This tutorial will show you how to set up and use a DHT11 or DHT22 temp and humidity sensor with a ARDUINO board & LCD screen.

Click on video below for full tutorial…..

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 LCD library for ARDUINO and more info on the I2C LCD screen can be found here

PARTS LIST:

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ARDUINO Board

I2C 1602 LCD SCREEN

DHT11 or DHT22 Temp & humidity Sensor

Bread Board

Jumper Wires

THE SCHEMATIC:

ARDUINO CODE:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3f, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
#include <SimpleDHT.h>
#define pinDHT11 6 //data pin
SimpleDHT11 dht11;

void setup() {
lcd.begin(16, 2); // initialize the lcd for 16 chars 2 lines
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(“Temperature”);
lcd.setCursor(14, 0);
lcd.print(“C”);
lcd.setCursor(0, 1);
lcd.print(“Humidity”);
lcd.setCursor(11, 1);
lcd.print(“%”);
}

void loop() {
byte temperature = 0;
byte humidity = 0;
if (dht11.read(pinDHT11, &temperature, &humidity, NULL)) {
Serial.print(“Read DHT11 failed.”);
return;
}
lcd.setCursor(12, 0);
lcd.print((int)temperature);
lcd.setCursor(9, 1);
lcd.print((int)humidity);

delay(1000);
}