วงจรวัดอุณหภูมิและความชื้น

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include <DHT.h>

#define DHTPIN 2     // Digital pin connected to the DHT sensor

// Uncomment whatever type you're using!

#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);

// I2C Address of the LCD

const int LCD_ADDR = 0x27;

// LCD dimensions

const int LCD_COLS = 16;

const int LCD_ROWS = 2;

// Initialize LCD

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLS, LCD_ROWS);

void setup() {

  Serial.begin(9600);

  Serial.println(F("DHTxx test!"));

  dht.begin();

  // Initialize LCD

  lcd.begin(LCD_COLS, LCD_ROWS);

  lcd.backlight();

}

void loop() {

  delay(2000);

  float h = dht.readHumidity();

  float t = dht.readTemperature();

  float f = dht.readTemperature(true);

  if (isnan(h) || isnan(t) || isnan(f)) {

    Serial.println(F("Failed to read from DHT sensor!"));

    return;

  }

  float hif = dht.computeHeatIndex(f, h);

  float hic = dht.computeHeatIndex(t, h, false);

  // Clear the LCD screen

  lcd.clear();

  // Display Humidity

  lcd.setCursor(0, 0);

  lcd.print(F("Humidity: "));

  lcd.print(h);

  lcd.print(F("%"));

  // Display Temperature

  lcd.setCursor(0, 1);

  lcd.print(F("Temp: "));

  lcd.print(t);

  lcd.print(F("C / "));

  lcd.print(f);

  lcd.print(F("F"));

  delay(5000);  // Display for 5 seconds

}

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include <DHT.h>

#define DHTPIN 2 // Pin where DHT11 is connected

#define DHTTYPE DHT11 // DHT11 sensor

DHT dht (DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd (0x3F, 20, 4); // Set the LCD address to 0x3F for a 1602 display

void setup() {

lcd.begin(); // Initialize the LCD

lcd.backlight(); // Turn on the backlight

dht.begin(); // Initialize the DHT sensor

Serial.begin(9600); // Initialize serial communication

}

void loop() {

float temperature = dht.readTemperature();// Read temperature from DHT sensor

float humidity = dht.readHumidity(); // Read humidity from DHT sensor 

lcd.setCursor(0,0); // Set cursor to first line 

lcd.print ("Hi,Wittayakorn"); // Print message to LCD 

lcd.setCursor(0,1); // Set cursor to second line 

lcd.print ("T: "); // Print label for temperature

lcd.print (temperature); // Print temperature value 

lcd.print (" C H: "); // Print label for humidity 

lcd.print (humidity); // Print humidity value

lcd.print ("%");// Print unit for humidity

delay(2000); // Wait 2 seconds before reading sensor again

}