Problems running keyboard.py with button shim

Support
1

Just purchased the button-shim. When I try and run the example, I get:

pi@raspberrypi:~/Pimoroni/button-shim/examples $ sudo python3 keyboard.py


Button SHIM: keyboard.py

Trigger keyboard key presses with Button SHIM.

Press Ctrl+C to exit.


Traceback (most recent call last):
  File "keyboard.py", line 33, in <module>
    @buttonshim.on_press(BUTTONS)
  File "/usr/local/lib/python3.7/dist-packages/buttonshim/__init__.py", line 294, in on_press
    setup()
  File "/usr/local/lib/python3.7/dist-packages/buttonshim/__init__.py", line 188, in setup
    _bus.write_byte_data(ADDR, REG_CONFIG, 0b00011111)
OSError: [Errno 121] Remote I/O error
Exception ignored in: <function InputDevice.__del__ at 0xb6328e40>
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/evdev/device.py", line 159, in __del__
  File "/usr/local/lib/python3.7/dist-packages/evdev/device.py", line 304, in close
  File "/usr/local/lib/python3.7/dist-packages/evdev/eventio_async.py", line 54, in close
  File "/usr/lib/python3.7/asyncio/events.py", line 640, in get_event_loop
  File "/usr/lib/python3.7/asyncio/events.py", line 660, in new_event_loop
  File "/usr/lib/python3.7/asyncio/unix_events.py", line 51, in __init__
  File "/usr/lib/python3.7/asyncio/selector_events.py", line 49, in __init__
  File "/usr/lib/python3.7/asyncio/base_events.py", line 373, in __init__
  File "/usr/lib/python3.7/asyncio/coroutines.py", line 28, in _is_debug_mode
AttributeError: 'NoneType' object has no attribute 'dev_mode'
Exception ignored in: <function BaseEventLoop.__del__ at 0xb636c4b0>
Traceback (most recent call last):
  File "/usr/lib/python3.7/asyncio/base_events.py", line 622, in __del__
  File "/usr/lib/python3.7/asyncio/base_events.py", line 390, in __repr__
  File "/usr/lib/python3.7/asyncio/base_events.py", line 1794, in get_debug
AttributeError: '_UnixSelectorEventLoop' object has no attribute '_debug'

I’m pretty sure I see it on the I2C bus (this is a PI Zero W):

pi@raspberrypi:~/Pimoroni/button-shim/examples $ sudo i2cdetect -y 1

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3f 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --
2

Double check that i2c is enabled in Raspberry Pi Configuration. Or raspi-config if running Buster lite.
Also run this from a terminal window i2cdetect -y 1
The button shim uses 0x3f

3

@alphanumeric We must has posted at the same time. I edited to show the i2cdetect output

4

I was posting while you were doing the edit. When I see I/O error I usually double check that i2c is alive and well. It’s being detected Ok so its likely not that.

5

How are your soldering skills? I ask because that shim requires soldering.
Did you solder all the Pin’s, or just what is used?

6

What are the pins that must be soldered on the header? I didn’t do every pin, since it said it only needed i2c, 5V and 3.3V. Since I was detecting the 3f in the i2cdetect, I figured it was communicating.

7

Ah, OK, you may be using the wrong 3.3v pin. It uses the one on pin 17, not the one on pin 1. Did you also solder the ground pin, pin 6 ?

8

Wow, would you believe I miscounted and soldered pin 19 instead of 17?

Working now, thanks @alphanumeric

9

That can happen. Now you get to have some fun. =)