Neopixels - Duet3 Mini5

k0s

Hello,
i searched trough and just found half baked results for a working, lets say - 3 ring neopixel setup for a duet 3 (Mini5 + eth in my case).

I couldnt find any working and final solutions so far or i am looking at the wrong end.

I hope and wonder if someone made a working and successful solution?
Due to the fact that the Duet3 has a dedicated Neopixel pin, i wonder if someone made it to have it working with an SBC ? without the need for a seperate arduino or whatsoever -

Else it looks like i have to go down the route with the 2 year old BLV_NeoPixel integration by using an Mega and so on...

Thanks in Advance!
Dee

peter247

@k0s If I remember right you can't control neopixels from the raspberry pi due to timing demands of neopixels with the operating system , you can control them from a multitasking OS like Linux .

k0s

@peter247 its more about the dedicated Neopixel Pin on the mini 5+ - in a SBC environment

peter247

@k0s Do you want to control them with a program running on the Pi , but using the neopixel pin on the duet 3 mini 5 + , or have to pin on the PI ?

k0s

@peter247 i had the hope to use the dedicated pin on the duet and - whoever can in this constellation - will control the 3 rings to indicate temperatues and progress...

i am not a coder at all but i could imagine in the sbc case, the rasp would send the data to the duet to drive the pixels - hence i think the duet is just running as a pure printerface

peter247

@k0s Look for a BLV MGN CUBE which uses 3 neopixel ring , so that should give you a clue how to set it up. ( it look like they don't use the neopixel pin too )

And this is how to control them with g coded .
https://duet3d.dozuki.com/Wiki/Gcode#Section_M150_Set_LED_colours

k0s

@peter247 yeah and thats where i come from - i wanted a pure duet3 SBC solution and not something to be done with another raspi/arduino. I thought after 2 years it could be possible someone had a solution handy.

The BLV solution is one of the solutions i was referring to in my first post, which based on things from MartinNYHC who also setup a system with the BLV solutions - but never finished. I did contact him already a while ago...

peter247

@k0s Soon I can let you know how to do it because I'm going to install 3 neopixel rings and a strip on my standalone duet 3 mini 5+.
Having problem calibrating my cube so being delayed a little moving on to installing neoplxels.

k0s

@peter247 aye, yeah i finally will end up using the arduino/pro mini solution and sniff the data from the paneldue jacks then.

for now i will use a standard pixel strip and a mega - the ring and pro mini will arrive tomorrow.

I guess the most recent and up to date git will be the NeoPixelBLVmgn and might work easy.... since the repository is updated just yesterday.

dc42

@k0s the NeoPixel support on Duet 3 Mini should work in both standalone and SBC mode.

engikeneer

@k0s You can connect the NeoPixel straight up to the D3Mini (though you need an external 5V supply). No need for an extra arduino baord - that was for the Duet2 Wifi.

From a quick search on the duet dozuki, maybe this page will help you: https://duet3d.dozuki.com/Wiki/Neopixel_and_DotStar_LEDs#Section_Configuring_and_controlling_LED_strips
Tells you how to wire it up and which commands (M150) to use to configure them

k0s

@dc42 i tried the way to use the Txd0 from the paneldue port (io.0) and sniff the data with an arduino micro - no success Claus from BLV projects told me its simply not possible with the duet3 to receive any data - which is kinda bad.

i am after their solution by adressing 3 pixel rings to show 3 status in parrallel....

i jave no clue how to solve an timed interval with m150 codes tbh...

therefore i thought the external sniffing solution would work. aside from that the project is really hot - when it comes to the neopixel status rings.

sadly i am not able to make use of the built in neopixel pin, since i lack in skills to "code" it with the m150 commands...

another question would be: why isnt it possible anymore to sniff the data simply with the RX from am arduino?????

thanks so far

k0s

Ok from another user i got the information to use the io.1 instead of the io.0.
in this case the wiring would be to use in,out,5v,gnd to arduino tx,rx,5v,gnd. running M575 P2 S1 B57600 command.

i will check this later today - only question left open is to have a level shifter for the in/tx between the arduino and the io.1.

k0s

Great:

the BLV solution works like a charm. Using the UART available on the IO.1 all 4 connections rx/tx/gnd/5v and the latest github sketch for an arduino micro or pro mini...