I2C_Analog_Data_Receiver.ino

/*
  I2C Slave Control Demo
  It will receive the data from I2C Communication
  https://github.com/UttamBasu
*/

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

// Define Slave I2C Address
#define SLAVE_ADDR 9

// Define LED Pin
int LED = 13;

// Variable for received data
int rd;

// Variable for blink rate
int br;

void setup()
{
  pinMode(LED, OUTPUT);

  // Initialize I2C communications as Slave
  Wire.begin(SLAVE_ADDR);

  // Function to run when data received from master
  Wire.onReceive(receiveEvent);

  // Setup Serial Monitor
  Serial.begin(9600);
  Serial.println("I2C Slave Demonstration");
}

void receiveEvent()
{
  // read one character from the I2C
  rd = Wire.read();
  // Print value of incoming data
  Serial.println(rd);
}

void loop()
{
  delay(50);

  // Calculate blink value
  br = map(rd, 1, 255, 100, 2000);

  digitalWrite(LED, HIGH);
  delay(br);
  digitalWrite(LED, LOW);
  delay(br);
}