Sensors

BME280

Compact environmental sensor combining temperature, humidity, and barometric pressure.

Bosch SensortecActiveEasy

Best For

Projects needing Pressure and Humidity with a commonly available sensors part.

Avoid If

You need production-grade certainty without checking the exact module vendor, pinout, and library maintenance status.

Quick Decision Notes

BME280 is indexed as a sensors part from Bosch Sensortec. ChipScout tracks it by practical maker-facing dimensions: interfaces, library readiness, estimated price, field-level sources, and whether the page is strong enough for selection rather than only lookup.

Technical Specifications

MeasurementTemperature + humidity + pressureSource: Bosch Sensortec
InterfaceI2C / SPISource: Bosch Sensortec
Pressure Range300 - 1100 hPaSource: Bosch Sensortec
Working Voltage1.71V - 3.6VSource: Bosch Sensortec

Common Use Cases

  • Maker prototypes
  • Low-cost modules
  • Educational hardware

Known Issues

  • Breakout boards may use different pin labels or regulator choices
  • Clone modules can differ from the original datasheet part

Interfaces and Library Support

Interfaces
I2CSPI
Wireless
None
Voltage
3.3V
Libraries
Arduino verifiedMicroPython verified
Data Integrity94% confidence
Sourcehttps://www.bosch-sensortec.com/products/environmental-sensors/humidity-sensors-bme280/
Last verified2026-05-20
Core specsVerified
PinoutAvailable
Library supportChecked
Price rangePresent
Found a wrong spec?

Every field is meant to be source-backed. Corrections should include a datasheet URL, vendor page, module photo, or reproducible library test.

Submit correction

Source Resources

Pinout Table

VCC3V3 / VCCPower · 3.3V module · Check breakout regulator before using 5V.
GNDGNDPower · Common ground with controller.
SDASDABidirectional · Use board I2C data pin and pull-ups.
SCLSCLInput · Use board I2C clock pin.

Pinout is not yet source-verified. Use the table as an integration checklist, then confirm exact pins against the module vendor page before wiring hardware.

Common Wiring

VCC

Power · 3.3V module · Check breakout regulator before using 5V.

GND

Power · Common ground with controller.

SDA

Bidirectional · Use board I2C data pin and pull-ups.

SCL

Input · Use board I2C clock pin.

Arduino Example

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin();
  Serial.println("BME280 I2C scan");
}

void loop() {
  byte count = 0;
  for (byte address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    if (Wire.endTransmission() == 0) {
      Serial.print("Found I2C device at 0x");
      Serial.println(address, HEX);
      count++;
    }
  }
  Serial.print("Device count: ");
  Serial.println(count);
  delay(3000);
}

MicroPython Example

from machine import Pin, I2C
import time

i2c = I2C(0, scl=Pin(1), sda=Pin(0), freq=100000)
print("BME280 I2C addresses:", [hex(x) for x in i2c.scan()])

while True:
    # Replace with the verified BME280 driver read call.
    time.sleep(2)

Recommended Development Boards

ESP32-C3 weather node

Good Wi-Fi telemetry host for pressure, humidity, and temperature.

Raspberry Pi Pico W

Good MicroPython board for low-cost weather station prototypes.

Feather ESP32

Convenient battery and Qwiic/Stemma-style wiring ecosystem.

Alternative Model Reasons

BMP280SensorsChoose when pressure and temperature are enough and humidity is not needed.
AHT20SensorsChoose when low-cost temperature/humidity is more important than pressure.
ACS712SensorsCompare this option when price or module availability is the deciding constraint.
ADXL345SensorsCompare this option when price or module availability is the deciding constraint.

Common Questions

What is BME280 best used for?

Projects needing Pressure and Humidity with a commonly available sensors part.

Does BME280 support Arduino or MicroPython?

BME280 has verified Arduino support and verified MicroPython support.

What interfaces does BME280 use?

BME280 lists I2C, SPI; wireless support is no wireless protocol.

Compare BME280 vs BMP280

Alternatives and Related Parts