adafruit-circuitpython-mlx90640

Introduction

Driver for the MLX90640 thermal camera

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-mlx90640

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

sudo pip3 install adafruit-circuitpython-mlx90640

To install in a virtual environment in your current project:

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

Usage Example

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.

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

Contributing

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

Release files for adafruit-circuitpython-mlx90640 1.3.9

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for adafruit-circuitpython-mlx90640 1.3.9
File	Size	Uploaded
adafruit_circuitpython_mlx90640-1.3.9.tar.gz	31.5 kB	Apr 23, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for adafruit-circuitpython-mlx90640 1.3.9
File	Interpreter	ABI	Platform	Reset
adafruit_circuitpython_mlx90640-1.3.9-py3-none-any.whl 10.1 kB Apr 23, 2026	Python 3	none	any	Details

Total release size: 41.6 kB

Release files / adafruit_circuitpython_mlx90640-1.3.9.tar.gz

Download URL	adafruit_circuitpython_mlx90640-1.3.9.tar.gz
Size	31.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`1acfe6faadba54b8a4b21e9e77f75814d942b9da410641e413f7cb6adcbf1cb7`
BLAKE2b-256 checksum How to use checksums	`1b60e9d60bb5c44d3c2e6b67dd6f8eca25278a810852cd3aea85198efa4cf5cd`
Upload date	Apr 23, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.11.15`

Release files / adafruit_circuitpython_mlx90640-1.3.9-py3-none-any.whl

Download URL	adafruit_circuitpython_mlx90640-1.3.9-py3-none-any.whl
Size	10.1 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`aefb1da5e9e8e3e6bc2eec30427f01ab20358f425701aa3f001066f1d4324f04`
BLAKE2b-256 checksum How to use checksums	`20f69025f6c744d4e4fa881a50bbd71d93566bc6aee43656bff5962a9582af20`
Upload date	Apr 23, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.11.15`