BMP388 - Precision Barometric Pressure and Altimeter

High-precision Bosch BMP388 barometric pressure and temperature sensor breakout, selectable I2C or SPI. Improved accuracy over BMP280 makes it well-suited for precision altimetry in drones and environmental monitoring.

Logical pinout · physical placement not verified

One grouped source record is expanded into separate logical pads where unambiguous; physical placement is not implied.

VIN
Board power input. Adafruit states the onboard regulator takes 3-5VDC and converts it down for the BMP3xx sensor.
Type · PowerVoltage · 3-5V DC input
3Vo
3.3V output from the onboard voltage regulator, available for small external loads.
Type · PowerVoltage · 3.3V output, up to 100mA per Adafruit guide
GND
Common ground for power and logic.
Type · GroundVoltage · 0V
SCKSCL
SPI clock input, also I2C clock when using I2C mode. Adafruit states breakout inputs are 3-5V logic-level safe.
Type · I2C, SPIVoltage · 3-5V logic input
SDO
SPI serial data out / MISO from the BMP3xx to the controller.
Type · SignalVoltage · 3.3V logic output, readable by 5V microcontrollers
SDASDI
I2C data line, also SPI serial data in / MOSI to the BMP3xx.
Type · I2C, SignalVoltage · 3-5V logic input
CS
SPI chip-select input, pulled low to start an SPI transaction.
Type · SPIVoltage · 3-5V logic input
INT
Interrupt output from the BMP3xx for data-ready signalling.
Type · SignalVoltage · 3.3V logic output, readable by 5V microcontrollers

Pin	Type	Function	Voltage
VIN	Power	Board power input. Adafruit states the onboard regulator takes 3-5VDC and converts it down for the BMP3xx sensor.	3-5V DC input
3Vo	Power	3.3V output from the onboard voltage regulator, available for small external loads.	3.3V output, up to 100mA per Adafruit guide
GND	Ground	Common ground for power and logic.	0V
SCKSCL	I2C, SPI	SPI clock input, also I2C clock when using I2C mode. Adafruit states breakout inputs are 3-5V logic-level safe.	3-5V logic input
SDO	Signal	SPI serial data out / MISO from the BMP3xx to the controller.	3.3V logic output, readable by 5V microcontrollers
SDASDI	I2C, Signal	I2C data line, also SPI serial data in / MOSI to the BMP3xx.	3-5V logic input
CS	SPI	SPI chip-select input, pulled low to start an SPI transaction.	3-5V logic input
INT	Signal	Interrupt output from the BMP3xx for data-ready signalling.	3.3V logic output, readable by 5V microcontrollers

Logical pinout · physical placement not verified

One grouped source record is expanded into separate logical pads where unambiguous; physical placement is not implied.

Pin details

8 connections

VIN
Board power input. Adafruit states the onboard regulator takes 3-5VDC and converts it down for the BMP3xx sensor.
PowerVoltage · 3-5V DC input
3Vo
3.3V output from the onboard voltage regulator, available for small external loads.
PowerVoltage · 3.3V output, up to 100mA per Adafruit guide
GND
Common ground for power and logic.
GroundVoltage · 0V
SCKSCL
SPI clock input, also I2C clock when using I2C mode. Adafruit states breakout inputs are 3-5V logic-level safe.
I2C, SPIVoltage · 3-5V logic input
SDO
SPI serial data out / MISO from the BMP3xx to the controller.
SignalVoltage · 3.3V logic output, readable by 5V microcontrollers
SDASDI
I2C data line, also SPI serial data in / MOSI to the BMP3xx.
I2C, SignalVoltage · 3-5V logic input
CS
SPI chip-select input, pulled low to start an SPI transaction.
SPIVoltage · 3-5V logic input
INT
Interrupt output from the BMP3xx for data-ready signalling.
SignalVoltage · 3.3V logic output, readable by 5V microcontrollers

Start wiring

I2C · SPI · Single data line · 3.3 – 5 V · Breakout

Confirm the data interface matches your host board.

Module pins: VIN, 3Vo, GND, SCK / SCL, SDO, SDA / SDI, CS, INT. Schematik maps them to your board in the app.

Temp & humidity

165 other options

DHT/AHT sensors, SHT-series humidity chips, BMP and LPS barometers, BME combined sensors, DS18B20 probes, thermocouple amplifiers and non-contact MLX IR sensors — about 165 listings, very different accuracy classes.

View all 165

Related groups

4 groups

Biometrics

UART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.

Sensors · Biometric sensors · 26 parts

Cameras

Pi CSI modules, USB cameras, MCU-class OV2640/OV5640 boards, on-camera AI like HuskyLens and OpenMV, and thermal or ToF imagers — over 130 listings across very different pipelines.

Sensors · Cameras & vision · 141 parts

Power monitors

INA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.

Sensors · Current & voltage · 25 parts

Distance sensors

About 180 listings spanning VL53-series ToF breakouts, HC-SR04 and MaxSonar ultrasonics, 360° triangulation LiDARs, IR proximity sensors, 24GHz mmWave presence detection and laser break-beam sensors.

Sensors · Distance sensors · 177 parts

Pinout