Περιγραφή
Με τον αισθητήρα DHT11 μετράμε την υγρασία και την θερμοκρασία της ατμόσφαιρας και τυπώνουμε τις τιμές σε οθόνη LCD I2C.
Εξαρτήματα και συνδέσεις
- Arduino Uno
- αισθητήρας DHT11
- οθόνη LCD I2C
Κώδικας
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "DHT.h"
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
#define DHTPIN 2
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println(F("DHTxx test!"));
dht.begin();
lcd.init();
lcd.clear();
lcd.backlight();
}
void loop() {
float h = dht.readHumidity();
float t = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
Serial.print(F("HUMI: "));
Serial.print(h);
Serial.println(F("%"));
Serial.print(F("TEMP: "));
Serial.print(t);
Serial.println(F("°C "));
lcd.setCursor(0,0);
lcd.print(F("TEMP: "));
lcd.print(t);
lcd.print(F(" oC"));
lcd.setCursor(0,1);
lcd.print(F("HUMI: "));
lcd.print(h);
lcd.print(F(" %"));
}
