See the demo here:

Most educational robots available today run on small computers which include raspberry pi, Jetson, and arduino which are amongst the most popular.

Some of the added functionalities we are going to look at are face recognition and conversational AI.

Install Virtualenvwrapper on Raspberry Pi Model 3, 4

Before we start any AI/ML projects on our raspberry pi, we have to setup the environments first.

It is best practice to always create virtual environments so that we leave our base environment untouched and use it for administrative purposes only.
Another reason is to avoid conflicts between the different applications. It is very common that applications use different versions of the same module, so to avoid these conflicts we use different environments.


We will be using virtualenvwrapper:

https://virtualenvwrapper.readthedocs.io/en/latest/

We will call Environment 1 – facrec (short for face recognition)
and
Environment 2 – cbot (short for chatbot)

virtualenvwrapper 5.0.1.dev2

First, some initialization steps. Most of this only needs to be done one time. You will want to add the command to source /usr/local/bin/virtualenvwrapper.sh to your shell startup file, changing the path to virtualenvwrapper.sh depending on where it was installed by pip or your package manager.

$ pip install virtualenvwrapper...
$ export WORKON_HOME=~/Envs
$ mkdir -p $WORKON_HOME
$ source /usr/local/bin/virtualenvwrapper.sh
$ mkvirtualenv facrec
Installing
setuptools.................................................................................................................................................................................done.
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/facrec/bin/predeactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/facrec/bin/postdeactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/facrec/bin/preactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/facrec/bin/postactivate  New python executable in facrec/bin/python
(facrec)$ ls $WORKON_HOME
facrec hook.log

Create another environment call it cbot

(facrec)$ ls $WORKON_HOME
facrec            hook.log
(facrec)$ mkvirtualenv cbot
Installing setuptools...............................
....................................................
....................................................
........... ...............................done.
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/cbot/bin/predeactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/cbot/bin/postdeactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/cbot/bin/preactivate
virtualenvwrapper.user_scripts Creating /Users/dhellmann/Envs/cbot/bin/postactivate  New python executable in cbot/bin/python
(env2)$ ls $WORKON_HOME    
facrec            cbot            hook.log

Switch between environments with workon:

(cbot)$ workon facrec
(facrec)$ echo $VIRTUAL_ENV
/Users/dhellmann/Envs/facrec
(facrec)$

List all of the environments:

lsvirtualenv [-b] [-l] [-h]


Show the details for a single virtualenv:

showvirtualenv [env]


Remove an environment, in the WORKON_HOME:

rmvirtualenv ENVNAME


You must use deactivate before removing the current environment.

(mynewenv)$ deactivate
$ rmvirtualenv mynewenv
$ workon
$

Switch from a virtual environment to the system-installed version of Python:

deactivate

The environments are located in :

cd ~/.virualenvs


Now we can start installing inside the environments :))

Setup Face Recognition on Raspberry Pi Model 3, 4 

 Now that our virtual environment is setup , let us move on to install the face recognition packages in virtual environment (facrec). 

 STEP 1 In (facrec) environment, install OpenCV. Here is a documented link: https://www.pyimagesearch.com/2019/09/16/install-opencv-4-on-raspberry-pi-4-and-raspbian-buster/...

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