Arduino weather Station: Monitor Realtime Temperature and Humidity

An Arduino uno based weather station is a simple electronic project for electronics engineering students. This will helps us to measure the temperature and humidity using a DHT11 sensor connected with the Arduino. The measured climate data like temperature and humidity will be displayed on a LCD screen.

Arduino Weather Station Circuit

The DHT11 sensor module is connected to the Arduino UNO, which reads the real time environmental data and displays it for display. The I2C module reduces the number of pins needed for the LCD connections with the arduino. This project is ideal for beginners in electronics and Arduino programming as it provides hands on experience with sensor integration and data visualization.

To build this weather station you need an Arduino UNO board which receiving temperature and humidity values from the DHT11 sensor. The sensor requires a simple three wire connection for power, ground, and data transmission. The I2C LCD module connects with just four wires (VCC, GND, SDA, SCL) to the Arduino. The Arduino reads the sensor data and sends it to the LCD for real time monitoring. I will give you the code to program the arduino and this code will work and display continuously updates and show the latest environmental conditions.

Components Required to Build Arduino Weather Station Circuit

Component	Quantity
Arduino UNO	1
DHT11 Sensor	1
LCD Display (16×2) with I2C Module	1
Jumper Wires	Several
Breadboard (optional)	1

This weather station project can be expanded by adding additional sensors, such as a barometric pressure sensor or a light sensor to collect more environmental data. The data can also be stored on an SD card or transmitted wirelessly using modules like ESP8266 for remote monitoring. Such an upgrade would make it useful for smart home applications and weather tracking systems.

Arduino Weather Station Programming Code

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
//solderingmind.com

// Initialize the LCD library with the I2C address of your module
LiquidCrystal_I2C lcd(0x27, 16, 2); 

// Define DHT11 pin
#define DHTPIN 2
// Define DHT type
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // Initialize the LCD
  lcd.begin();
  lcd.backlight();
  
  // Start DHT sensor
  dht.begin();
  
  // Print initial message
  lcd.setCursor(0, 0);
  lcd.print("Temp & Humidity");
  lcd.setCursor(0, 1);
  lcd.print("Measuring...");
  
  // Wait a few seconds between measurements
  delay(2000);
}

void loop() {
  // Read temperature as Celsius
  float tempC = dht.readTemperature();
  // Read humidity
  float humidity = dht.readHumidity();
  
  // Check if any reads failed and exit early (to try again)
  if (isnan(tempC) || isnan(humidity)) {
    lcd.setCursor(0, 0);
    lcd.print("Failed to read");
    lcd.setCursor(0, 1);
    lcd.print("from DHT sensor");
    return;
  }
  
  // Print temperature and humidity to LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(tempC);
  lcd.print(" C");
  
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  // Wait a few seconds between measurements
  delay(2000);
}