/ FILE: dht_test.pde
// PURPOSE: DHT library test sketch for Arduino
//
//需要先建立librariesDHT文件夹中两个库文件
#include <dht.h>
dht DHT;
#define DHT11_PIN 4//put the sensor in the digital pin 4
void setup()
{
Serial.begin(9600);
Serial.println("DHT TEST PROGRAM ");
Serial.print("LIBRARY VERSION: ");
Serial.println(DHT_LIB_VERSION);
Serial.println();
Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)");
}
void loop()
{
// READ DATA
Serial.print("DHT11, \t");
int chk = DHT.read11(DHT11_PIN);
switch (chk)
{
case 0: Serial.print("OK,\t"); break;
case -1: Serial.print("Checksum error,\t"); break;
case -2: Serial.print("Time out error,\t"); break;
default: Serial.print("Unknown error,\t"); break;
}
// DISPLAT DATA
Serial.print(DHT.humidity,1);
Serial.print(",\t");
Serial.println(DHT.temperature,1);
delay(1000);
}
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