// // FILE: dht_test.ino // AUTHOR: Rob Tillaart // VERSION: 0.1.07 // PURPOSE: DHT Temperature & Humidity Sensor library for Arduino // URL: http://arduino.cc/playground/Main/DHTLib // // Released to the public domain // #include dht DHT; #define DHT11_PIN 4 #define DHT21_PIN 5 #define DHT22_PIN 6 void setup() { Serial.begin(115200); 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("DHT22, \t"); int chk = DHT.read22(DHT22_PIN); switch (chk) { case DHTLIB_OK: Serial.print("OK,\t"); break; case DHTLIB_ERROR_CHECKSUM: Serial.print("Checksum error,\t"); break; case DHTLIB_ERROR_TIMEOUT: Serial.print("Time out error,\t"); break; default: Serial.print("Unknown error,\t"); break; } // DISPLAY DATA Serial.print(DHT.humidity, 1); Serial.print(",\t"); Serial.println(DHT.temperature, 1); delay(1000); // READ DATA Serial.print("DHT21, \t"); chk = DHT.read21(DHT21_PIN); switch (chk) { case DHTLIB_OK: Serial.print("OK,\t"); break; case DHTLIB_ERROR_CHECKSUM: Serial.print("Checksum error,\t"); break; case DHTLIB_ERROR_TIMEOUT: Serial.print("Time out error,\t"); break; default: Serial.print("Unknown error,\t"); break; } // DISPLAY DATA Serial.print(DHT.humidity, 1); Serial.print(",\t"); Serial.println(DHT.temperature, 1); delay(1000); // READ DATA Serial.print("DHT11, \t"); chk = DHT.read11(DHT11_PIN); switch (chk) { case DHTLIB_OK: Serial.print("OK,\t"); break; case DHTLIB_ERROR_CHECKSUM: Serial.print("Checksum error,\t"); break; case DHTLIB_ERROR_TIMEOUT: Serial.print("Time out error,\t"); break; default: Serial.print("Unknown error,\t"); break; } // DISPLAY DATA Serial.print(DHT.humidity,1); Serial.print(",\t"); Serial.println(DHT.temperature,1); delay(1000); } // // END OF FILE //