1  # SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """CircuitPython Essentials PWM piezo simpleio example"""
 6  import time
 7  import board
 8  import simpleio
 9  
10  while True:
11      for f in (262, 294, 330, 349, 392, 440, 494, 523):
12          # For the M0 boards:
13          simpleio.tone(board.A2, f, 0.25)  # on for 1/4 second
14          # For the M4 boards:
15          # simpleio.tone(board.A1, f, 0.25)  # on for 1/4 second
16          time.sleep(0.05)  # pause between notes
17      time.sleep(0.5)