Issues with 45+ LED Neopixel chain

emericklaw · September 2, 2022, 12:58am

I am not the only person to have this issue since recently a user posted:

github.com/Klipper3d/klipper

Issue with Neopixels over 45 LED

opened 05:51PM - 27 Aug 22 UTC

closed 12:02PM - 30 Aug 22 UTC

Guilouz

not on github

How many LEDs does Klipper support? Because I have strange issue, I have a 60… led ring (WS2812) with this config : [neopixel RGB1] pin: PD0 chain_count: 60 color_order: GRB initial_RED: 1 initial_GREEN: 1 initial_BLUE: 1 [gcode_macro NEOPIXEL_ON] description: Allumer les LEDs gcode: SET_LED LED=RGB1 RED=1 GREEN=1 BLUE=1 [gcode_macro NEOPIXEL_OFF] description: Eteindre les LEDs gcode: SET_LED LED=RGB1 RED=0 GREEN=0 BLUE=0 [gcode_macro NEOPIXEL_BLUE] description: Allumer les LEDs en bleu gcode: SET_LED LED=RGB1 RED=0 GREEN=0 BLUE=1 [gcode_macro NEOPIXEL_RED] description: Allumer les LEDs en rouge gcode: SET_LED LED=RGB1 RED=1 GREEN=0 BLUE=0 [gcode_macro NEOPIXEL_GREEN] description: Allumer les LEDs en vert gcode: SET_LED LED=RGB1 RED=0 GREEN=1 BLUE=0 At startup all my 60 led light on to white. No problem. If I light off led and light on again, only part of the leds light up but not the 60 If try to change another color, all my leds are not changed. When I try to light off only part light off. I have also tested with or without TRANSMIT parameters, same issue. If I set as example chain_count: 30 all is working as expected. Max number led without issue is 45.

And in Discord

Topic		Replies	Views
Trouble with Neopixels illuminating oddly General Discussion	2	77	April 14, 2025
Maximum single neopixel length General Discussion	4	1070	January 8, 2023
Not all WS2812Bs light up under certain configurations (not a power problem) General Discussion	17	214	October 9, 2025
Neopixel led string acting strange General Discussion	7	1188	April 9, 2024
Neopixel timing out of spec General Discussion	4	366	February 13, 2025

Issues with 45+ LED Neopixel chain

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