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Since FW 0.15.1 an LED strip is flashing
What happened?
Two LED strips WS2812B with 300 LEDs are connected to GPO 16 + 02 on WLED and work without problems.
To Reproduce Bug
It worked fine with firmware 0.15.0, but since 0.15.1, a stripe has been flashing every 10-30 seconds. After resetting to 0.15.0, the flashing stopped.
Expected Behavior
No blinking, just unilight.
Install Method
Binary from WLED.me
What version of WLED?
WLED 0.15.1 (Build 2507300)
Which microcontroller/board are you seeing the problem on?
ESP32
Relevant log/trace output
Anything else?
No response
Code of Conduct
- [x] I agree to follow this project's Code of Conduct
Sorry, chanced.
Am 02.08.2025 um 11:59 schrieb Blaž Kristan @.***>:
blazoncek left a comment (wled/WLED#4805) https://github.com/wled/WLED/issues/4805#issuecomment-3146402874 English, please.
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I've got the same issue. I've got 4 segments, and (I think) two of them are flickering. I2S parallel is enabled (@hardl1 you can find this setting in Config > LED Preferences, just below the memory usage)
Reverting to 0.15.0 "fixes" the issue.
That's right, I updated again to 0.15.1, the field is there, it's enabled, but it still flashes.
What is that flicker like? just single LEDs or the whole strip and what is you hardware setup? ESP32 with or without levelshifter (which shifter).
The entire strip is flashing. I can't comment on the level shifter, as I bought the device ready-made.
Could anyone experiencing this issue please post their cfg.json file? I haven't been able to replicate it locally, but I have a suspicion it might be related to exact LED strip lengths.
How do I do that? I'm back on 0.15.0, but I can change that.
Settings..Config..Security and Updates; push 'Backup Configuration' and it will download the cfg.json file. You don't need to change software versions; how the software handles the cfg from the older version is relevant to testing.
I've got one from another channel I'm testing now.
I have similar issue with 15.1 (downgrade to 15.0 resolves it) I see flashing when changing brightness of the wled via home assistant. In any case and for all my strips. And I see flashing when open the wled app on my phone or bring the app back in the front (after using another app) in all this cases Tha strips are flashing (switching off for some ms and on again)
Attached you'll find my config. I'm unsure if the lengths of the strip match the configured values. wled_cfg.json
I'm seeing this as well, but only with the first 60-ish LEDs of one strip (labelled Southeast in the config). Config attached. FWIW, I'm using a QuinLED Dig-Quad.
Same problem on both controllers I updated so far, both are Gledopto ESP32 based
Same issue here on QuinLed Uno after upgrading from 14.0 - 15.1, and also trying 16.0 dev.
Same issue here. ESP32 with 9 pins driving 100 leds each. Was working fines for 2 years before. Already disabled all the I2S pins as they were conflicting with the led-pins. Disabling the new Use parallel I2S seems to help in my case.
Here an extra config: wled_cfg_wled-dana-cama.json
Also, at least on my devices, I can always reproduce the problem going from or to the "waterfall" effect to almost any other, specially "solid"
Same Issue
ESP32 with level shifter 2 legs, leg A fine, leg B starts flashing/issues at led 79(approx) and the rest of the leg. working fine until 0.15.1 reverted back to 0.15.0 and all fine
Same here. It also flashes every time, I refresh the list of my WLED installations in the Android app. Maybe it's somehow network related?
Hi, seems like I have the same problem. I use a « percent » effect to display my solar production output. Since recently ( back from vacation), each time the value changes ( percent value, brightness) the full LED strip blinks (looks like the effect is resetting full length), in the past, if the solar production value increased, new LED’s would lit but others would remain solid (and not flicker). I changed the effect speed to 255 (the max), it improved the situation a little but it’s still not instant. (I played with transition speeds from 0.7sec to 0sec with no results). I have a esp32, wled 0.15.1 build 2507300. I am afraid to go to 0.15.0 and loose everything.
@Fauch123456789 you can backup your presets and configuration in the settings in case something fails. Then flash the 0.15.0 version. I did that and I did not lose anything.
@Fauch123456789 I even downgraded without the need to restore anything. Took 3min and everything was fine again.
@Fauch123456789 I even downgraded without the need to restore anything. Took 3min and everything was fine again.
Thank you both, I downgraded back to 0.15.0 and the problem is gone so: problem solved! I did not need to reload my presets.
Mine isn't the entire strip, it's just some of the LEDs. I have a QuinLed Uno with 195 LEDs and a dim warm white setting, and it'll randomly flash some of the individual pixels green. The pride preset is also extremely flickery. I see the same behavior with or without parallel I2S enabled.
Edit: 1 output (WS281x), 55mA, GRB, 195 pixels
