🌡️ ماموریت ۷۸: ایستگاه هوا: دما و رطوبت

سیم‌کشی

1. Arduino Uno (VCC5) ⟷ dht-sensor (VCC)
2. Arduino Uno (D2) ⟷ dht-sensor (DATA)
3. dht-sensor (GND) ⟷ Arduino Uno (GND2)
4. Arduino Uno (VCC5) ⟷ LCD 16×2 I2C (VCC)
5. LCD 16×2 I2C (GND) ⟷ Arduino Uno (GND1)
6. Arduino Uno (A4) ⟷ LCD 16×2 I2C (SDA)
7. Arduino Uno (A5) ⟷ LCD 16×2 I2C (SCL)

کد

// Temperature + humidity from a DHT22 on an I2C LCD
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

DHT dht(2, DHT22);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  dht.begin();
  lcd.init();
  lcd.backlight();
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t, 1);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Hum:  ");
  lcd.print(h, 0);
  lcd.print(" %");
  delay(2000);          // a DHT22 needs about 2 s between readings
}