This is a simple service to communicate with cheap USB WatchDog timers that create a USB-HID device:
Please use with caution as it's not well tested!
Create your VirtualEnv, activate it.
$ pip install -r requirements.txt
You will need to install a library on your operating system to interface with the USB-HID device:
apt install libhidapi-hidraw0
Alternatively you may be able to use "libhidapi-libusb0" but I didn't have any success with this.
Same as for Ubuntu, except for last step
yum install hidapi