Introduction

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CircuitPython library to support Honeywell MPRLS digital pressure sensors.

Dependencies

This driver depends on:

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-mprls

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-mprls

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-mprls

Usage Example

import time
import board
import busio
import adafruit_mprls

i2c = busio.I2C(board.SCL, board.SDA)

# Simplest use, connect to default over I2C
mpr = adafruit_mprls.MPRLS(i2c, psi_min=0, psi_max=25)


while True:
    print((mpr.pressure,))
    time.sleep(1)

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

Documentation

For information on building library documentation, please check out this guide.

Table of Contents

Simple test

Ensure your device works with this simple test.

examples/mprls_simpletest.py
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# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import time
import board
import busio
import adafruit_mprls

i2c = busio.I2C(board.SCL, board.SDA)

# Simplest use, connect to default over I2C
mpr = adafruit_mprls.MPRLS(i2c, psi_min=0, psi_max=25)

# You can also specify both reset and eoc pins
"""
import digitalio
reset = digitalio.DigitalInOut(board.D5)
eoc = digitalio.DigitalInOut(board.D6)
mpr = adafruit_mprls.MPRLS(i2c, eoc_pin=eoc, reset_pin=reset,
                           psi_min=0, psi_max=25)
"""

while True:
    print((mpr.pressure,))
    time.sleep(1)

adafruit_mprls

CircuitPython library to support Honeywell MPRLS digital pressure sensors

  • Author(s): ladyada

Implementation Notes

Hardware:

Software and Dependencies:

class adafruit_mprls.MPRLS(i2c_bus, *, addr=24, reset_pin=None, eoc_pin=None, psi_min=0, psi_max=25)

Driver base for the MPRLS pressure sensor :param i2c_bus: The busio.I2C object to use. This is the only required parameter. :param int addr: The optional I2C address, defaults to 0x18 :param microcontroller.Pin reset_pin: Optional digitalio pin for hardware resetting :param microcontroller.Pin eoc_pin: Optional digitalio pin for getting End Of Conversion signal :param float psi_min: The minimum pressure in PSI, defaults to 0 :param float psi_max: The maximum pressure in PSI, defaults to 25

pressure

The measured pressure, in hPa

Indices and tables