#include <DHT22.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);
//define pin data
#define pinDATA 21 // SDA, or almost any other I/O pin

DHT22 dht22(15); 
 
void setup() {
lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  Serial.begin(115200); //1bit=10µs
  Serial.println("\ntest capteur DTH22");


}

void loop() {
  Serial.println(dht22.debug()); //optionnal

  float t = dht22.getTemperature();
  float h = dht22.getHumidity();

  if (dht22.getLastError() != dht22.OK) {
    Serial.print("last error :");
    Serial.println(dht22.getLastError());
  }

  Serial.print("h=");Serial.print(h,1);Serial.print("\t");
  Serial.print("t=");Serial.println(t,1);
  delay(2000); //Collecting period should be : >1.7 second
  lcd. setCursor (0,0) ;
lcd. print ("Temp=");
lcd. setCursor (5,0);
lcd. print(t);
lcd. setCursor (0,1);
lcd. print ("Humidity=");
lcd. setCursor (9,1) ;
lcd. print(h);
}