#include <LiquidCrystal_PCF8574.h>
#include <DHT.h>
LiquidCrystal_PCF8574 lcd(0x27);
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN,DHTTYPE);
char grados = 223;
void setup() {
dht.begin();
lcd.begin(20, 4);
delay(200);
lcd.setBacklight(255);
lcd.print("Humedad:");
lcd.setCursor(0,1);
lcd.print("Temperatura:");
}
void loop() {
float h = dht.readHumidity();
float t = dht.readTemperature();
if(isnan(h) || isnan(t))
{
lcd.setCursor(13,0);
lcd.print("error!");
lcd.setCursor(13,1);
lcd.print("error!");
return;
}
lcd.setCursor(13,0);
lcd.print(h,0);
lcd.print("% ");
lcd.setCursor(13,1);
lcd.print(t,0);
lcd.print((char)grados);
lcd.print("C ");
}