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BME280 Interfacing with Raspberry Pi Pico RP2040

Hello guys, In this blog I am going to interface BME280 sensor with Raspberry Pi Pico using micropython. The breakout module is equipped with a BME280 digital temperature, humidity and pressure sensor, which is a successor to the popular BMP180 and BMP183 sensors.

This BME280 sensor can measure temperature from -40°C - 85°C with ±1.0°C of accuracy, Humidity from 0-100 with ±3% of accuracy and Pressure from 300Pa - 1100 hPa with +1% hPa of accuracy.

For this blog i am going to use BME280 breakout board which comes with inbuilt LM6206 3.3 volt voltage regulator and voltage level translator for I2C. this module comes with pre-calibrated sensor with easy to use interface.

Circuit Diagram

Source Code (MicroPython)

import machine
import bme280
i2c = I2C(0, freq=399361, scl=Pin(21), sda=Pin(20))
bme = bme280.BME280(i2c=i2c, address=0x76)
print("Temp: {temp} Pressure: {pre} Hum: {hum}".format(temp=bme.values[0],pre=bme.values[1],hum=bme.values[2]))

BME280 Library 

save below file as bme280.py in Raspberry pi pico before running the source code.


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