Arduino DHT11 sample program temperature and humidity sensor

1. First install SimpleDHT library
project - "Load Library -" Library Management - "Search SimpleDHT-" Click Install

2. Example program

#include <SimpleDHT.h>
int pinDHT11 = D4;  //温度传感器的输出引脚接到Arduino板子引脚上。此处用的是nodemcu的D4引脚
SimpleDHT11 dht11(pinDHT11);

void setup()
  {
    Serial.begin(9600);   //设置串口波特率为9600；
  }

void loop()
  {
 
    byte temperature = 0;
    byte humidity = 0;
    Serial.print("temperature: ");
    Serial.print((int)temperature);
    Serial.println(" *C ");
    Serial.print("humidity: ");
    Serial.print((int)humidity);
    Serial.println(" H ");
    delay(1500);
  }