Troubleshooting BME280 Sensor Data Reading Issue on Raspberry Pi Pico with MicroPython

Hello, I am trying to interface a BME280 sensor with a Raspberry Pi Pico using MicroPython over I2C to monitor environmental conditions such as temperature, humidity, and pressure. However, I am encountering an issue with reading the sensor data, I have referred to the BME280 sensor documentation and the MicroPython library documentation to confirm the correct method for reading sensor data, I have examined the

bme280

bme280

library code to verify the methods available for reading data from the sensor, I reinstalled the

bme280

bme280

library to ensure it was correctly installed, I ran a simple I2C scan script to ensure that the BME280 sensor is properly connected and detected by the Raspberry Pi Pico.

i2c = I2C(0, scl=Pin(17), sda=Pin(16), freq=100000)
devices = i2c.scan()
print("I2C devices found:", devices)

i2c = I2C(0, scl=Pin(17), sda=Pin(16), freq=100000)
devices = i2c.scan()
print("I2C devices found:", devices)

But still getting the error

AttributeError: 'BME280' object has no attribute 'read_compensated_data'

AttributeError: 'BME280' object has no attribute 'read_compensated_data'

This is my code

from machine import I2C, Pin
import time
import bme280

# Initialize I2C
i2c = I2C(0, scl=Pin(17), sda=Pin(16), freq=100000)

# Create BME280 object
bme = bme280.BME280(i2c=i2c)

while True:
    temperature, pressure, humidity = bme.read_compensated_data()
    print(f"Temperature: {temperature/100:.2f} °C")
    print(f"Pressure: {pressure/256:.2f} hPa")
    print(f"Humidity: {humidity/1024:.2f} %")
    time.sleep(1)

from machine import I2C, Pin
import time
import bme280

# Initialize I2C
i2c = I2C(0, scl=Pin(17), sda=Pin(16), freq=100000)

# Create BME280 object
bme = bme280.BME280(i2c=i2c)

while True:
    temperature, pressure, humidity = bme.read_compensated_data()
    print(f"Temperature: {temperature/100:.2f} °C")
    print(f"Pressure: {pressure/256:.2f} hPa")
    print(f"Humidity: {humidity/1024:.2f} %")
    time.sleep(1)

@Middleware & OS

Solution

Hello @Enthernet Code

read_compensated_data()

read_compensated_data()

method doesn't exist in your BME280 library. Try adding this:

while True:
    print(f"Temperature: {bme.temperature:.2f} °C")
    print(f"Pressure: {bme.pressure:.2f} hPa")
    print(f"Humidity: {bme.humidity:.2f} %")
    time.sleep(1)

while True:
    print(f"Temperature: {bme.temperature:.2f} °C")
    print(f"Pressure: {bme.pressure:.2f} hPa")
    print(f"Humidity: {bme.humidity:.2f} %")
    time.sleep(1)

If this doesn't work, check your BME280 library's version

Jump to solution

RED HATAPP•7/8/24, 1:43 PM

Hi @Enthernet Code It looks like the method does not exist in the

bme280

bme280

library you are using. You might want to check the documentation or the source code of the library to find the correct method for reading data from the sensor

Solution

wafa_athAPP•7/8/24, 1:43 PM

Hello @Enthernet Code

read_compensated_data()

read_compensated_data()

method doesn't exist in your BME280 library. Try adding this:

while True:
    print(f"Temperature: {bme.temperature:.2f} °C")
    print(f"Pressure: {bme.pressure:.2f} hPa")
    print(f"Humidity: {bme.humidity:.2f} %")
    time.sleep(1)

while True:
    print(f"Temperature: {bme.temperature:.2f} °C")
    print(f"Pressure: {bme.pressure:.2f} hPa")
    print(f"Humidity: {bme.humidity:.2f} %")
    time.sleep(1)

If this doesn't work, check your BME280 library's version

Enthernet CodeAPP•7/8/24, 1:44 PM

okay would do