bmp180 is a micropython module for the Bosch BMP180 sensor. It measures
temperature as well as pressure, with a high enough resolution to calculate
altitude.
Breakoutboard: http://www.adafruit.com/products/1603
data-sheet: http://ae-bst.resource.bosch.com/media/products/dokumente/bmp180/BST-BMP180-DS000-09.pdf
If you have any questions, open an issue.
| pyboard | bmp180 |
|---|---|
| VIN | VIN |
| 3V3 | 3Vo |
| GND | GND |
| SCL | SCL |
| SDA | SDA |
Example:
from bmp180 import *
from altimeter import altitude
bmp180 = BMP180()
bmp180.config(oversample=2)
bmp180.measure()
temp = bmp180.get_fixedp(TEMPERATURE)
p = bmp180.get_float(PRESSURE)
alt = altitude(p, 101325)BMP180
Module for the BMP180 pressure sensor.
config(i2c, oversample)
Configure the sensor.
measure()
Initiates a blocking measurement.
get_fixedp(VALUE)
Returns VALUE as int.
get_float(VALUE)
Returns VALUE as float.
chip_id
ID of chip is hardcoded on the sensor.
oversample_sett
Sets the accuracy. Default: 0
- 0 lowest accuracy, fastest
- 1
- 2
- 3 highest accuracy, slowest
altimeter
Provides a function to calculate altitude from pressure.
altitude(pressure, baseline)
Input in Pa.
Altitude in m.
Baseline is the pressure at Main Sea Level. The default is 101325 Pa, but you can use your local QNH in Pa.
To get different altitudes, use this as baselines:
| altitude | baseline |
|---|---|
| absolute | local pressure |
| true | QNH*100 |
| pressure | 101325 or None |