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626Pilot / RaspberryPi-NeoPixel-WS2812

Library for driving WS2812 pixels (also known as "NeoPixels" when sold by Adafruit) from a Raspberry Pi.
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Doesn't work on Raspberry Pi 2 ( see link inside for alternate library ) #4

Closed Gadgetoid closed 9 years ago

Gadgetoid commented 9 years ago

Ahoy! Just to let you now that this code now doesn't work on the Raspberry Pi 2. We use it in the library to drive one of our products, and I've been struggling to understand and fix it. I haven't got anywhere, so this is a humble cry for help! We'd be happy to support your efforts to make it Pi 2 compatible if you're up for it!

laboratories commented 9 years ago

yes please sir, more Raspberry Pi 2, please

arthur-esob commented 9 years ago

i was about to purchase a neopixel until I ran across your post Gadgetoid :-( would it help if i buy one and be a "guinea pig" ? I'm really looking forward to using the neopixel ring so if i can help...

Corteil commented 9 years ago

They work on Raspberry Pi 2 model b, have a look on my blog for details. http://www.corteil.co.uk/Blog/sonic-pi-trophies/

Have fun

Brian C

arthur-esob commented 9 years ago

ok thanks for the information. i just finished ordering a neopixel. ar you in for any kind of updates ?

arthur-esob commented 9 years ago

arfff... just received my neopixel, followed your guide on the blog and i get an error ... here's a snapshot that will help i hope ... pierre@raspberrypi ~/neopixel/rpi_ws281x/python $ ls examples ez_setup.py ez_setup.pyc neopixel.py neopixel.pyc rpi_ws281x.i setup.py strandtest.py pierre@raspberrypi ~/neopixel/rpi_ws281x/python $ cd examples/ pierre@raspberrypi ~/neopixel/rpi_ws281x/python/examples $ ls lowlevel.py neopixel.py neopixel.pyc strandtest.py pierre@raspberrypi ~/neopixel/rpi_ws281x/python/examples $ sudo python strandtest.py Traceback (most recent call last): File "strandtest.py", line 9, in from neopixel import * File "/home/pierre/neopixel/rpi_ws281x/python/examples/neopixel.py", line 3, in import _rpi_ws281x as ws ImportError: No module named _rpi_ws281x

doesn't seem to find the _rpi_ws281x module and i really don't know why ... any idea ?? pierre

arthur-esob commented 9 years ago

the 'test' program in rpi_ws281x lights almost all diodes (9 out of 12) ... i keep searching EDIT: had to change the Width and Height in main.c (my bad) then sudo scons and 12 leds are working

Corteil commented 9 years ago

Glad you found the answer.

communitywireless commented 9 years ago

This does not work on Raspberry Pi 2 B v 1.1. When I run the strandtest.py the session hangs and the python process needs to be killed from another terminal.

The EXACT same CF, LED strips and breadboard layout on a Raspberry Pi B+ 512MB runs fine.

Gadgetoid commented 9 years ago

@communitywireless I raised this in February, and nobody has yet got this particular library to work on Pi 2- however there is now an alternative which uses a different method and works beautifully: https://github.com/richardghirst/rpi_ws281x

Since this library hasn't been fixed, and from what I understand cannot be fixed ( we spent a few weeks trying ), then this issue is redundant. See the link above.

mclien commented 8 years ago

import _rpi_ws281x as ws ImportError: No module named _rpi_ws281x

Mind to share how you fixed that? I ran in the same problem and have no idea how to fix it...

arthur-esob commented 8 years ago

Wow it's been a while. Knowing myself, I must have tried to find the piece of code that was problematic and try to figure out how to fixe this. Let me know if you have any luck. I ll try to remember how i did that....

Date: Mon, 15 Aug 2016 09:16:54 -0700 From: notifications@github.com To: RaspberryPi-NeoPixel-WS2812@noreply.github.com CC: pierredeslandes@live.fr; comment@noreply.github.com Subject: Re: [626Pilot/RaspberryPi-NeoPixel-WS2812] Doesn't work on Raspberry Pi 2 ( see link inside for alternate library ) (#4)

import _rpi_ws281x as ws

ImportError: No module named _rpi_ws281x

Mind to share how you fixed that? I ran in the same problem and have no idea how to fix it...

— You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

mclien commented 8 years ago

Because I ran into deadline problems, so I needed a quick fix, a friend helped out and we solved it with this: https://www.pjrc.com/teensy/td_libs_OctoWS2811.html The Raspi is delivering the data via USB.

Additionally I was lagging a IC to get the 3.3V signal from the raspi stepped up to 5V. (We had some lights, but nothing correct). So perhaps I could have worked with the right voltage step up. I'll try to figure that out, but it's all kinda blurry right now after 2 nights with about 3h sleep max...

Graystripe17 commented 7 years ago

When performing the exact same steps to run test it says "Can't open device file /tmp/mailbox-3525: No such device or address" Is this an issue that I should open up?

Graystripe17 commented 7 years ago

Actually I can't open an issue. Please, can someone help me find out how they fixed it? Thanks

EDIT: @arthur-esob @mclien Was it a quick fix? I'm digging into this and am completely lost.

Graystripe17 commented 7 years ago

It's ok y'all. My problem was the exact same as @arthur-esob, I have the RPi2B I copied neopixel.py into examples sudo cp neopixel.py /examples and tested it out there where it couldn't find module _rpi_ws281x. For some reason it started working when I ran sudo python setup.py install. I thought I had previously installed it, so run it again just to be sure.

Don't forget to run sudo apt-get install python-dev swig python ./setup.py build as per the README.

May everyone have beautiful lights without problem!

darrenrobertsuk commented 7 years ago

@Graystripe17 you got this working on a RPi2B?

Graystripe17 commented 7 years ago

@darrenrobertsuk Yeah, RPi2B. This thread honestly worried me a bunch but it turned out just as good as I hoped.