DHT22

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Eksempel:

#include <SimpleDHT.h>

// for DHT22, VCC: 5V or 3V, GND: GND, DATA: 2
int pinDHT22 = 2;
SimpleDHT22 dht22(pinDHT22);

void setup() {
Serial.begin(115200);
}

void loop() {
// start working...
Serial.println("=================================");
Serial.println("Sample DHT22...");

// read without samples.
// @remark We use read2 to get a float data, such as 10.1*C
// if user doesn't care about the accurate data, use read to get a byte data, such as 10*C.
float temperature = 0;
float humidity = 0;
int err = SimpleDHTErrSuccess;
if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
Serial.print("Read DHT22 failed, err="); Serial.println(err);delay(2000);
return;
}

Serial.print("Sample OK: ");
Serial.print((float)temperature); Serial.print(" *C, ");
Serial.print((float)humidity); Serial.println(" RH%");

// DHT22 sampling rate is 0.5HZ.
delay(2500);
}