I2C Protocol (2-Wire Interface) in a nut shell - EmbedJournal
I2C - SparkFun Learn
Amazon.com: GeeekPi IIC I2C TWI Serial LCD 2004 20x4 Display Module with I2C Interface Adapter Blue Backlight for Raspberry Pi Arduino STM32 DIY Maker Project BPI Tinker Board Electrical IoT Internet of
I2C connection to LCD screen (PIC18F4553 / PCF8574)
USB to I2C Click
I2C - SparkFun Learn
I²C or I2C - Inter-Integrated Circuit - Working Explanation