https://github.com/dafvid/micropython-bmp280

module for the BMP280 sensor
https://github.com/dafvid/micropython-bmp280

bmp280 esp8266 micropython

Last synced: 3 months ago
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module for the BMP280 sensor

• Host: GitHub
• URL: https://github.com/dafvid/micropython-bmp280
• Owner: dafvid
• License: mit
• Created: 2018-05-02T15:24:24.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2023-11-18T16:21:09.000Z (12 months ago)
• Last Synced: 2024-04-30T06:32:19.068Z (6 months ago)
• Topics: bmp280, esp8266, micropython
• Language: Python
• Size: 38.1 KB
• Stars: 81
• Watchers: 5
• Forks: 24
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-micropython - micropython-bmp280 - Module for the BMP280 sensor. (Libraries / Sensors)

README

        
# micropython-bmp280

 - https://www.adafruit.com/product/2651

 - https://www.bosch-sensortec.com/products/environmental-sensors/pressure-sensors/pressure-sensors-bmp280-1.html

 - https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf

Inspired by  

https://github.com/vitally/BMP280  

https://github.com/micropython-IMU/micropython-bmp180

## Constructor

**BMP280(i2c_bus, addr=0x76, use_case=BMP280_CASE_HANDHELD_DYN)**

* *i2c_bus* - the I2C bus to use

* *addr* - I2C address of the BMP280 (always the same)

* *use_case* - Use case to start the BMP280 with. Set to None to disable measuring on boot.

## Enums

Values for different settings are defined in the following constants. Reference to manual section in parenthesis.

### Use cases (See 3.4, 3.8.2)

* BMP280_CASE_HANDHELD_LOW

* BMP280_CASE_HANDHELD_DYN (*default*)

* BMP280_CASE_WEATHER

* BMP280_CASE_FLOOR

* BMP280_CASE_DROP

* BMP280_CASE_INDOOR

### Oversampling setting (See 3.3.1, 3.8.2)

* BMP280_OS_ULTRALOW

* BMP280_OS_LOW

* BMP280_OS_STANDARD

* BMP280_OS_HIGH

* BMP280_OS_ULTRAHIGH

### Pressure oversampling (See 3.3.1)

* BMP280_PRES_OS_SKIP

* BMP280_PRES_OS_1

* BMP280_PRES_OS_2

* BMP280_PRES_OS_4

* BMP280_PRES_OS_8

* BMP280_PRES_OS_16

### Temperature oversampling (See 3.3.2)

* BMP280_TEMP_OS_SKIP

* BMP280_TEMP_OS_1

* BMP280_TEMP_OS_2

* BMP280_TEMP_OS_4

* BMP280_TEMP_OS_8

* BMP280_TEMP_OS_16

### IIR filter (See 3.3.3)

* BMP280_IIR_FILTER_OFF

* BMP280_IIR_FILTER_2

* BMP280_IIR_FILTER_4

* BMP280_IIR_FILTER_8

* BMP280_IIR_FILTER_16

### Standby settings for Normal measure (See 3.6.3)

* BMP280_STANDBY_0_5

* BMP280_STANDBY_62_5

* BMP280_STANDBY_125

* BMP280_STANDBY_250

* BMP280_STANDBY_500

* BMP280_STANDBY_1000

* BMP280_STANDBY_2000

* BMP280_STANDBY_4000

### Power modes

* BMP280_POWER_SLEEP

* BMP280_POWER_FORCED

* BMP280_POWER_NORMAL

### SPI 3-wire select

* BMP280_SPI3W_ON

* BMP280_SPI3W_OFF

## Example

```python

from machine import I2C

from bmp280 import *

bus = I2C()

bmp = BMP280(bus)

bmp.use_case(BMP280_CASE_WEATHER)

bmp.oversample(BMP280_OS_HIGH)

bmp.temp_os = BMP280_TEMP_OS_8

bmp.press_os = BMP280_PRES_OS_4

bmp.standby = BMP280_STANDBY_250

bmp.iir = BMP280_IIR_FILTER_2

bmp.spi3w = BMP280_SPI3W_ON

bmp.power_mode = BMP280_POWER_FORCED

# or 

bmp.force_measure()

bmp.power_mode = BMP280_POWER_NORMAL

# or 

bmp.normal_measure()

# also

bmp.in_normal_mode()

bmp.power_mode = BMP280_POWER_SLEEP

# or 

bmp.sleep()

print(bmp.temperature)

print(bmp.pressure)

#True while measuring

bmp.is_measuring

#True while copying data to registers

bmp.is_updating

```

## TODO

* SPI support

* ~~Filters~~

* ~~Oversampling settings (half done)~~

* ~~Power modes~~

* ~~Standby setting for Normal mode~~