Fermion: BMP581 High-Precision Barometric Pressure Sensor (Bosch Flagship | ±0.3hPa | 3.3V)

The Fermion: BMP581 is a compact digital barometric pressure and temperature sensor module based on the Bosch BMP581 chip. It delivers an absolute accuracy of ±0.3 hPa and features ultra-low noise (< 0.1 Pa) and power consumption (2μA sleep current).

3V3Official table 4 row 1
Power Positive (Supply Input: 3.3V)
Type · power
GNDOfficial table 4 row 2
Power Negative (Ground)
Type · ground
SCL/SCKOfficial table 4 row 3
Multiplexed Pin: Clock Line (SCL) in I2C mode, Clock Line (SCK) in SPI mode
Type · i2c
SDA/SDIOfficial table 4 row 4
Multiplexed Pin: Data Line (SDA) in I2C mode, Data Input Line (SDI) in SPI mode
Type · i2c
CSBOfficial table 4 row 5
Active exclusively in SPI mode, functioning as Chip Select Pin

Start wiring

I2C · SPI

Confirm the data interface matches your host board.

Module pins: 3V3, SDO, GND, SCL/SCK, SDA/SDI, CSB. Schematik maps them to your board in the app.

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4 groups

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Pin	Position	Type	Function
3V3	Official table 4 row 1	power	Power Positive (Supply Input: 3.3V)
GND	Official table 4 row 2	ground	Power Negative (Ground)
SCL/SCK	Official table 4 row 3	i2c	Multiplexed Pin: Clock Line (SCL) in I2C mode, Clock Line (SCK) in SPI mode
SDA/SDI	Official table 4 row 4	i2c	Multiplexed Pin: Data Line (SDA) in I2C mode, Data Input Line (SDI) in SPI mode
CSB	Official table 4 row 5	spi	Active exclusively in SPI mode, functioning as Chip Select Pin
SDO	Official table 4 row 6	power	Active exclusively in SPI mode, serving as Data Output Line
INT	Official table 4 row 7	digital io	Interrupt Output Pin (General-Purpose)

Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour