History

Phil Howard 218d8ea929 Add documentation and features to BMx280 modules		2021-08-02 14:21:00 +01:00
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README.md	Add documentation and features to BMx280 modules	2021-08-02 14:21:00 +01:00
breakout_bmp280.c	Add documentation and features to BMx280 modules	2021-08-02 14:21:00 +01:00
breakout_bmp280.cpp	Add documentation and features to BMx280 modules	2021-08-02 14:21:00 +01:00
breakout_bmp280.h	Add documentation and features to BMx280 modules	2021-08-02 14:21:00 +01:00
micropython.cmake	Add MicroPython bindings for BME280 and BMP280	2021-08-02 14:20:59 +01:00
micropython.mk	Add MicroPython bindings for BME280 and BMP280	2021-08-02 14:20:59 +01:00

README.md

BMP280

Getting Started
Reading Temperature & Pressure
Configuring The Sensor

Getting Started

Construct new PimoroniI2C and BreakoutBMP280 instances:

from breakout_bmp280 import BreakoutBMP280
from pimoroni_i2c import PimoroniI2C

PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}

i2c = PimoroniI2C(**PINS_BREAKOUT_GARDEN)
bmp = BreakoutBMP280(i2c)

Reading Temperature & Pressure

The read method will return a tuple containing Temperature (degrees C) and Pressure (Pa) values:

temperature, pressure = bmp.read()

Configuring The Sensor

The configure method allows you to set up the oversampling, filtering and operation mode.

bmp.configure(filter, standby_time, os_pressure, os_temp, mode)

The breakout_bmp280 module includes constants for these:

Filter Settings

FILTER_COEFF_OFF
FILTER_COEFF_2
FILTER_COEFF_4
FILTER_COEFF_8
FILTER_COEFF_16

Oversampling Settings

NO_OVERSAMPLING
OVERSAMPLING_1X
OVERSAMPLING_2X
OVERSAMPLING_4X
OVERSAMPLING_8X
OVERSAMPLING_16X

Mode Settings

SLEEP_MODE
FORCED_MODE
NORMAL_MODE

Standby/Output Data Rate Settings

STANDBY_TIME_0_5_MS
STANDBY_TIME_62_5_MS
STANDBY_TIME_125_MS
STANDBY_TIME_250_MS
STANDBY_TIME_500_MS
STANDBY_TIME_1000_MS
STANDBY_TIME_2000_MS
STANDBY_TIME_4000_MS

Defaults

bmp.configure(FILTER_COEFF_2, STANDBY_TIME_1000_MS, OVERSAMPLING_4X, OVERSAMPLING_4X)