1  # SPDX-FileCopyrightText: 2018 Limor Fried for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  # pylint: disable=multiple-statements,wrong-import-position,wrong-import-order
 6  import gc
 7  from adafruit_hid.keyboard import Keyboard; gc.collect()
 8  from adafruit_hid.keycode import Keycode; gc.collect()
 9  from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS; gc.collect()
10  import board
11  import pulseio
12  import adafruit_dotstar
13  import adafruit_irremote
14  import time
15  import usb_hid
16  
17  # The keyboard object!
18  time.sleep(1)  # Sleep for a bit to avoid a race condition on some systems
19  keyboard = Keyboard(usb_hid.devices)
20  keyboard_layout = KeyboardLayoutUS(keyboard)  # We're in the US :)
21  
22  led = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1)
23  decoder = adafruit_irremote.GenericDecode()
24  pulsein = pulseio.PulseIn(board.REMOTEIN, maxlen=100, idle_state=True)
25  
26  # Expected pulse, pasted in from previous recording REPL session:
27  key1_pulses = [0]
28  
29  key2_pulses = [1]
30  
31  print('IR listener')
32  # Fuzzy pulse comparison function:
33  def fuzzy_pulse_compare(pulse1, pulse2, fuzzyness=0.2):
34      if len(pulse1) != len(pulse2):
35          return False
36      for i in range(len(pulse1)):
37          threshold = int(pulse1[i] * fuzzyness)
38          if abs(pulse1[i] - pulse2[i]) > threshold:
39              return False
40      return True
41  
42  # Create pulse input and IR decoder.
43  pulsein.clear()
44  pulsein.resume()
45  
46  # Loop waiting to receive pulses.
47  while True:
48      led[0] = (0, 0, 0)   # LED off
49      # Wait for a pulse to be detected.
50      pulses = decoder.read_pulses(pulsein)
51      led[0] = (0, 0, 100) # flash blue
52  
53      print("\tHeard", len(pulses), "Pulses:", pulses)
54      # Got a pulse set, now compare.
55      if fuzzy_pulse_compare(key1_pulses, pulses):
56          print("****** KEY 1 DETECTED! ******")
57      keyboard.press(Keycode.SPACE)
58      keyboard.release_all()
59  
60      if fuzzy_pulse_compare(key2_pulses, pulses):
61          print("****** KEY 2 DETECTED! ******")
62      keyboard_layout.write("hello!")