Weather Station Project for School Kids

This Arduino-based weather station will measure temperature, humidity, and atmospheric pressure.

🔧 Requirements (Materials Needed)

1️⃣ Electronic Components:

✅ Arduino Uno (or Nano) – The brain of the project
✅ DHT11 or DHT22 Sensor – Measures temperature & humidity
✅ BMP180 Sensor – Measures atmospheric pressure
✅ 16×2 LCD Display with I2C Module – Displays weather data
✅ Jumper Wires & Breadboard – For easy connections
✅ 9V Battery & Connector – To power the system

🛠️ How to Build the Weather Station

Step 1: Wiring the Circuit

Connections for DHT11 Sensor:

Connections for BMP180 Sensor:

Connections for LCD Display:

• Connect I2C LCD module:
  • SDA to A4
  • SCL to A5
  • VCC to 5V
  • GND to GND

Step 2: Upload the Code to Arduino

Here’s a simple Arduino program to read and display the weather data:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Adafruit_BMP085.h>

// Sensor and LCD setup
#define DHTPIN 2
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
Adafruit_BMP085 bmp;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.begin();
  lcd.backlight();
  dht.begin();
  bmp.begin();
}

void loop() {
  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();
  float pressure = bmp.readPressure() / 100.0; // Convert to hPa

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: "); lcd.print(temp); lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Hum: "); lcd.print(humidity); lcd.print("% ");
  lcd.print("P: "); lcd.print(pressure); lcd.print("hPa");

  delay(2000); // Refresh data every 2 seconds
}

Step 3: Assemble the Components on a Board

• Mount the LCD display and sensors securely on a cardboard or wooden base.
• Keep wires organized to avoid tangling.
• Attach a small plastic case for the Arduino and battery.

Step 4: Testing the Weather Station

• Power on the Arduino.
• The temperature, humidity, and pressure values should display on the LCD.
• Compare readings with real weather data to check accuracy.

🛠️ Circuit Diagram