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Interface

Posted: Wed Jan 08, 2020 10:16 pm
by Hoize
I have a fresh install of QLC+ on my raspberry. Now i had the Idea if it is possible to use the raspberrys gpio Pins to create a dmx Signal (diy Interface). has somebody an idea How to do this? Or is there a Function implemented in QLC+ That creates a Interface with the gpio Pins ?

Sorry for my bad englisch.
Thanks
Elias

Re: Interface

Posted: Wed Jan 08, 2020 11:14 pm
by lighthacker2020
My guess is that you'll have better success tapping in to the pi's SPI bus vs. driving the gpios directly. I haven't seen anything in the app that would indicate sending output direct to gpios would be possible, however, I have seen posts in this forum about using the gpios assigned to the SPI bus use as an output, after doing a bit of configuration work for the pi. I believe there's even rpi and arduino hats available for this.

To use the gpio pins directly, you'd have to have a driver which is capable of outputting the DMX values over something with looks like RS485 signaling going through the gpio pins (3 required, ground, signal+ and signal-). I don't think QLC+ has that built in ... I didn't try to fight it, and just dropped the few buck to buy a USB DMX interface, which fit my budget :) Although I was attracted to the hacker-y aspect of using something via gpio for a while

Re: Interface

Posted: Thu Jan 09, 2020 7:36 am
by mcallegari
QLC+ on the raspberry pi has a native GPIO plugin but it's just to perform basic IO.
DMX using GPIOs is not supported and I suggest to use the RPi UART instead.

Re: Interface

Posted: Thu Jan 16, 2020 8:44 pm
by pgScorpio
DMX out using the hardware serial on rpi is available.
Also artnet and ola using this DMX out is available, so it should interface with qlc too.

As a starting point see https://www.instructables.com/id/How-to ... pberry-Pi/ for the basics and other links.

Never used it myself, but others did...