Sensors
BME280
Compact environmental sensor combining temperature, humidity, and barometric pressure.
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
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
Every field is meant to be source-backed. Corrections should include a datasheet URL, vendor page, module photo, or reproducible library test.
Submit correctionSource Resources
Pinout Table
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
Power · 3.3V module · Check breakout regulator before using 5V.
Power · Common ground with controller.
Bidirectional · Use board I2C data pin and pull-ups.
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
Good Wi-Fi telemetry host for pressure, humidity, and temperature.
Good MicroPython board for low-cost weather station prototypes.
Convenient battery and Qwiic/Stemma-style wiring ecosystem.
Alternative Model Reasons
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.
Alternatives and Related Parts
BMP280
Bosch Sensortec
Barometric pressure and temperature sensor used for altitude and weather projects.
AHT20
Aosong
Popular Chinese I2C temperature and humidity sensor used as a low-cost SHT-series alternative.
ACS712
Allegro MicroSystems
Hall-effect current sensor module used for AC/DC current measurement projects.
ADXL345
Analog Devices
3-axis digital accelerometer with broad maker library support.