import machine
import pyb

KEY_KEYPAD_PLUS = 0x57

hid = pyb.USB_HID()
button = machine.Pin(12, machine.Pin.IN, machine.Pin.PULL_UP)

def press_key_once(key1):
	buf = bytearray(8)
	buf[2] = key1
	hid.send(buf)
	pyb.delay(10)

def release_key_once():
	press_key_once(0)


buf = bytearray(8)

state = False
while True:
	pressed = not bool(button.value())

	if pressed == state:
		continue

	if pressed:
		press_key_once(KEY_KEYPAD_PLUS)
	else:
		release_key_once()

	state = pressed

	pyb.delay(10)