Humidity sensor arduino

DHT-11 with Arduino and LCD display

Components required:-

1.Arduino Uno

2. 16x2 LCD display

3.DHT-11

DHT-11 module

This module is used to measure humidity and temperature of surrounding. It comprises a thermistor and a capacitive humidity plates to measure temperature and humidity.

TECHNICAL DETAILS:-

• 3 to 5V power
• 2.5mA max current usage
• 2 seconds sampling rate

Circuit diagram

1.Connect LCD with Arduino as mentioned here.

2.Connect + terminal of DHT-11 to 5volts of Arduino.

3.Connect - terminal of DHT-11 to GND of Arduino.

4.Connect OUT terminal of DHT-11 to A0 pin of Arduino.

Arduino Code

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#include <LiquidCrystal.h>

#include "DHT.h"

DHT dht(A0, DHT11);

LiquidCrystal lcd(6,7,8,9,10,11,12);

float humidity,celcius,fahrenheit;

void setup() {

  lcd.begin(16,2);

  dht.begin();

}

void loop() 

{

  delay(2000);

  lcd.clear();

  humidity = dht.readHumidity();

  celcius = dht.readTemperature();

  lcd.print("Humidity:");

  lcd.print(humidity);

  lcd.print("%");

  lcd.setCursor(0,1);

  lcd.print(celcius);

  lcd.print("C || ");

  fahrenheit=1.8*celcius + 32;

  lcd.print(fahrenheit);

  lcd.print("F");

}

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To understand  this project in more  detail, click here or on this image to understand this project in detail