dznet

import string
import random


def generate(length=35, digits_count=5, upper_count=5, special_count=5):
    lower_count = max(0, length - digits_count - upper_count - special_count)

    digits = random.sample(string.digits, digits_count)
    specials = random.sample(string.punctuation, special_count)
    upper = random.sample(string.ascii_uppercase, upper_count)

dznet

int ledPin = 13;
//led for visualization (use 13 for built-in led)

int speakerPin = 11;
//speaker connected to one of the PWM ports

#define c 261
#define d 294
#define e 329
#define f 349