80 lines
1.6 KiB
C++
80 lines
1.6 KiB
C++
//
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// FILE: DHT20_test_esp.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: Demo for DHT20 I2C humidity & temperature sensor
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// URL: https://github.com/RobTillaart/DHT20
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//
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// Always check datasheet - front view
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//
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// +--------------+
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// VDD ----| 1 |
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// SDA ----| 2 DHT20 |
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// GND ----| 3 |
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// SCL ----| 4 |
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// +--------------+
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#include "DHT20.h"
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DHT20 DHT(&Wire1); // 2nd I2C interface
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.print("DHT20 LIBRARY VERSION: ");
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Serial.println(DHT20_LIB_VERSION);
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Serial.println();
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Wire1.begin(12, 13); // select your pin numbers here
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delay(2000);
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Serial.println("Type,\tStatus,\tHumidity (%),\tTemperature (C)");
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}
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void loop()
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{
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// READ DATA
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Serial.print("DHT20, \t");
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int status = DHT.read();
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switch (status)
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{
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case DHT20_OK:
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Serial.print("OK,\t");
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break;
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case DHT20_ERROR_CHECKSUM:
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Serial.print("Checksum error,\t");
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break;
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case DHT20_ERROR_CONNECT:
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Serial.print("Connect error,\t");
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break;
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case DHT20_MISSING_BYTES:
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Serial.print("Missing bytes,\t");
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break;
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case DHT20_ERROR_BYTES_ALL_ZERO:
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Serial.print("All bytes read zero");
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break;
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case DHT20_ERROR_READ_TIMEOUT:
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Serial.print("Read time out");
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break;
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case DHT20_ERROR_LASTREAD:
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Serial.print("Error read too fast");
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break;
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default:
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Serial.print("Unknown error,\t");
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break;
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}
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// DISPLAY DATA, sensor has only one decimal.
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Serial.print(DHT.getHumidity(), 1);
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Serial.print(",\t");
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Serial.println(DHT.getTemperature(), 1);
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delay(2000);
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}
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// -- END OF FILE --
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