Here is the barest DHT11.ino in my collection.
---> do not forget a 10k pullup resistor
---> DHT on pin 8
good luck
// single DHT 11 temp-humidity sensor on Arduino with serial monitor reporting only
// original written by Tim Stephens 2013 - Temperature Logger | tjstephens
// public domain
// modified Floris Wouterlood July 1, 2017
// based on DHT11 examples by Ladyada.
// data pin of DHT11 sensors wired to pin 10 on Arduino
// 10k pull up resistor (between data and 5V)
#include "DHT.h"
float h, t;
DHT DHT_sens(8, DHT11); //datapin sensor to pin 10 Arduino
void setup()
{
DHT_sens.begin();
Serial.begin (9600);
Serial.println ("===============================================");
Serial.println ("Bare DHT11 temp-humidity sensor - June 30, 2017");
Serial.println ("===============================================");
Serial.println (" ");
}
void loop(){
// ================== read from buffer and display =========================
h = DHT_sens.readHumidity();
t = DHT_sens.readTemperature();
delay (1000); // pause a second
Serial.print ("Humidity: ");
Serial.print (h,0); // zero decimal
Serial.print (" %\t");
Serial.print ("Temperature: ");
Serial.print (t,1); // one decimal
Serial.println (" *C");
delay (1000); // pause a second
}