how to connect a temperature sensor to your Raspberry Pi and display the current temperature on a screen or console

Raspberry Pi Temperature Sensor Tutorial

In this tutorial, we'll show you how to connect a temperature sensor to your Raspberry Pi and display the current temperature on a screen or console.

Materials

• Raspberry Pi
• Temperature sensor (e.g., DS18B20)
• Breadboard
• Jumper wires

Wiring

Connect the temperature sensor to the Raspberry Pi as follows:

• VCC (red wire) to 3.3V
• GND (black wire) to GND
• DATA (yellow wire) to GPIO4

Code

We'll use the following Python code to read the temperature from the sensor and display it on the console:

import os
import time

# Define the GPIO pin number connected to the temperature sensor
GPIO_PIN = 4

# Define the function to read the temperature from the sensor
def read_temperature():
    # Open the temperature sensor file
    with open("/sys/bus/w1/devices/28-00000569653b/w1_slave") as f:
        # Read the first line of the file
        line = f.readline()

        # Split the line by the equals sign
        parts = line.split("=")

        # The temperature is the second part of the split line
        temperature = float(parts[1]) / 1000

        # Return the temperature
        return temperature

# Main program
try:
    while True:
        # Read the temperature from the sensor
        temperature = read_temperature()

        # Print the temperature to the console
        print("Current temperature: {} degrees Celsius".format(temperature))

        # Wait for 10 seconds before reading the temperature again
        time.sleep(10)
except KeyboardInterrupt:
    # Exit the program when the user presses Ctrl+C
    pass
    

Next Steps

Now that you have a basic temperature sensor working, you can use it to build more complex projects, such as:

• A weather station that displays the temperature, humidity, and barometric pressure
• A home automation system that turns on the air conditioning when the temperature gets too high
• A science experiment that measures the temperature of different objects

Troubleshooting

• If you're not getting any readings from the temperature sensor, check your wiring and make sure that the sensor is properly connected to the Raspberry Pi.
• If you're getting incorrect readings, try recalibrating the sensor by following the instructions in the sensor's datasheet.