In this comprehensive tutorial, you'll learn how to build a complete weather station using a Raspberry Pi and various sensors. We'll cover hardware setup, software programming, and data visualization.

Materials Needed:

• Raspberry Pi 4 (2GB+ recommended)
• DHT22 temperature and humidity sensor
• BMP280 barometric pressure sensor
• Jumper wires and breadboard
• Optional: LCD display for local readings

Code Preview:

import Adafruit_DHT
import time
import smbus2
import bmp280

# Setup for DHT22 sensor
DHT_SENSOR = Adafruit_DHT.DHT22
DHT_PIN = 4

# Setup for BMP280 sensor
bus = smbus2.SMBus(1)
bmp280_sensor = bmp280.BMP280(i2c_dev=bus)

def read_sensors():
    # Read temperature & humidity from DHT22
    humidity, temperature = Adafruit_DHT.read_retry(DHT_SENSOR, DHT_PIN)
    
    # Read pressure from BMP280
    pressure = bmp280_sensor.get_pressure()
    
    return temperature, humidity, pressure

# Main loop
while True:
    temp, humidity, pressure = read_sensors()
    print(f"Temperature: {temp:.1f}°C")
    print(f"Humidity: {humidity:.1f}%")
    print(f"Pressure: {pressure:.2f} hPa")
    
    # Add code for data logging or display here
    
    time.sleep(60)  # Read every minute