test-keyboard.py

from RPi import GPIO
import time


CLOCK_PIN = 4
DATA_PIN = 15
DELAY = 0.00020


def send_bit(bit):
    GPIO.output(CLOCK_PIN, 1)
    GPIO.output(DATA_PIN, bit)
    time.sleep(DELAY)
    GPIO.output(CLOCK_PIN, 0)
    time.sleep(DELAY)
    GPIO.output(CLOCK_PIN, 1)


def send_byte(value):
    value_bits = list(map(int, bin(value)[2:].zfill(8)))
    value_bits.reverse()
    message = [0] + value_bits + [int(not sum(value_bits) % 2), 1]
    for bit in message:
        send_bit(bit)


def send_bytes(codes):
    for code in codes:
        send_byte(code)


try:
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(CLOCK_PIN, GPIO.OUT, initial=GPIO.HIGH)
    GPIO.setup(DATA_PIN, GPIO.OUT, initial=GPIO.HIGH)

    send_bytes([0x09])  # Press DEL
    send_bytes([0xf0, 0x09])  # Release DEL
    time.sleep(1)
    send_bytes([0xe0, 0x5a])  # Press ENTER
    send_bytes([0xe0, 0xf0, 0x5a])  # Release ENTER
finally:
    GPIO.cleanup()