buzzer.py

#!/opt/kasse/venv/bin/python3

#based on https://www.circuitbasics.com/how-to-use-buzzers-with-raspberry-pi/
import time
import RPi.GPIO as GPIO

class Buzzer:
	B0=31
	C1=33
	CS1=35
	D1=37
	DS1=39
	E1=41
	F1=44
	FS1=46
	G1=49
	GS1=52
	A1=55
	AS1=58
	B1=62
	C2=65
	CS2=69
	D2=73
	DS2=78
	E2=82
	F2=87
	FS2=93
	G2=98
	GS2=104
	A2=110
	AS2=117
	B2=123
	C3=131
	CS3=139
	D3=147
	DS3=156
	E3=165
	F3=175
	FS3=185
	G3=196
	GS3=208
	A3=220
	AS3=233
	B3=247
	C4=262
	CS4=277
	D4=294
	DS4=311
	E4=330
	F4=349
	FS4=370
	G4=392
	GS4=415
	A4=440
	AS4=466
	B4=494
	C5=523
	CS5=554
	D5=587
	DS5=622
	E5=659
	F5=698
	FS5=740
	G5=784
	GS5=831
	A5=880
	AS5=932
	B5=988
	C6=1047
	CS6=1109
	D6=1175
	DS6=1245
	E6=1319
	F6=1397
	FS6=1480
	G6=1568
	GS6=1661
	A6=1760
	AS6=1865
	B6=1976
	C7=2093
	CS7=2217
	D7=2349
	DS7=2489
	E7=2637
	F7=2794
	FS7=2960
	G7=3136
	GS7=3322
	A7=3520
	AS7=3729
	B7=3951
	C8=4186
	CS8=4435
	D8=4699
	DS8=4978

	def __init__(self, gpio):
		GPIO.setmode(GPIO.BCM)
		GPIO.setup(gpio, GPIO.OUT)
		self.buzzer = GPIO.PWM(gpio, self.A4)

	def beep(self, tone, duration):
		self.buzzer.ChangeFrequency(tone)
		self.buzzer.start(50)
		time.sleep(duration)
		self.buzzer.stop()

	def abort(self):
		self.beep(self.F4, 0.15)
		time.sleep(0.05)
		self.beep(self.C4, 0.15)

if __name__ == '__main__':
	buzzer = Buzzer(19)
	buzzer.abort()