No module named PIL

$ pip install image

References :
python - No module named serial - Stack Overflow 

Turning off usb

power off

# echo "1-4.4.4" > /sys/bus/usb/drivers/usb/unbind

power on

# echo "1-4.4.4" > /sys/bus/usb/drivers/usb/bind

References :
Controlling a USB power supply (on/off) with linux - Stack Overflow 

Node-RED dashboard

$ cd ~/.node-red
$ npm i node-red-dashboard

http://localhost:1880/ui

References :

node-red/node-red-dashboard: A dashboard UI for Node-RED