CircuitPython BMP581 Driver¶

bmp581¶

CircuitPython Driver for the Bosch BMP581 pressure sensor

• Author(s): Jose D. Montoya

class bmp581.BMP581(i2c_bus: busio.I2C, address: int = 0x47)[source]¶

Driver for the BMP581 Sensor connected over I2C.

Parameters:¶

i2c_bus : I2C¶

The I2C bus the BMP581 is connected to.

address : int¶

The I2C device address. Defaults to 0x47

Raises:¶

RuntimeError – if the sensor is not found

Quickstart: Importing and using the device

Here is an example of using the BMP581 class. First you will need to import the libraries to use the sensor

import board
import bmp581

Once this is done you can define your board.I2C object and define your sensor object

i2c = board.I2C()  # uses board.SCL and board.SDA
bmp = bmp581.BMP581(i2c)

Now you have access to the attributes

press = bmp.pressure

property altitude¶

With the measured pressure p and the pressure at sea level p0 e.g. 1013.25hPa, the altitude in meters can be calculated with the international barometric formula

With the measured pressure p and the absolute altitude the pressure at sea level can be calculated too. See the altitude setter for this calculation

property output_data_rate : int¶

Sensor output_data_rate. for a complete list of values please see the datasheet

property power_mode : str¶

Sensor power_mode

Mode	Value
bmp581.STANDBY	0x00
bmp581.NORMAL	0x01
bmp581.FORCED	0x02
bmp581.NON_STOP	0X03

property pressure : float¶

The sensor pressure in kPa :return: Pressure in kPa

property pressure_oversample_rate : str¶

Sensor pressure_oversample_rate

Mode	Value
bmp581.OSR1	0x00
bmp581.OSR2	0x01
bmp581.OSR4	0x02
bmp581.OSR8	0x03
bmp581.OSR16	0x04
bmp581.OSR32	0x05
bmp581.OSR64	0x06
bmp581.OSR128	0x07

property temperature : float¶

The temperature sensor in C :return: Temperature

property temperature_oversample_rate : str¶

Sensor temperature_oversample_rate

Mode	Value
bmp581.OSR1	0x00
bmp581.OSR2	0x01
bmp581.OSR4	0x02
bmp581.OSR8	0x03
bmp581.OSR16	0x04
bmp581.OSR32	0x05
bmp581.OSR64	0x06
bmp581.OSR128	0x07