Gammon Forum : Electronics : Microprocessors : I2C - Two-Wire Peripheral Interface - for Arduino
What are the hardware requirements for connecting two Arduinos so that they can communicate via a single TX/RX pair? - Quora
Can't get I2C LCD to work, I2C scanner says „no I2C devices found“. : r/ arduino
Guide for I2C OLED Display with Arduino
Why the Arduino Won and Why It's Here to Stay - Make
I2C 20x4 LCD not working on Mega - Displays - Arduino Forum
Arduino MEGA Multiple SCL and SDA pins needed - Project Guidance - Arduino Forum
Plugging in I2C display directly into arduino UNO R3 Wifi ATMega + ESP8266 clone board pins - Displays - Arduino Forum
Inter-Integrated Circuit (I2C) Protocol
Arduino Mega 2560 is designed for your most ambitious projects which require additional pins and extra memory Based on the 8-bit AVR microcontroller
Arduino Mega 2560 REV3 [A000067]
wire.h how to write/read on 2scl, 2sda on mega r3 - Programming Questions - Arduino Forum