Only first led of WS2818B lights up

I have the issue as described above.

Config: Rpi3, Hyperbian, WS2812B 240 leds, connected to GPIO (18), powerblock powersupply (100W)

When I start up Hyperion, only the first led powers on.

Capture card works and that first led responds to what the capture card 'sees'

All leds were on once, after that I rebooted the Rpi to test again, and the problem was back.

I can't find out the problem, checked all connections over and over.

I measure almost 5V at the end of the tape, so power is good and tape is not cut somewhere.

I added the config in the attachments, it must be in there....

I hope you can help me...

No one any idea?

Thanks Yasir, this looks like transfering Hyperion from one user to another.
I read something about no rights to use the GPIO.
I will give it a try

Thank you Lighting-guy.

A few remarks. I don't have 'hyperiond@.service', I do have hyperion.service.

The content of that file does not have a User section.

See below the content of the file above.

[Unit]

Description=Hyperion ambient light systemd service

After=network.target

[Service]

ExecStart=/usr/bin/hyperiond

WorkingDirectory=/usr/share/hyperion/bin

TimeoutStopSec=5

KillMode=mixed

Restart=on-failure

RestartSec=2

[Install]

WantedBy=multi-user.target

The changes of Yasir also don't work because of the system service name.

By the way, I would expect it to be a more config issue...
As the first led does everything you would expect, just led 2 until 240 don't

So addressing the other 239 leds seems to be the issue, rather then rights to use the GPIO (IMHO)

Oké. But I searched of the file, it does not exist on my Pi with Hyperbian.

Can anyone confirm my config (screenshots) Is good?

Any other way to test the connection to the led tape?

Is there anything in /boot/config.txt that might be causing issues?

Here is the listing:

# Uncomment this to enable infrared communication.

#dtoverlay=gpio-ir,gpio_pin=17

#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)

dtparam=audio=on

[pi4]

# Enable DRM VC4 V3D driver on top of the dispmanx display stack

dtoverlay=vc4-fkms-v3d

max_framebuffers=2

[all]

#dtoverlay=vc4-fkms-v3d

Yeah, saw that when I posted it. DIsabled that one.

No effect though, still only the first led active

On the first command (like earlier) Failed to disable unit: Unit file hyperiond@pi.service does not exist.

I will run the update/upgrade, did that after install, but who knows

Hi Mike,

I think you are right! I already tried holding the data out to the middle wire, but that did not give the right result.

Now I waited a few exta seconds and you could see the software addressing them all.

So, I cut the first few leds from the tape (I already did the same on the other side, seems damaged as well.

Tomorrow I will do some soldering of wires. Any suggestions how? I mean, what is the most stable approach?

I have a slodering station, heat shrink tube etc.