Chaotic comands - only through relay about octoprint-ledstripcontrol HOT 4 CLOSED

From this:

If I send M150 R U B then the LEDs turn off.
M150 R255 turns on Blue.
M150 turns ON all colors.

For validating what I think is happening, can you also try with "M150 R", "M150 U", "M150 B" -- each should be a distinct color. Ideally red, green, and blue. Can you report on what the colors are; I suspect your setup will look like aqua, violet, and yellow-green. Then if you run "M150 R U" it should be blue, "M150 R B" should be green, and "M150 U B" should be red.

If that's the case, then your relays are working but the output is inverted. Does your relay board have connections labeled "NC" and "NO"? If so, switch to using the other.

from octoprint-ledstripcontrol.

M150 R - aqua
M150 U - violet
M150 B - yellow green
M150 R U - blue
M150 R B - green
M150 U B - red

You were right. After moving to NC contacts, the commands worked as they should have. So the relays have to be in active state in order to keep the LEDs off. When I shutdown the RPI all LEDs turn on, which means this is not a good solution either. So... how do other people connect their LED strips to get it going? Can you please point me to a valid tutorial or give me a little explanation? many thanks!

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Most people connect their LEDs via mosfets. Something ala https://learn.adafruit.com/rgb-led-strips/usage I'm using a custom board (OSHW release soon) designed by @thatch

from octoprint-ledstripcontrol.

Ok thanks for the help, much appreciated mate, I will order the parts. Problem solved.

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