#!/usr/bin/env python3

import gpiozero
import sys
import time

class Vector4Keyboard(gpiozero.DigitalOutputDevice):
    def __init__(self, pin):
        gpiozero.DigitalOutputDevice.__init__(self, pin, active_high=True, initial_value=True)

    def type(self, char):
        c = ord(char)
        self._bit(0)
        for bit in range(7):
            self._bit(c&1)
            c >>= 1
        self._bit(0)
        self.on()
        time.sleep(71 / 1000)

    def _bit(self, bit):
        if bit:
            self.on()
        else:
            self.off()
        time.sleep(3.4 / 1000)


kbd = Vector4Keyboard(2)
print("Type:")
while True:
    kbd.type(sys.stdin.read(1))