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.
One grouped connection is listed in the table but omitted from the graphic until individual pins are available.
Board power input. Adafruit states the onboard regulator takes 3-5VDC and converts it down for the BMP3xx sensor.
3.3V output from the onboard voltage regulator, available for small external loads.
Common ground for power and logic.
SPI clock input, also I2C clock when using I2C mode. Adafruit states breakout inputs are 3-5V logic-level safe.
SPI serial data out / MISO from the BMP3xx to the controller.
I2C data line, also SPI serial data in / MOSI to the BMP3xx.
SPI chip-select input, pulled low to start an SPI transaction.
Interrupt output from the BMP3xx for data-ready signalling.
| 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 |
One grouped connection is omitted from the graphic until individual pins are available.
Board power input. Adafruit states the onboard regulator takes 3-5VDC and converts it down for the BMP3xx sensor.
3.3V output from the onboard voltage regulator, available for small external loads.
Common ground for power and logic.
SPI clock input, also I2C clock when using I2C mode. Adafruit states breakout inputs are 3-5V logic-level safe.
SPI serial data out / MISO from the BMP3xx to the controller.
I2C data line, also SPI serial data in / MOSI to the BMP3xx.
SPI chip-select input, pulled low to start an SPI transaction.
Interrupt output from the BMP3xx for data-ready signalling.
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.
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