#include <DHT22.h>
//define pin data
#define pinDATA SDA // SDA, or almost any other I/O pin
#define led 3

DHT22 dht22(pinDATA); 
 
void setup() {
  Serial.begin(115200); //1bit=10µs
  Serial.println("\ntest capteur DTH22");
  pinMode(led, OUTPUT);
}

void loop() {
  //optionnal

  float temp = dht22.getTemperature();
  float humi = dht22.getHumidity();

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

  if (temp > 25){
    digitalWrite(led, HIGH);
}
else{
  digitalWrite(led, LOW);
}
}