BME280 Temperature Humidity Barometric Pressure Sensor Module (I2C/SPI)

Bosch 3-in-1 sensor measuring temperature, humidity and barometric pressure over I2C/SPI, popular for weather and altitude projects.

₹190 + 18% GST

SKU: BOTBIT-SEN-03 · Best for: Indoor and outdoor weather stations with pressure trends

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Overview

About BME280 Temperature Humidity Barometric Pressure Sensor Module (I2C/SPI).

The BME280 is a Bosch 3-in-1 environmental sensor that measures temperature, relative humidity and barometric pressure in a single tiny package, communicating over both I2C and SPI. It is one of the most popular precision environmental sensors for makers because it delivers laboratory-grade stability at a very low price and can be read with well-supported Arduino and Python libraries.

Because it also measures barometric pressure, the BME280 can estimate altitude, making it a favourite for weather stations, drones, and altitude-tracking projects in addition to indoor climate monitoring. The breakout module includes onboard level-shifting and a voltage regulator on many versions, so it works with both 3.3V and 5V systems.

For Indian makers, the BME280 is the go-to upgrade when a DHT22 is not enough, adding pressure/altitude and much better temperature and humidity accuracy. Be aware many low-cost 'BME280' boards actually carry the BMP280 (no humidity), so buying from a trusted seller matters.

Key features

Why it stands out.

Three measurements in one chip: temperature, humidity and barometric pressure

Supports both I2C (default) and SPI interfaces

Barometric pressure enables altitude estimation for weather and drone projects

High humidity accuracy of +/-3% RH and pressure accuracy of about +/-1 hPa

Low power operation, ideal for battery-powered IoT and wearable nodes

Well supported by Adafruit and Bosch BSEC libraries for Arduino, ESP and Raspberry Pi

Specifications

Selection facts.

Measurements	Temperature, Humidity, Barometric Pressure
Manufacturer	Bosch Sensortec BME280
Temperature Range	-40 to 85 degC (+/-1 degC accuracy)
Humidity Range	0 to 100% RH (+/-3% RH accuracy)
Pressure Range	300 to 1100 hPa (+/-1 hPa accuracy)
Interface	I2C (up to 3.4 MHz) and SPI (up to 10 MHz)
I2C Address	0x76 or 0x77 (selectable)
Supply Voltage	3.3V (modules often accept 3.3V-5V via onboard regulator)
Current	~3.6 uA at 1 Hz (all sensors active)
Package	2.5 x 2.5 x 0.93 mm LGA on breakout board

Applications

Where it is used.

Indoor and outdoor weather stations with pressure trends
Altitude estimation for drones, rockets and hiking devices
IoT indoor climate and air-comfort monitoring
Home automation environment sensing over Wi-Fi (ESP32/ESP8266)
Battery-powered environmental data loggers
Weather forecasting and pressure-trend hobby projects

Buying guide

How to choose.

Pick the BME280 when you need accurate temperature, humidity and barometric pressure together, or when you want altitude estimation. It is the right upgrade from a DHT22 for weather stations, drones and precision indoor monitoring. If you do not need humidity, the cheaper BMP280 measures only pressure and temperature.

Confirm you are buying a genuine BME280 (humidity-capable), because many low-cost boards are actually BMP280. Check the I2C address (0x76 or 0x77) so it does not clash with other sensors on the bus. Most breakout boards support both 3.3V and 5V, but the bare chip is 3.3V, so use a board with level shifting for 5V Arduinos.

Pair it with an ESP32/ESP8266 for Wi-Fi weather nodes, or a Raspberry Pi/Arduino with the Adafruit BME280 library. For gas/air-quality sensing as well, look at the BME680.

FAQ

Common questions.

What is the difference between BME280 and BMP280?

The BME280 measures temperature, humidity and pressure. The BMP280 measures only temperature and pressure (no humidity). Many cheap boards labelled BME280 are actually BMP280, so verify with the seller.

Does it use I2C or SPI?

Both. Most projects use I2C (address 0x76 or 0x77) because it needs only two data wires. SPI is available for higher speed or to avoid address conflicts.

Can it measure altitude?

Yes, indirectly. By reading barometric pressure and referencing sea-level pressure, libraries calculate an estimated altitude. This is why it is popular for drones and weather projects.

Which library and wiring do I use?

The Adafruit BME280 library (Arduino) or Bosch BSEC is common. For I2C connect VCC, GND, SDA and SCL; set the I2C address to match your board (0x76 or 0x77).

Is it available in India and 5V-safe?

Yes, it is widely stocked in India. The Bosch chip itself is 3.3V, but most breakout modules include a regulator and level shifting so they can be powered from 3.3V or 5V. Check your specific board.