Arduino Với DHT11 Khống Chế Nhiệt Độ Độ Ẩm Bật Tắt Thiết Bị

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Thư viện

    DHT11:

#include <LiquidCrystal.h>
#include "DHT.h"
#include <EEPROM.h>

int tempT = 0, tempH = 20;
 
const int DHTPIN = 3;
const int DHTTYPE = DHT11;
const int Q1 = 12;
const int Q2 = 13;

const int pin_RS = 8;
const int pin_EN = 9;
const int pin_d4 = 4;
const int pin_d5 = 5;
const int pin_d6 = 6;
const int pin_d7 = 7;

byte degree[8] = {
  0B01110,
  0B01010,
  0B01110,
  0B00000,
  0B00000,
  0B00000,
  0B00000,
  0B00000
};

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal lcd(pin_RS, pin_EN, pin_d4, pin_d5, pin_d6, pin_d7);

int page = 0, value;
int cd = 0;


char checkKeyPad()
{
  int x;
  x = analogRead(0);
  if (x < 60)
  {
    return 'r';
  }
  else if (x < 200)
  {
    return 'u';
  }
  else if (x < 400)
  {
    return 'd';
  }
  else if (x < 600)
  {
    return 'l';
  }
  else if (x < 800)
  {
    return 's';
  }
}

void button()
{
  if (checkKeyPad() == 'l')
  {
    page --;
    if (page > 3) page = 0;
    if (page < 0) page = 3;
    lcd.clear();
    while (checkKeyPad() == 'l');
  }
  if (checkKeyPad() == 'r')
  {
    page ++;
    if (page > 3) page = 0;
    if (page < 0) page = 3;
    lcd.clear();
    while (checkKeyPad() == 'r');
  }
}

void setup() {
  lcd.createChar(1, degree);
  pinMode(Q1, OUTPUT);
  pinMode(Q2, OUTPUT);
  lcd.begin(16, 2);
  Serial.begin(9600);
  dht.begin();
  EEPROM.write(1, tempT);
  delay(5);
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  tempT = EEPROM.read(5);
  tempH = EEPROM.read(6);

  if (isnan(t) || isnan(h)) {
    Serial.println("DHT sensor error!");
    lcd.setCursor(0, 0);
    lcd.print("DHT sensor error!");
    lcd.setCursor(0, 1);
    lcd.print("                ");
    lcd.clear();
    return;
  }
  else {
     switch (page)
    {
      case 0:
        {
          lcd.setCursor(0, 0);
          lcd.print("    Thegioiic   ");
          lcd.setCursor(0, 1);
          lcd.print("<");
          lcd.setCursor(6, 1);
          lcd.print("DHT11");
          lcd.setCursor(15, 1);
          lcd.print(">");
          button();
          break;
        }
      case 1:
        {
          lcd.setCursor(0, 1);
          lcd.print("<");
          lcd.setCursor(15, 1);
          lcd.print(">");
          lcd.setCursor(2, 0);
          lcd.print(" T: ");
          lcd.print(t);
          lcd.write(1);
          lcd.print("C");

          lcd.setCursor(2, 1);
          lcd.print(" H: ");
          lcd.print(h);
          lcd.print(" %");
          button();
          delay(500);
          break;
        }
      case 2:
        {
          switch (cd)
          {
            case 0:
              {
                lcd.setCursor(0, 1);
                lcd.print("<");
                lcd.setCursor(15, 1);
                lcd.print(">");
                lcd.setCursor(5, 0);
                lcd.print("Set T,H");
                lcd.setCursor(1, 1);

                lcd.print("T = ");
                lcd.print(tempT);
                lcd.setCursor(9, 1);
                lcd.print("H = ");
                lcd.print(tempH);

                if (checkKeyPad() == 's')
                {
                  cd++;
                  if (cd > 2)cd = 0;
                  while (checkKeyPad() == 's');
                }
                button();
                break;
              }

            case 1:
              {
                setTemp();
                if (checkKeyPad() == 'u')
                {
                  tempT++;
                  if (tempT > 50)tempT = 0;
                  while (checkKeyPad() == 'u');
                }
                if (checkKeyPad() == 'd')
                {
                  tempT--;
                  if (tempT < 0)tempT = 50;
                  while (checkKeyPad() == 'd');
                }
                if (checkKeyPad() == 's')
                {
                  cd++;
                  if (cd > 2)cd = 0;
                  while (checkKeyPad() == 's');
                }
                EEPROM.write(5, tempT);
                delay(5);
                break;
              }
            case 2:
              {
                setHumi();
                if (checkKeyPad() == 'u')
                {
                  tempH++;
                  if (tempH > 95)tempH = 20;
                  while (checkKeyPad() == 'u');
                }

                if (checkKeyPad() == 'd')
                {
                  tempH--;
                  if (tempH < 20)tempH = 95;
                  while (checkKeyPad() == 'd');
                }
                if (checkKeyPad() == 's')
                {
                  cd++;
                  if (cd > 2)cd = 0;
                  while (checkKeyPad() == 's');
                }
                EEPROM.write(6, tempH);
                delay(5);
                break;
              }
          }
          break;
        }
      case 3:
        {
          lcd.setCursor(0, 0);
          lcd.print("T:");
          lcd.print(t);
          lcd.write(1);
          lcd.print("C");
          lcd.setCursor(0, 1);
          lcd.print("H:");
          lcd.print(h);
          lcd.print(" %");

          if (t > tempT) {
            lcd.setCursor(10, 0);
            lcd.print("Q1: CL");
            digitalWrite(Q1,LOW);
          } else {
            lcd.setCursor(10, 0);
            lcd.print("Q1: OP");
            digitalWrite(Q1,HIGH);
          }
          if (h > tempH) {
            lcd.setCursor(10, 1);
            lcd.print("Q2: CL");
            digitalWrite(Q2,LOW);
          } else {
            lcd.setCursor(10, 1);
            lcd.print("Q2: OP");
            digitalWrite(Q2,HIGH);
          }
          button();
          break;
        }
    }
  }
}

void setTemp()
{
  lcd.setCursor(5, 0);
  lcd.print("Set T,H");
  lcd.setCursor(1, 1);
  lcd.print("T = ");
  lcd.print(tempT);

  delay(150);

  lcd.setCursor(5, 1);
  lcd.print("  ");
  lcd.setCursor(9, 1);
  lcd.print("H = ");
  lcd.print(tempH);

  delay(150);
}


void setHumi()
{
  lcd.setCursor(5, 0);
  lcd.print("Set T,H");
  lcd.setCursor(9, 1);
  lcd.print("H = ");
  lcd.print(tempH);
  lcd.setCursor(1, 1);
  lcd.print("T = ");
  lcd.print(tempT);

  delay(150);

  lcd.setCursor(13, 1);
  lcd.print("  ");

  delay(150);
}

Video:

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