This is a ROS-noetic driver package for the MLX90640 sensor tested on Raspberry Pi4.
Download the debian package from the Releases page.
sudo apt-get install ros-noetic-mlx90640_thermal_camera_1.0.0-0focal_arm64.deb
NOTE:
Install the amd64 package if you are using an x86_64 machine.
sudo su -
roslaunch mlx90640_thermal_camera thermal_camera.launch
NOTE:
You need to be the root user to access the I2C device.