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May 9, 2018 09:26
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// Example testing sketch for various DHT humidity/temperature sensors | |
// Written by ladyada, public domain | |
#include "DHT.h" | |
#define DHTPIN 2 // what digital pin we're connected to | |
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321 | |
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"); | |
} | |
//ที่มา https://github.com/adafruit/DHT-sensor-libraryhttps://github.com/adafruit/DHT-sensor-library |
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