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March 8, 2017 14:03
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Read DHT11 Sensor and output to Serial line
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#include <Adafruit_Sensor.h> | |
// Example testing sketch for various DHT humidity/temperature sensors | |
// Written by ladyada, public domain | |
#include "DHT.h" | |
#define DHTPIN 8 // 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) | |
// Connect pin 1 (on the left) of the sensor to +5V | |
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1 | |
// to 3.3V instead of 5V! | |
// Connect pin 2 of the sensor to whatever your DHTPIN is | |
// Connect pin 4 (on the right) of the sensor to GROUND | |
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor | |
// Initialize DHT sensor. | |
// Note that older versions of this library took an optional third parameter to | |
// tweak the timings for faster processors. This parameter is no longer needed | |
// as the current DHT reading algorithm adjusts itself to work on faster procs. | |
DHT dht(DHTPIN, DHTTYPE); | |
void setup() { | |
Serial.begin(9600); | |
Serial.println("**** ANLY 510: Temperature & Humidity Data ****"); | |
Serial.println("Hum, TempF, TempC, HInx, eol"); | |
dht.begin(); | |
} | |
void loop() { | |
// Wait a few seconds between measurements. | |
delay(5000); | |
// Reading temperature or humidity takes about 250 milliseconds! | |
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) | |
float h = dht.readHumidity(); | |
// Read temperature as Celsius (the default) | |
float t = dht.readTemperature(); | |
// Read temperature as Fahrenheit (isFahrenheit = true) | |
float f = dht.readTemperature(true); | |
// Check if any reads failed and exit early (to try again). | |
if (isnan(h) || isnan(t) || isnan(f)) { | |
Serial.println("NA,NA,NA,NA,EOL"); | |
return; | |
} | |
// Compute heat index in Fahrenheit (the default) | |
float hif = dht.computeHeatIndex(f, h); | |
// Compute heat index in Celsius (isFahreheit = false) | |
float hic = dht.computeHeatIndex(t, h, false); | |
Serial.print(h); | |
Serial.print(", "); | |
Serial.print(f); | |
Serial.print(", "); | |
Serial.print(t); | |
Serial.print(", "); | |
Serial.print(hic); | |
Serial.print(", "); | |
Serial.println("EOL"); | |
// 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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