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cp2004 / OctoPrint-WS281x_LED_Status

Add some RGB LEDs to your printer for a quick status update!
https://plugins.octoprint.org/plugins/ws281x_led_status
GNU Affero General Public License v3.0
112 stars 27 forks source link

It does not work with SPI Elegoo 3.5 touchscreen #83

Closed thomasgoehler closed 3 years ago

thomasgoehler commented 3 years ago

I have set up the plugin according to your instructions. I also did a check of the parameters.SPI is enabled, user pi is added in the gpio group, bufsize is also set and so on. I am using 4 LED strips with 8 LEDs each(WS2812b) which I have connected together. A short test with an Arduino Nano showed that it works. The strips are powered by an external 5V source, I used a Logiclevel converter. Next I tested the LED strip on the Pi using the ws28xx library and python. With GPIO 18 via PWM it worked. But not with GPIO10 (SPI). Here I found what I was looking for and got an error. SPI is accessed via /dev/spidev0.0, but this is already in use or blocked by my touchscreen. I then removed the touchscreen driver. Without touchscreen your plugin runs perfectly. Now my question: Can you possibly adapt the script so that it can control the LED bar via PWM(GPIO18) or that one can change the SPI device to e.g. /dev/spidev1.0?

My configuration: Pi 3b+ with actual Raspberry Pi OS Octoprint 1.52 installed manually (as described in the official wiki)

cp2004 commented 3 years ago

You can change the GPIO pin to 18 if you wish, though you'll have to run OctoPrint as root which for security concerns is not recommended. See #63 or #64 for details.

There's a section in the troubleshooting guide (which you would have seen before deleting the template hopefully) about SPI touchscreens, and specific instructions where someone had this issue before.

thomasgoehler commented 3 years ago

thank you for your advice. I will try to enable auxiliary SPI then it should be possible to run two SPI devices at the same time. I hope I can do that. Otherwise I will get rid of the display and use one with HDMI connection. The touch functionality I don't really need and was nice to have. Your really awesome plugin should stay of course.