Regular installation via PIP

Pip command for Linux:

pip install EasyMCP2221

Pip command for Windows:

py -m pip install EasyMCP2221


EasyMCP2221 depends on hidapi, which in fact needs some backend depending on OS. Sometimes this is troublesome.

If you get an error like this:

ImportError: Unable to load any of the following libhidapi.dylib hidapi.dll libhidapi-0.dll

Try to install the following packages using pip:

  • libusb

  • libusb1

If that doesn’t work, try manually installing libhidapi from

Sometimes, yo need to manually copy libusb-1.0.dll to C:\Windows\System32. It used to be in C:\Users\[username]\AppData\Local\Programs\Python\Python39\Lib\site-packages\libusb\_platform\_windows\x64\libusb-1.0.dll or similar path.

If the library loads but it does not find your device, try using any of the Microchip’s official tools to verify that everything is working fine.

Editable for testing

You may want to install this library from a cloned GitHub repository, usually for testing or development purposes.

First create and activate a new virtual environment. Update pip if needed.

> python -m venv init easymcp_dev
> cd easymcp_dev
> Scripts\activate
> python -m pip install --upgrade pip

Then, clone the home repository inside that virtual environment and perform the installation in editable (-e) mode.

> git clone
Cloning into 'EasyMCP2221'...

> pip install -e EasyMCP2221
Obtaining file:///D:/tmp/easymcp_dev/EasyMCP2221
  Installing build dependencies ... done
Successfully installed EasyMCP2221-0.0+unreleased.local

If you get this error: “File “” not found. Directory cannot be installed in editable mode”, update PIP.

> python -m pip install --upgrade pip

If you get this one: “EasyMCP2221 does not appear to be a Python project: neither ‘’ nor ‘pyproject.toml’ found.”, please check working directory. You must be in the root of the cloned GitHub repository.

Local documentation

This is an optional step. To compile documentation locally you will need sphinx and RTD theme.

pip install -U sphinx
pip install -U sphinx_rtd_theme


cd docs
make html

Main HTML file is EasyMCP2221/docs/build/html/index.html.