// Archived example from my Week 11 page. Physical verification is pending.
#include <Wire.h>
#define LED_PIN D1
#define MY_ADDRESS 0x08

void setup() {
  pinMode(LED_PIN, OUTPUT);
  Wire.begin(MY_ADDRESS);    // join the bus with my address
  Wire.onReceive(onMessage);
}

void onMessage(int howMany) {
  byte msg = Wire.read();
  digitalWrite(LED_PIN, msg);  // 1 turns the LED on, 0 off
}

void loop() {}