae.cn.emqx.cloud";//服务器地址
const char *mqtt_username = "WX_esp8266";
const char *mqtt_password = "123456";

WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
int led_status = 0;
int delay_status = 0;

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  Serial.print((char)payload[0]);
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == '1') {
    digitalWrite(pinLED, LOW);   
   
  }
  if ((char)payload[0] == '2'){
    digitalWrite(pinLED, HIGH);  
  }
  if ((char)payload[0] == '3') {
    digitalWrite(pinDELAY, HIGH);   
   
  }
  if ((char)payload[0] == '4'){
    digitalWrite(pinDELAY, LOW);  
  }

}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str(), mqtt_username, mqtt_password)) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish("outTopic", "hello world");
      // ... and resubscribe
      client.subscribe("inTopic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void beepStart (){
    digitalWrite(pinBEEP, LOW); 
  }

  
void beepStop (){
    digitalWrite(pinBEEP, HIGH); 
  }

void shunshizhen(){
  
    myservo.write(0);        // 指定舵机转向的角度
    delay(15);               // 等待15ms让舵机到达指定位置

};

void nishizhen(){
  
    myservo.write(180);         // 指定舵机转向的角度 
    delay(15);                        // 等待15ms让舵机到达指定位置 
 
 };

void setup() {
  pinMode(pinLED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(pinDELAY, OUTPUT);
  pinMode(pinBEEP, OUTPUT);
  myservo.attach(16);  // 该舵机由arduino第16脚控制
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 12589);//服务器端口号
  client.setCallback(callback);
  reconnect();
  while(!client.subscribe("wx_android",0))
  {Serial.println("订阅失败;尝试重新订阅！");
   client.subscribe("wx_android",0);
   delay(300);
   }
   Serial.println("订阅成功~~~");

   shunshizhen();
}

void loop() {
  // 默认关闭蜂鸣器
  beepStop();
  //delay(1000);
  
  if (!client.connected()) {
    reconnect();
  }
   
  client.loop();

  long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    Serial.begin(115200);

    while(!client.subscribe("wx_android",0))
    {Serial.println("订阅失败;尝试重新订阅！");
    client.subscribe("wx_android",0);
    delay(300);
    }
    Serial.println("订阅成功~~~");
    byte temperature = 0;
    byte humidity = 0;
    int err = SimpleDHTErrSuccess;
    if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
        Serial.print("Read DHT11 failed, err="); Serial.println(err);delay(1000);
        return;
    }
  
    Serial.print((int)temperature); 
    Serial.print(" *C, "); 
    Serial.print((int)humidity); 
    Serial.println(" H");

    if(temperature > 30){
        nishizhen();
      
        beepStart();
        delay(1000);
        beepStop();
      }else{
        shunshizhen();
        delay(1000);
        }

    if(digitalRead(pinLED) == HIGH){
      led_status = 0;
    }else{
      led_status = 1;
    }

    if(digitalRead(pinDELAY) == HIGH){
      delay_status = 1;
    }else{
      delay_status = 0;
    }    
    Serial.print("LED, "); 
    Serial.println((int)led_status); 
    Serial.print("DELAY,");
    Serial.println((int)delay_status); 


    
    snprintf (msg, 50, "%ld", (int)temperature);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("wx_tem_sensor", msg);              //发布信息

    snprintf (msg, 50, "%ld", (int)humidity);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("wx_hum_sensor", msg);              //发布信息

    snprintf (msg, 50, "%ld", (int)led_status);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("wx_led_sensor", msg);              //发布信息

    snprintf (msg, 50, "%ld", (int)delay_status);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("wx_delay_sensor", msg);              //发布信息
  }
}