RPI4 - Hyperbian - WS2812B

hello man,

we can write off a lot of things that is working,

• ledstrip is working
• live feed capturing is working
• Hyperion.NG runs
• PSU is working ( probably correct)

you can put the log in here > restart PI/Hyperion.NG en go to

press the wand and select expert level, then go to

and post it here.

you can run the ledstrip with 2 diffrent ledcontrollers

SPI and PWM

for PWM ( audio pulse) you need GPIO18 ( PIN12)

for SPI you need GPIO10 ( PIN19)

if you want to run PWM then select PWM in ledcontroler, make sure the ledlayout is correctly saved.

then in boot of SD card config.txt insert a extra line:

dtparam=audio=off

most of the time only this is enough to run PWM, if its not then you have to run Hyperion.NG as root

important:

also check the powersupply (PSU) > voltage not over 5 volts

power the ledstrip ( if in one piece) from BOTH sides

there is no errors in the debug log file,

can you change the dma setting from 5 to 10 in ledcontroller and turn off smoothing setting?

if this doesn't help then Hyperion has to run under root to give priority to PWM/

the only thing that is strange: SPI ledcontroller is also not working correct

can you also make a debug log file with SPI ledcontroller ( and attached to GPIO10)

also with smoothing turned off.

and increase baudrate setting from default and try again, it seems that ledstrip is receiving data but can not handle it.

• what type of PI 4 you have there?
• is the startup effect working, "Rainbow swirl fast" set as PWM or SPI ( and connected to correct GPIO?)

Zitat von Alaus

With this my ambilight works correctly. I must just do some ajustment for colors but that works.

check my profile about a topic i made to adjust colours in Hyperion.NG

Hello,

I'm trying to make an ambilight with roughly the same config as Alaus (WS2812B) with RPI3 B+.

I tried the solution proposed by Alaus but unfortunately it does not work either.

Here are the parameters that I enter for the controler type.

Could you please help me ?

(I'm french too if Alaus see my message)

For ws281x, Hyperion must run with root privileges. You can find all other settings here in the thread.

sudo updateHyperionUser -u root

regards pclin

Zitat von Alaus

In the web configurator :

Led material : WS281X - number of yours leds - GPIO12

GPIO18 is default GPIO for PWM0 ( forum users of Hyperion.NG always select this one)

so i would try this GPIO instead

Beitrag

RE: Adding strip leds on raspberry pi4

had to look it up and i didn't experiment with it myself, but has to be this

https://pinout.xyz/pinout/pin35_gpio19


hyperion-project.org/index.php?attachment/6557/

source: https://forums.raspberrypi.com/viewtopic.php?t=308908

GPIO 12 and 18 is "same group PWM channel
GPIO 13 and 19 is "second group PWM channel

Ambientheater77

7. Januar 2023

I had my ambient lighting working flawessly for a couple years. I was using a PI 4 with apa102 Leds.

I bought a new TV and switched to 2812B Leds and cannot get it working at all.

My system consits of:

- PI 4

- 284 - 2812B Leds

- USB video card

- 70 amp 5V power supply

I have 5 volts end to end. I have video that I can see through accessing via a browser.

I cannot get the leds to light at all. The positive of the power is attached directly to the leds (with a 1N4004) with the cathode towrds the led strip. The ground from the power is attached to the led strip and the PI ground. I have tried attaching the control signal wire to GPIO18 and GPIO12.... nothing. I have tried selecting ws281x and also ws2812spi... nothing. I really don't understand which to select?

Is it that root access creating the issues? I didn't need this with the apa102 leds. Do I need to reinstall a new version of Hyperbian on the card with root access? Or can I somehow activate root access on the card? Is there an easy way for me to do this?

Any ideas would be appreciated. I've been working on this all day and am frustrated and confused.

Many Thanks for any help you can provide.

Okay,

A few things,

when using GPIO18 you need to run PWM0 and ledcontroller ws281x

For that yes, you need to run Hyperion as root, so activate root access with Sudo command in terminal and reboot.

If you want to use GPIO10 (Mosi) you can run only SPI0 on ledcontroller SPIws2812

Get rid of the diode please. No artificial electronics is needed than only (maybe) a resistor at begin of your strip between the GPIO and the data IN.

Only thing a resistor does is lower down current trough the first led, if you power from more sides you don’t need it also.

ws281x must run with root rights, everything else works under the normal user.

Older Hyperion run with root privileges, but that has changed.

There is a script that you can easily use to change the Hyperion user.

sudo updateHyperionUser -u root

regards pclin