DrumHAT - how?

Discussion Raspberry Pi
1

Hi,

Completely new to all this HAT stuff - bought a DrumHAT thinking “great, I’ll install it and in no time I’ll be tapping out rhythms on it!”

Well, it’s fixed to our raspberry pi, and I followed the (brief!) instructions on the github page.

When I try to run drumhat.py (is this even how I should be going about it?) I get the following:

pi@raspberrypi ~/drum-hat/library $ sudo python ./drumhat.py
Traceback (most recent call last):
File “./drumhat.py”, line 6, in
alert_pin=25)
File “/usr/local/lib/python2.7/dist-packages/Cap1xxx-0.1.0-py2.7.egg/cap1xxx.py”, line 239, in init
self.i2c = SMBus(i2c_bus)
IOError: [Errno 2] No such file or directory
Exception AttributeError: “Cap1188 instance has no attribute ‘alert_pin’” in <bound method Cap1188.del of <cap1xxx.Cap1188 instance at 0x76c38f80>> ignored

…and nothing happens.

Anyone out there got the DrumHat working? Or any advice as to how I might do so?

Thanks!

Paddy

2

Hello,

in ~/drum-hat/examples
try sudo python3 drumhat.py

3

Thanks, Darkhammer.

Unfortunately I get the message ‘no module named caplxxx’

And pip cannot find the module for me to install in python3 (it’s there in pyuthon 2.7…):

pi@raspberrypi ~/drum-hat/examples $ pip install caplxxx
Downloading/unpacking caplxxx
Could not find any downloads that satisfy the requirement caplxxx
No distributions at all found for caplxxx
Storing complete log in /home/pi/.pip/pip.log

4

Have managed now to install cap1xxx - when I realised that it was the digit 1 rather than the letter l in the middle…

Unfortunately running drumhat.py results in the same error as before:

pi@raspberrypi ~/drum-hat/examples $ sudo python3 drumhat.py
[‘drums2/000_base.wav’, ‘drums2/001_cowbell.wav’, ‘drums2/002_clash.wav’, ‘drums2/003_whistle.wav’, ‘drums2/004_rim.wav’, ‘drums2/005_hat.wav’, ‘drums2/006_snare.wav’, ‘drums2/007_clap.wav’]
Traceback (most recent call last):
File “drumhat.py”, line 28, in
alert_pin=25)
File “/usr/local/lib/python3.2/dist-packages/cap1xxx.py”, line 239, in init
self.i2c = SMBus(i2c_bus)
IOError: [Errno 2] No such file or directory
Exception AttributeError: “‘Cap1188’ object has no attribute ‘alert_pin’” in <bound method Cap1188.del of <cap1xxx.Cap1188 object at 0x216e930>> ignored

5

Did you enable i2c?

curl -sS get.pimoroni.com/i2c | bash
1 Like
6

I enabled it via raspi-config, but on running the script you suggested I get:

I2C Already Enabled

Adding

i2c-dev
to /etc/modules

Adding
i2c-bcm2708
to /etc/modules

And, that does the trick! Thank you very much RogueM!

Paddy

7

Great (though I’m not sure why you had trouble earlier)!

8

Hi,
I’m doing something wrong, haven’t worked out what with Drumhat.
Have enabled i2c and I know the speaker works as I’ve swapped over with my piano hat. When I try drum sounds I get lights on the Drumhat but no sound.
I’ve tried it on Pi3 and Pi2. I’ve shutdown to add the hat before rebooting :)
Any ideas appreciated.

9

what are you using to produce sounds?