Transmit single character (incrementing value) from Master Arduino to Slave Arduino over I2C.
Includes: Serial print for monitoring, and onboard LED indicator on Slave device.
Requires: 2 Arduinos, 3 jumper wires, and no external circuitry. Uses Library <Wire.h>
Wire between Arduinos as described. Load: I2C Master on one arduino Load: I2C Slave on a separate arduino Open Serial Monitor (I2C Slave to watch RXd data) and verify communication.