Neopixel 4-tuple -- W does not do anything

[smhodge42]

Once I realized the SK6812 Neopixel (from Adafruit) was an RBGW version, and used a 4-tuple as per the Micropython documentation, it works just fine, except that the additional W (white) value appears does not to do anything, for any value 0-255. I can make white by just setting the other 3 to 255. Is that the correct action, or should W do something?

[IHOXOHI]

Hey,
be carefull when you initiate your spi neopixel... ther is a classical way for rgb, but maybe you need to use the other one for rgbw. See the doc.

[smhodge42]

If you mean use the ‘bpp=4’ argument, yes, I did that. Without that only the red color works. With that, R,G,B work but W does nothing regardless of its value. From: IHOXOHI ***@***.***> Sent: Wednesday, February 5, 2025 7:24 AM To: micropython/micropython ***@***.***> Cc: smhodge42 ***@***.***>; Author ***@***.***> Subject: Re: [micropython/micropython] Neopixel 4-tuple -- W does not do anything (Discussion #16698) Hey, be carefull when you initiate your spi neopixel... ther is a classical way for rgb, but maybe you need to use the other one for rgbw. See the doc. — Reply to this email directly, view it on GitHub<#16698 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2XPQKT5WK6M2YWCRWRAAK32OIUJLAVCNFSM6AAAAABWPYGBCGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMBXGEYDENI>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[IHOXOHI]

I remember that I used a neopixel with the w value which can increase the intensity... but maybe with this model, there is a problem...

[IHOXOHI]

is it just one or more neopixel?

[smhodge42]

Just one. From: IHOXOHI ***@***.***> Sent: Wednesday, February 5, 2025 8:07 AM To: micropython/micropython ***@***.***> Cc: smhodge42 ***@***.***>; Author ***@***.***> Subject: Re: [micropython/micropython] Neopixel 4-tuple -- W does not do anything (Discussion #16698) is it just one or more neopixel? — Reply to this email directly, view it on GitHub<#16698 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2XPQKVJIAXWMQ3CBNSAZZD2OIZLZAVCNFSM6AAAAABWPYGBCGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMBXGE3DAMY>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[IHOXOHI]

are you sure that there is a w canal on this neopixel?
In the doc, it seems that there isn't...

[smhodge42]

Well, I thought it did, but I dug a lot deeper into the murky world of neopixels and found that there is more than one version of the SK6812, and I had unknowingly purchased the RGB version from Adafruit. I now have the RGBW version ordered, so I’ll repost after getting them and swapping it out on my PCB. Thanks for asking. From: IHOXOHI ***@***.***> Sent: Wednesday, February 5, 2025 8:13 AM To: micropython/micropython ***@***.***> Cc: smhodge42 ***@***.***>; Author ***@***.***> Subject: Re: [micropython/micropython] Neopixel 4-tuple -- W does not do anything (Discussion #16698) are you sure that there is a w canal on this neopixel? In the doc, it seems that there isn't... — Reply to this email directly, view it on GitHub<#16698 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2XPQKREHJ3JAODQXAPHAB32OIZ7JAVCNFSM6AAAAABWPYGBCGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMBXGE3DMOA>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[IHOXOHI]

For me, the w canal add more intensity (with more consumption). So more light, but the color is dissolved.
Look at my neopixel lib if you want to keep a white light and manipulate her intensity without this problem... I'm not sure that it's works for that...