Camera Ringlicht - Camera with WS2812 LED lighting

[hansamann]

Hi all,

I've been trying to integrate with the Ringlicht - it's a little board that has 12 WS2812 LEDs - perfect for lighting up the scene before a shot.

https://github.com/watterott/RPi-Camera-RingLicht

Altough my experiments with the WS2812 leds and python2 are successful, I fail to integrate both. Maybe someone with a bit more python knowledge (mine is really low) could help here.

Right now I am using this libary and the examples for python of this GithHub repo work nicely, also my own examples based on these:

https://github.com/rpi-ws281x

My example code alone looks similar to this:

import time
from rpi_ws281x import PixelStrip, Color

LED_COUNT = 12        # Number of LED pixels.
LED_PIN = 18          # GPIO pin connected to the pixels (18 uses PWM!).
# LED_PIN = 10        # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
LED_FREQ_HZ = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA = 10          # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 255  # Set to 0 for darkest and 255 for brightest
LED_INVERT = False    # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 0       # set to '1' for GPIOs 13, 19, 41, 45 or 53


# Define functions which animate LEDs in various ways.
def color(strip, color, wait_ms=50):
    """Wipe color across display a pixel at a time."""
    for i in range(strip.numPixels()):
        strip.setPixelColor(i, color)
        strip.show()
        time.sleep(wait_ms / 1000.0)



# Main program logic follows:
if __name__ == '__main__':

    strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
    strip.begin()
    color(strip, Color(255, 0, 0))  # Red wipe
    strip.show()

    

I've been trying to integrate it into user_interface.py (also I hacked the startup script as the led driver requires sudo, so the photobooth.sh script now does a sudo python), but I get a weird error telling me that strip.setSetPixelColor is being called with 4 arguments. I am only passing three, I am assuming that "self" from the python class system somehow gets passed. Problem is, it's a method from the pixel library, so how can I call it with only the three variables?

Sorry, I realize it is a bit confusing. Maybe someone could let me know what would be the best place to initialize the LED strip and then call the led strip functions. Ideally I want to start the led strip if someone has clicked the single/multiple/animation buttons and then turn it off again after the pics are taken.

Thx to all, this is a great project. It saved me a ton of time...

[Raffa2s]

HI, i want to do something similar with this led ring
Did you achieve your goal?

[hansamann]

Sadly I did not but I've not tried that hard. I assume it might aloso be some python2/3 thingy...

[wyojustin]

Very cool! This should not be difficult. Please paste the error message here.

[rogergithubbing]

Altough my experiments with the WS2812 leds and python2 are successful, I fail to integrate both.

Hello Hansaman... Did you succeeded integrating the led as a flash ? Anyone else ? I'm seriously planning to do my own photobooth with flash, and a raspberry 4...