adafruit-circuitpython-mlx90640

Introduction

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Driver for the MLX90640 thermal camera

Dependencies

This driver depends on:

• Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_
• Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>_
• Register <https://github.com/adafruit/Adafruit_CircuitPython_Register>_

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle <https://circuitpython.org/libraries>_.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/adafruit-circuitpython-mlx90640/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-mlx90640

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

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-mlx90640

To install in a virtual environment in your current project:

.. code-block:: shell

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-mlx90640

Usage Example

.. code-block:: python

import time
import board
import busio
import adafruit_mlx90640

i2c = busio.I2C(board.SCL, board.SDA, frequency=800000)

mlx = adafruit_mlx90640.MLX90640(i2c)
print("MLX addr detected on I2C", [hex(i) for i in mlx.serial_number])

    # if using higher refresh rates yields a 'too many retries' exception,
    # try decreasing this value to work with certain pi/camera combinations
mlx.refresh_rate = adafruit_mlx90640.RefreshRate.REFRESH_2_HZ

frame = [0] * 768
while True:
    try:
	mlx.getFrame(frame)
    except ValueError:
	# these happen, no biggie - retry
	continue

    for h in range(24):
	for w in range(32):
	    t = frame[h*32 + w]
	    print("%0.1f, " % t, end="")
            print()
        print()

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/mlx90640/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_MLX90640/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.