Google Coral's USB Accelerator (https://coral.ai/docs/accelerator/get-started) currently doesn't work on the Raspberry Pi OS Bookworm. In order to get the USB Accelerator to work we need to do a few extra things like install Python 3.9 and create a python virtual environment.

Install dependencies

sudo apt-get install -y build-essential tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev libffi-dev

Build Python from scratch

wget https://www.python.org/ftp/python/3.9.18/Python-3.9.18.tar.xz
tar xf Python-3.9.18.tar.xz
cd Python-3.9.18
./configure --enable-optimizations 
sudo make altinstall

Make a virtual environment

Python-3.9.18/python -m venv --system-site-packages tf

Next we can install Pycoral

echo "deb https://packages.cloud.google.com/apt coral-edgetpu-stable main" | sudo tee /etc/apt/sources.list.d/coral-edgetpu.list
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
sudo apt-get update
sudo apt-get install libedgetpu1-std -y
sudo usermod -aG plugdev

sudo ./tf/bin/pip3 install --extra-index-url https://google-coral.github.io/py-repo/ pycoral

Install any extra python libraries

sudo ./tf/bin/pip3 install opencv-python

sudo apt install libcap-dev libcamera-dev 

sudo ./tf/bin/pip3 install rpi-libcamera

sudo ./tf/bin/pip3 install rpi-kms

sudo ./tf/bin/pip3 install picamera2

Note: rpi-libcamera and rpi-kms may need to be updated if your system package is updated.

As of 2/21/2024, If your are installing rpi-libcamera 0.1a2 and have updated to libcamera0.2, you will need to run the following:

cd /usr/lib/aarch64-linux-gnu

sudo ln -s /usr/lib/aarch64-linux-gnu/libcamera-base.so.0.2.0 libcamera-base.so.0.1

sudo ln -s /usr/lib/aarch64-linux-gnu/libcamera.so.0.2.0 libcamera.so.0.1

Run the python virtual environment

source ./tf/bin/activate

At this point you should be able to use the USB Accelerator against the pycoral repo: https://github.com/google-coral/pycoral.git