Arduino--基础（四）--weMos D1与DHT11一起使用

参考：https://www.cnx-software.com/2016/03/22/getting-started-with-wemos-d1-mini-esp8266-board-dht-relay-shields/

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电路连接原理图：

串口显示：

测试代码：

/* DHT Pro Shield - Simple * * Example testing sketch for various DHT humidity/temperature sensors * Written by ladyada, public domain * * Depends on Adafruit DHT Arduino library * https://github.com/adafruit/DHT-sensor-library */#include "DHT.h"#define DHTPIN D4     // what pin we're connected to// Uncomment whatever type you're using!#define DHTTYPE DHT11   // DHT 11//#define DHTTYPE DHT22   // DHT 22  (AM2302)//#define DHTTYPE DHT21   // DHT 21 (AM2301)// Connect pin 1 (on the left) of the sensor to +5V// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1// to 3.3V instead of 5V!// Connect pin 2 of the sensor to whatever your DHTPIN is// Connect pin 4 (on the right) of the sensor to GROUND// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor// Initialize DHT sensor.// Note that older versions of this library took an optional third parameter to// tweak the timings for faster processors.  This parameter is no longer needed// as the current DHT reading algorithm adjusts itself to work on faster procs.DHT dht(DHTPIN, DHTTYPE);void setup() {  Serial.begin(9600);  Serial.println("DHTxx test!");  dht.begin();}void loop() {  // Wait a few seconds between measurements.  delay(2000);  // Reading temperature or humidity takes about 250 milliseconds!  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)  float h = dht.readHumidity();  // Read temperature as Celsius (the default)  float t = dht.readTemperature();  // Read temperature as Fahrenheit (isFahrenheit = true)  float f = dht.readTemperature(true);  // Check if any reads failed and exit early (to try again).  if (isnan(h) || isnan(t) || isnan(f)) {    Serial.println("Failed to read from DHT sensor!");    return;  }  // Compute heat index in Fahrenheit (the default)  float hif = dht.computeHeatIndex(f, h);  // Compute heat index in Celsius (isFahreheit = false)  float hic = dht.computeHeatIndex(t, h, false);  Serial.print("Humidity: ");  Serial.print(h);  Serial.print(" %\t");  Serial.print("Temperature: ");  Serial.print(t);  Serial.print(" *C ");  Serial.print(f);  Serial.print(" *F\t");  Serial.print("Heat index: ");  Serial.print(hic);  Serial.print(" *C ");  Serial.print(hif);  Serial.println(" *F");}