Published September 3, 2016 © GPL3+

Arduino LCD Thermostat

A simple, yet effective, temperature telling device that updates every 5 minutes giving you the temperature of your room!

BeginnerFull instructions provided1 hour38,877

Things used in this project

Hardware components

DHT11 Temperature & Humidity Sensor (4 pins)

Jumper wires (generic)

Arduino UNO

16x2 LCD

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

3D Printer (generic)

Optional

Story

To make this simple project first attach the DHT sensor to the Arduino by connecting the pins as follows:

DHT VCC -> 5v 
DHT Data -> Arduino 8 
DHT GND -> Arduino GND 
10k resistor -> across DHT VCC and DHT Data.

Then attach the LCD according to the schematic. Copy and paste the code into the Arduino IDE and upload it. If you are confused with any of this watch the video below or leave a comment. Once done it should look like this:

Thanks!

The video:

Code

Arduino Code

#include "DHT.h"
#include "LiquidCrystal.h"

#define DHTPIN 9
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // put your setup code here, to run once:
dht.begin();
lcd.begin(16,2);
lcd.print("The current temp");
lcd.setCursor(0,1);
lcd.print("is: ");
float f = dht.readTemperature(true);
lcd.setCursor(5,1);
lcd.print(f);
lcd.print(" F");
}

void loop() {
delay(1000*60*5);
// put your main code here, to run repeatedly:
float f = dht.readTemperature(true);
lcd.setCursor(5,1);
lcd.print(f);
lcd.print(" F");
}