Unicorn HAT HD


#1

Hi All, very new here, bought the Unicorn HAT HD, for a Pi Zero W.

Installed as per instructions, but every example errors:

Unicorn HAT HD: Candle

This example simulates a flickering candle flame.

Press Ctrl+C to exit!

Traceback (most recent call last):
File “./candle.py”, line 102, in
unicornhathd.show()
File “/usr/lib/python2.7/dist-packages/unicornhathd/init.py”, line 139, in show
setup()
File “/usr/lib/python2.7/dist-packages/unicornhathd/init.py”, line 44, in setup
_spi.open(0, 0)
IOError: [Errno 2] No such file or directory

My SPI interface is on :
cat /boot/config.txt | grep spi

dtparam=spi=on

Limited knowledge means now I’m stumped!

Any ideas?


#2

Are you running it as Super User (SUDO)?


#3

What do you see if you: ls /dev/spi*

And also lsmod


#4

Hi All

Brief update, and thanks for the questions.

Firstly yes I was trying as root

Secondly I saw nothing with ls /dev/spi*, however the Pi config had it loading on boot, and it was rebooted.

I did try pretty much everything, but could not see the SPI device.

So I downloaded the raspberry image and completely blew my image away, and re-installed from scratch…

Voila the spi devices appeared and code worked and the screen lit up like an xmas tree!!

Great Stuff

And thanks for replying!

Wayne


#5

Thanks for dropping by and letting us know you’re up and running! Happy hacking!