// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2019-05-12 오후 10:53:57
// by Ok-Hyun Park
#include <SoftwareSerial.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN  2 // 습도센서 Signal 선 연결
#define DHTTYPE DHT22 // 습도센서 종류: DHT22
DHT dht(DHTPIN,DHTTYPE);
LiquidCrystal_I2C lcd(0x3F,16,2); // LCD주소: 0x27 또는 0x3F
//
int analog=analogRead(A1);
int relay1=10; // relay에 10번핀 설정
int relay2=9;
int motorPin=6;
int R=3;
float hum,temp;
SoftwareSerial bluetooth(8,9);
int fan=0;
//
void setup(){
  Serial.begin(9600);
  bluetooth.begin(9600);
  dht.begin();
  lcd.init(); lcd.backlight(); lcd.clear();
  pinMode(relay1,OUTPUT); // relay를 output으로 설정
  pinMode(relay2,OUTPUT);
  pinMode(motorPin,OUTPUT);
  pinMode(R,OUTPUT);
  Serial.begin(9600);
  while(!Serial);
  Serial.println("Speed 0 to 255");
}
//
void loop(){
  int analog=analogRead(A1);
  int speed=Serial.parseInt();
  //
  if(Serial.available()){
    if(speed>=0&&speed<=255){ analogWrite(motorPin,speed); }
  }
  //
  delay(2000);
  hum=dht.readHumidity();
  temp=dht.readTemperature();
  Serial.print("HUMIDITY: ");    Serial.print(hum,0); Serial.print("%,");
  Serial.print("SOIL: ");        Serial.print(analog);
  Serial.print("TEMPERATURE: "); Serial.print(temp,0); Serial.println(" C");
  lcd.setCursor(0,0);
  lcd.print("TEM: ");     lcd.print(temp,0);
  lcd.print("C  SOIL: "); lcd.print(analog);
  lcd.setCursor(0,1);     lcd.print("HUM: "); lcd.print(hum,0);
  lcd.print("%FAN: ");    lcd.print(fan);
  //
  if     (temp>27){ digitalWrite(relay1,HIGH); digitalWrite(relay2,LOW); } //relay OFF
  else if(temp<26){ digitalWrite(relay1,LOW); digitalWrite(relay2,HIGH); } // relay ON  
  else{ digitalWrite(relay2,LOW); digitalWrite(relay1,LOW); }
  //
  if     (analog>350){ digitalWrite(R,LOW); } //relay OFF
  else if(analog<350){ digitalWrite(R,HIGH); } // relay ON
  //
  if(bluetooth.available()){
    char val=bluetooth.read(); Serial.write(val);
    if(val=='a'){ fan=2; analogWrite(6,0); }
    if(val=='b'){ fan=1; analogWrite(6,130); }
    if(val=='c'){ fan=0; analogWrite(6,255); }
  }
}