DHT11
เป็นโมดูลใช้ในการวัดอุณหภูมิ และความชื้น
รูป DHT11
โปรแกรม สามารถเลือกใช้ได้ทั้ง DHT11 DHT22
ขอบคุณบทความ
#include "DHT.h"
#define DHTPIN 2 // what digital pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
DHT *dht;
void setup()
{
Serial.begin(115200);
Serial.println("DHT11 test!");
initDht(&dht, DHTPIN, DHTTYPE);
}
void loop()
{
readDht();
delay(2000);
}
void initDht(DHT **dht, uint8_t pin, uint8_t dht_type) {
*dht = new DHT(pin, dht_type, 30);
(*dht)->begin();
Serial.println("DHTxx Begin");
}
void readDht()
{
float h = dht->readHumidity();
float t = dht->readTemperature();
float f = dht->readTemperature(true);
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
float hif = dht->computeHeatIndex(f, h);
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");
}
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