I2C_Analog_Data_Transmitter.ino

/*
  I2C Master Control Demo
  https://github.com/UttamBasu
*/

// Include Arduino Wire library for I2C
#include <Wire.h>

// Define Slave I2C Address
#define SLAVE_ADDR 9

// Analog pin for potentiometer
int analogPin = 0;
// Integer to hold potentiometer value
int val = 0;

void setup()
{
  // Initialize I2C communications as Master
  Wire.begin();
}

void loop()
{
  delay(50);

  // Read pot value
  // Map to range of 1-255 for flash rate
  val = map(analogRead(analogPin), 0, 1023, 255, 1);

  // Write a charatre to the Slave
  Wire.beginTransmission(SLAVE_ADDR);
  Wire.write(val);
  Wire.endTransmission();
}