How to Connect BME280 to Raspberry Pi Pico (Physical Setup and Code)

The BME280 is a sensor that measures temperature, humidity, and pressure. It is often used in weather stations, environmental monitoring systems, and other applications that require accurate measurement of these parameters. The sensor is small and low-power, making it suitable for use in portable devices and battery-powered systems. It communicates with a microcontroller or computer via I2C or SPI interface.

In this tutorial, I will show you how to quickly set it up for the Raspberry Pi Pico.

1-) Raspberry Pi Pico W

2-) BME280 Pressure, Temperature, and Humidity Sensor Soldered

3-) Jumper Wires

4-) Breadboard

You will need four jumper wires to connect your BME280 to your Raspberry Pi Pico. This is shown in the diagram. This is all you need in terms of the physical setup.

Note you do not have to use a breadboard, you can use a female-to-female connector if you have your Raspberry Pi Pico W soldered with pins. I recommend a breadboard in general and I already assume you have some at handy if you are working with electronics.

I used the Thonny Package manager to simply download the package.

Go to Tools > Packages and then search BME280, download the MicroPython version!

If you are not using Thonny you can find the code online and just copy it to a file on your Pi. Here is the GitHub page for their library.

GitHub

from machine import Pin, I2C        #importing relevant modules & classes
from time import sleep

import bme280       #importing BME280 library
	

i2c=I2C(0,sda=Pin(0), scl=Pin(1), freq=400000)    #initializing the I2C method 
	
while True:
    bme = bme280.BME280(i2c=i2c)          #BME280 object created
	print(bme.values)
	sleep(2)           #delay of 2s

Once this is set up you should be able to run the code and start getting readings for temperature, humidity, and pressure! Good luck!

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