// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2019-11-12 오전 3:55:07
// by Ok-Hyun Park
//
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT11.h>
//
LiquidCrystal_I2C lcd(0x27,16,2);
//
int pin=7;
DHT11 dht11(pin);
//
int relay1=8,relay2=9,relay3=10,relay4=11;
//
int   err=0;
float temp,humi;
long  t,t1,t2;
//
void setup(){
  pinMode(relay1,OUTPUT); //워터펌프
  pinMode(relay2,OUTPUT); //팬
  pinMode(relay3,OUTPUT); //히트블럭
  pinMode(relay4,OUTPUT); //LED
  lcd.init(); lcd.backlight();
  Serial.begin(9600);
  t=t1=t2=millis();
}
//
void loop(){
  t=millis();
  if((t-t1)>=1000){ t1=t; // 1초마다 센서 읽기
    lcd.clear();
    if((err=dht11.read(humi,temp))==0){
      lcd.setCursor(0,0); lcd.print("Temp: "); lcd.print(temp);
      lcd.setCursor(0,1); lcd.print("Humi: "); lcd.print(humi);
      //
      Serial.print("temp: "); Serial.print(temp);
      Serial.print("humi: "); Serial.println(humi);
      //
      if(temp<=22){
        digitalWrite(relay2,LOW); //팬 ON
        digitalWrite(relay3,LOW); //히트블럭 ON
      }
      else{
        digitalWrite(relay2,HIGH); //팬 OFF
        digitalWrite(relay3,HIGH); //히트블럭 OFF
      }
      digitalWrite(relay1,LOW); //워터펌프 ON
    }
    else{
      err++;
      lcd.setCursor(0,0); lcd.print("ERROR NO.: "); lcd.print(err);
      //
      Serial.print("ERROR NO.: "); Serial.println(err);
    }
  }
  //
  if     ((t-t2)<57600000){ digitalWrite(relay4,LOW ); } // 16시간보다 작으면 LED ON
  else if((t-t2)<86400000){ digitalWrite(relay4,HIGH); } // 24시간보다 작으면 LED OFF
  else                    { t2=t; }
}