DACERI

Python Env Setup

On Raspberry PI, after cloning this repo, setup a Python virtual environment at the root.

$ python -m venv .venv # setup a Python virtual environment whose name is ".venv". Use `ls -a` to find the .venv repo
$ source .venv/bin/activate  # activate the virtual environment

## Virtual environment .venv
 (.venv)$ pip install -r requirements.txt # install the packages

## Clone the repository
  git clone --recurse-submodules https://github.com/cissieAB/CamStream.git

Theraml Camera and IMX477 (HD Camera) Setup

Thermal camera

Once you have all the Python dependency ready, follow the below steps to set up the thermal camera.

1. Update the system config file at /boot/firmware/config.txt.

   $ sudo nano /boot/firmware/config.txt
   
   ## Find the line with dtparam_arm = on and update it to:
   dtparam_arm = on, arm_baudrate = 400000

   Confirm the camera is connected with command sudo i2cdetect -y 1. You should see a matrix with number "33" as this picture shows.

2. Make sure the basic Python package adafruit_mlx90640 is working with detect_thermalcam.py.

   (.venv)$ python scripts/detect_thermalcam.py

   You should be able to see the raw temperature array printed out on the screen.

3. Tricks to make the submodule PiThermalCam working.

   A. Find the Python dependency files at <.venv path>/lib/python3.11/site-packages/.

   • Update cmapy.py:
     • Replace matplotlib.cm.get_cmap() with matplotlib.pyplot.get_cmap();
     • At the top of the file, add import matplotlib.pyplot.
   • [Optional] Update adafruit_mlx90640.py:
     • Line 160: Replace if cnt > 4 to if cnt > 400.

   B. Run the camera test to check if there is any error.

   (.venv)$ python PiThermalCam/examples/cam_test.py

IMX477 HD Camera

Follow the guide to update the system configuration file and test with libcamera.

As the system config file /boot/firmware/config.txt is updated twice, we save a backup copy in this repo.