Adafruit
Adafruit BMP388 - Precision Barometric Pressure and Altimeter
The BMP388 from Bosch is a high-precision barometric pressure and temperature sensor, offering significantly improved altitude accuracy over the BMP280. With...
The BMP388 from Bosch is a high-precision barometric pressure and temperature sensor, offering significantly improved altitude accuracy over the BMP280. With altitude noise as low as 0.1 metres and a relative accuracy of 8 Pascals (±0.5 m), it is an excellent choice for drone altitude hold, wearable altimeters, and precision environmental sensing.
Like its predecessors, the BMP388 supports both I2C and SPI interfaces. Use I2C for simple wiring, or SPI to connect multiple sensors without address collisions. The breakout board includes a 3.3V regulator and level shifting for easy use with both 3V and 5V microcontrollers.
Key Features
- Barometric Pressure – 8 Pascal relative accuracy (vs 12 Pa on BMP280)
- Altitude Precision – ±0.5 metre accuracy with 0.1 m noise floor
- Temperature – ±0.5°C accuracy
- Dual Interface – I2C and SPI communication
- Voltage Range – 3–5V operation via onboard regulator and level shifting
- Fast Conversion – Quick sampling for responsive flight control
Also Available
- Adafruit BMP280 – Previous generation with ±1 m altitude accuracy
- Adafruit BME280 – Adds humidity sensing to pressure and temperature
- Adafruit BME680 – Adds humidity and VOC gas sensing
Ideal For
- Drone and quadcopter altitude hold
- Wearable altimeters and fitness devices
- High-precision weather stations
- Height-above-sea-level tracking applications
Package Contents
- 1× Adafruit BMP388 precision barometric pressure sensor breakout
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V regulator
- A 3.3V regulator is a power circuit that provides a steady 3.3 volts for parts that need that supply voltage. On a breakout board, it can let the sensor run safely even when the connected microcontroller or power source uses a higher voltage.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- VOC
- Volatile organic compounds are gases released from things like paints, cleaners, smoke, and some plastics. A VOC reading helps indicate indoor air quality, but it is usually an index or estimate rather than a direct identification of each chemical.
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