Library for LCD I2C Backpack Supports 16x2 and 20x4 screens. Raspberry Pi 2
Hardware:
LCD 16x2
LCD1602 serial monitor ( PCF )
http://g03.a.alicdn.com/kf/HTB1rgngKFXXXXbXXFXXq6xXFXXXU/1Pcs-IIC-I2C-Serial-Interface-Board-Module-LCD1602-LCD2004-Display-for-Arduino-Hot-Worldwide.jpg_640x640.jpg
Raspberry Pi 2
How to use:
https://youtu.be/i5A5AsDRRwQ
Run
sudo python lcd.py