While the entire world is fighting Covid-19, everybody is struggling to work from home in one or the other way. Especially families who are handling their kids/babies along with their hectic jobs. This scenario inspired me to find a way to monitor our Babies/toddlers when we are busy working or handling calls from home.

Baby-Vibes uses Image classification to identify crying baby and pass a Voice command to Google Home to play their favorite cartoon for e.g. Tom and Jerry in this case, while we excuse us from every one and come to their rescue. You can also refer to my detailed Blog Article on Medium - Quick setup instructions for installing PyTorch and fastai on Raspberry Pi 4

• Raspberry Pi 4

  • In order to check if the given wheel file (or any wheel file for Raspberry Pi for a specific Python package) is compatible with your RPi’s processor architecture, type in the following:

    uname -a

  • If you get the compatible version of processor architecture in terminal as armv7l, continue with the installation.

• Python 3.7

python3 -m virtualenv env
source env/bin/activate 

sudo apt install libopenblas-dev libblas-dev m4 cmake cython python3-dev python3-yaml python3-setuptools python3-wheel python3-pillow python3-numpy 

Download torch-1.3 and torchvision-0.4 wheel files.

pip3 install torch-1.3.0a0+deadc27-cp37-cp37m-linux_armv7l.whl
pip3 install torchvision-0.4.0a0+d31eafa-cp37-cp37m-linux_armv7l.whl
pip3 install fastai --no-deps 

It is possible that after installation when trying to import torch the following error may occur:

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/usr/lib/python3.6/site-packages/torch/__init__.py", line 45, in <module>
     from torch._C import *
ModuleNotFoundError: No module named 'torch._C' 

Please refer this for understanding the fix.

Your path may look like this if your are following along using the same project_folder and env variables:

$ cd pi/home/env/lib/python3.7/site-packages/torch

Inside this folder you will find two files with names like this:

_CXXXXXXXX.so
_dlXXXXXXXX.so
(XXXXXXX represents just any name)

Rename these files to below format:

_C.so
_dl.so

To test if everything was installed correctly, log into your python terminal and run the commands:

$ python3.7

>>> import torch
>>> import torchvision
>>> import fastai

Now you are ready to install project specific requirements -

pip3 install -r requirements.txt 

Finally, Run flask app:

python3 app.py