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MikeEllis-personal / DMXfire

A DMX-controlled fire flicker effect using the Pico and WS2812 led arrays
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Just a question #1

Closed Tommie1236 closed 2 years ago

Tommie1236 commented 2 years ago

Can you maybe give me a little example how I can use this? I'm trying to make a tiny dmx controller using a RPI pico and this is the only python software i have found.

MikeEllis-T67M commented 2 years ago

Thanks for reaching out to me. The code is very definitely unfinished - please use it as a basis, but it may (or may not!) work correctly. I know, for example, that it will fail with RDM over DMX universes - I haven't worked out how to fix this yet.

As a quick way to see how to use the code, the test harness as the end of dmx.py should be enough to get you going.

Good luck!

Mike.

MikeEllis-personal commented 2 years ago

As a quick way to see how to use the code, the test harness as the end of dmx.py should be enough to get you going.

Tommie1236 commented 2 years ago

Thanks for responding. That was what I was looking for.

Another question: How did you attach/connect your dmx? To the gpio pins directly, connect one pin to a tll to rs485 converter or something else?

MikeEllis-personal commented 2 years ago

At the moment I am connecting a protocol analyser to the GPIO pins, and also using the transmit code to exercise the receive code. I have a half-completed PCB design for the level shifter and opto isolator based on the information at http://www.mathertel.de/Arduino/DMXShield.aspx but as yet I've not built and tested this.

bdyetton commented 1 year ago

@Tommie1236 Did you get this working with a rs485 converter in the end?

Tommie1236 commented 1 year ago

No, I coudn't get it working before I wanted to use it, after that I was working on some other things and completely forgot about it. And I don't currently have any dmx fixtures to test with. Sorry

MikeEllis-personal commented 1 year ago

I have some a fair bit on the code recently, and I now have proved that it works for reception of DMX with a commercial RS485 level shifter from eBay. There are still some rough edges to smooth off, and I haven't yet done real world testing of the transmit side, however the firelight effect I have created works really well!