ARCS - Arduino Razzberry Cushion Simulator

// Include Libraries
#include "Arduino.h"
#include "SFE_BMP180.h"
#include "PiezoSpeaker.h"

// Pin Definitions
#define PIEZOSPEAKER_PIN_SIG  5

// Global variables and defines
unsigned int piezoSpeakerWhoopeeLength          = 12; // amount of notes in melody
unsigned int piezoSpeakerWhoopeeMelody[]        = {NOTE_C7, NOTE_E7, NOTE_G7, NOTE_C7, NOTE_G7, NOTE_C8, NOTE_C7, NOTE_E7, NOTE_G7, NOTE_C7, NOTE_G7, NOTE_C8}; // list of notes. List length must match WhoopeeLength!
unsigned int piezoSpeakerWhoopeeNoteDurations[] = {800    , 800    , 800    , 400    , 800    , 400    , 800    , 800    , 800    , 400    , 800    , 400}; // note durations; 4 = quarter note, 8 = eighth note, etc. List length must match WhoopeeLength!

// Constructors
SFE_BMP180 bmp180;
PiezoSpeaker piezoSpeaker(PIEZOSPEAKER_PIN_SIG);

// define vars for pressure reading and trigger
#define PRESSURE_SENSITIVITY 5 // define pressure increment value to trigger sound (mb)
double previousBmp180Pressure = 10000;

/* This code sets up the essentials for your circuit to work. It runs first every time your circuit is powered with electricity. */
void setup() {
  // Setup Serial which is useful for debugging
  Serial.begin(9600);
  Serial.println("start");

  //Initialize I2C device
  bmp180.begin();
}

/* This code is the main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop. */
void loop() {
  // BMP180
  // Read pressure from barometric sensor
  double bmp180Pressure = bmp180.getPressure();
  Serial.print(F("Pressure: ")); Serial.print(bmp180Pressure, 1); Serial.print(F(" [hPa]"));
  Serial.print(F("\tprevious reading: ")); Serial.print(previousBmp180Pressure, 1); Serial.print(F(" [hPa]"));

  // Determine pressure change to previous reading
  double bmp180PressureChange = bmp180Pressure - previousBmp180Pressure;
  Serial.print(F("\tchange: ")); Serial.print(bmp180PressureChange, 1); Serial.println(F(" [hPa]"));
  previousBmp180Pressure = bmp180Pressure;

  // If pressure has been increased by more then PRESSURE_SENSITIVITY hPa ...
  if ( bmp180PressureChange >= PRESSURE_SENSITIVITY ) {
    Serial.println(F(">>>>> Whoopee!!!"));
    // The PiezoSpeaker will play the Whoopee tune
    piezoSpeaker.playMelody(piezoSpeakerWhoopeeLength, piezoSpeakerWhoopeeMelody, piezoSpeakerWhoopeeNoteDurations);
  }

  delay(500);
}

/*******************************************************

     Circuito.io is an automatic generator of schematics and code for off
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     Copyright (C) 2016 Roboplan Technologies Ltd.

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