dabeku / Camera-mlx90640-overlay

Camera mlx90640 overlay

Based on the amazing work of https://github.com/obstruse/ThermalCamera

The only difference is it works with 64 bit Raspberry Pi OS since it uses picamera2 instead of pygame.camera

• Connect to GPIO pins

• Enable I2C via raspi-config or Preferences - Raspberry Pi Configuration - Interfaces - I2C

i2cdetect -y -r 1

should result in

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- 33 -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

pip install adafruit-circuitpython-mlx90640
pip install pygame
pip install opencv-python
pip install picamera2
pip install -U numpy
pip install colour

Assure to use latest version of numpy

sudo apt-get install libatlas-base-dev

Start the script

python3 heat.py

Working configuration

• Raspberry Pi 4
• MLX90640 (via GPIO pins)
• Official RPi display (via DSI)
• Official camera module v1.3 (via CSI)
• Evatronic PD Pioneer 20000mAh
  • USB C: RPi
  • Micro-USB: Display

Attention to /boot/config.txt and reboot after making changes

• Add: dtparam=i2c1_baudrate=400000
• Set: camera_auto_detect = 0
• Set: dtoverlay=ov5647
• Keep dtoverlay=vc4-kms-v3d enabled
• Keep max_framebuffers=2 enabled

See also: https://www.raspberrypi.com/documentation/computers/camera_software.html