lps22h — LPS22HB/HH pressure sensor

Driver for the ST LPS22HB / LPS22HH MEMS nano pressure sensor over I2C. The device exposes both barometric pressure and a die temperature reading, and can run either continuously or in single-shot (“one-shot”) mode where each measurement is triggered explicitly by the host.

Example:

import time
from machine import Pin, I2C
from lps22h import LPS22H

bus = I2C(1, scl=Pin(15), sda=Pin(14))
lps = LPS22H(bus, oneshot=False)

while True:
    print("Pressure: %.2f hPa  Temperature: %.2f C" %
          (lps.pressure(), lps.temperature()))
    time.sleep_ms(10)

Classes

class lps22h.LPS22H(bus: machine.I2C, address: int = 0x5C, oneshot: bool = False)

Construct an LPS22H instance and configure the device with BDU enabled and the low-pass filter active.

bus

A configured machine.I2C bus the sensor is attached to.

address

7-bit I2C address of the device. Defaults to 0x5C; some boards strap the SDO pin high which selects 0x5D.

oneshot

If True, the device starts in one-shot mode and each call to pressure() or temperature() triggers a fresh conversion and waits for it to finish. If False, the ODR is set to 1 Hz and readings return the most recent continuous sample.

set_oneshot_mode(oneshot: bool) → None

Switch the device between continuous and one-shot acquisition modes at runtime. Updates the ODR field of CTRL_REG1 accordingly.

pressure() → float

Return the absolute atmospheric pressure in hectopascals (hPa). In one-shot mode this triggers a new conversion and blocks until the pressure data-ready flag is set.

temperature() → float

Return the die temperature in degrees Celsius. In one-shot mode this triggers a new conversion and blocks until the temperature data-ready flag is set.

altitude() → float

Return an estimated altitude in metres derived from the current pressure and temperature readings using the international barometric formula referenced to a sea-level pressure of 1013.25 hPa.