/**
   Mini piano for Arduino.

   You can control the colorful buttons with your keyboard:
   After starting the simulation, click anywhere in the diagram to focus it.
   Then press any key between 1 and 8 to play the piano (1 is the lowest note,
   8 is the highest).

   Copyright (C) 2021, Uri Shaked. Released under the MIT License.
**/
#include "pitches.h"  // Include pitch definitions for musical notes

// Pin assignments for piezo sensors
const int piezoPins[] = { A0, A1, A2, A3, A4, A5, A6 }; // 7 analog pins for piezo sensors
const int numKeys = sizeof(piezoPins) / sizeof(piezoPins[0]);

// Corresponding musical tones for each key
const int pianoTones[] = {
  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4
};

// Speaker pin for audio output
#define SPEAKER_PIN 8

// Threshold for impact detection
const int impactThreshold = 10;  // Adjust this value as needed based on sensor response

void setup() {
  Serial.begin(9600);  // Start serial communication for debugging

  // Set piezo pins as input
  for (int i = 0; i < numKeys; i++) {
    pinMode(piezoPins[i], INPUT);
  }
  pinMode(SPEAKER_PIN, OUTPUT);

  Serial.println("Floor Piano Ready: Step on the sensors to play notes!");
}

void loop() {
  for (int i = 0; i < numKeys; i++) {
    int sensorValue = analogRead(piezoPins[i]);// checks presses on each key

    if (sensorValue > impactThreshold) { // Check if the impact exceeds the threshold
      tone(SPEAKER_PIN, pianoTones[i]);  // Play the corresponding tone
      Serial.print("Key ");
      Serial.print(i + 1);
      Serial.print(" activated with value: ");
      Serial.println(sensorValue);
      delay(300);  // Duration of note
      noTone(SPEAKER_PIN);
    }
  }
  int potValue = analogRead(A0);  // Read the potentiometer value
  float voltage = potValue * (5.0 / 1023.0);  // Convert to voltage
  Serial.print("Potentiometer Voltage: ");
  Serial.println(potValue);
  delay(1000);
}