1  # SPDX-FileCopyrightText: 2021 John Park for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  import time
 6  import board
 7  import busio
 8  from adafruit_hid.keyboard import Keyboard
 9  from adafruit_hid.keycode import Keycode
10  import usb_hid
11  import adafruit_mpr121
12  
13  # Create I2C bus.
14  i2c = busio.I2C(board.SCL, board.SDA)
15  # Create MPR121 object.
16  mpr121 = adafruit_mpr121.MPR121(i2c)
17  # Note you can optionally change the address of the device:
18  # mpr121 = adafruit_mpr121.MPR121(i2c, address=0x91)
19  kbd = Keyboard(usb_hid.devices)
20  keylist = [
21      Keycode.RIGHT_ARROW,
22      Keycode.ONE,
23      Keycode.TWO,
24      Keycode.THREE,
25      Keycode.FOUR,
26      Keycode.W,
27      Keycode.A,
28      Keycode.S,
29      Keycode.D,
30      Keycode.B,
31      Keycode.I,
32      Keycode.H,
33  ]
34  
35  # Loop forever testing each input and sending keystrokes when they're touched.
36  while True:
37      # Loop through all 12 inputs (0-11).
38      for i in range(12):
39          # Call is_touched and pass it then number of the input.  If it's touched
40          # it will return True, otherwise it will return False.
41          if mpr121[i].value:
42              # print("Input {} touched!".format(i))
43              kbd.send(keylist[i])
44      time.sleep(0.15)  # Small delay to keep from spamming output messages.