* To install 'pwm_handler' on STM32 board, connect uUSB cable to CN5 connector of board and copy the folowing files in 'PYBFLASH' directory:
- upython/config.json
- upython/boot.py
- upython/config.json
- upython/pwm_handler.py
- ../common_class/serial_com.py
- ../common_class/vnh5019.py

* To install client, put the file "pwm_client" located in "client" directory where you want to use it.
To use client, you need pyserial and tkinter package installed:
$ python3 -m pip install --user pyserial
$ sudo apt install python3-tk