Arduino Temperature and Humidity Sensor with LCD

Article Summary

In this article, we will discuss how to build an Arduino project using a temperature and humidity sensor integrated with an LCD display. We will cover the necessary components, wiring connections, and code implementation. The article will be structured as follows:

1. Introduction
2. Components Needed
3. Wiring Connections
4. Coding the Arduino
5. Summary

Introduction

Arduino is a versatile platform for building various electronic projects. In this tutorial, we will focus on creating a temperature and humidity monitoring system using an Arduino board, a temperature and humidity sensor, and an LCD display.

Components Needed

• Arduino board (e.g., Arduino Uno)
• Temperature and humidity sensor (e.g., DHT11 or DHT22)
• LCD display (e.g., 16×2 character LCD)
• Jumper wires
• Breadboard or prototyping board

Wiring Connections

Before starting the project, it’s crucial to establish the correct connections between the components. Follow these steps:

1. Connect the VCC pin of the sensor to the 5V pin on the Arduino board.
2. Connect the GND pin of the sensor to the GND pin on the Arduino board.
3. Connect the data pin of the sensor to any digital pin on the Arduino board (e.g., pin 7).
4. Connect the LCD display as follows:
   • Connect the VCC pin of the LCD display to the 5V pin on the Arduino board.
   • Connect the GND pin of the LCD display to the GND pin on the Arduino board.
   • Connect the SDA pin of the LCD display to any digital pin on the Arduino board (e.g., pin 12).
   • Connect the SCL pin of the LCD display to any digital pin on the Arduino board (e.g., pin 11).

Coding the Arduino

The next step is to write the Arduino code that will read the temperature and humidity values from the sensor and display them on the LCD display. Here is a sample code:

#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#define DHTPIN 7
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  dht.begin();
  lcd.begin(16, 2);
  lcd.print("Temperature:");
}
void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  lcd.setCursor(0, 1);
  lcd.print("Temp: " + String(temperature) + "C  Humidity: " + String(humidity) + "%");
  delay(2000);
}

Summary

In this tutorial, we have learned how to build an Arduino project using a temperature and humidity sensor integrated with an LCD display. We discussed the required components, wiring connections, and provided a sample Arduino code for this project. By following the steps outlined in this article, you can create your own temperature and humidity monitoring system using Arduino.