How to control status LED light on front of OAK4

kitschpatrol

I'm using a number of OAK4 Pro W cameras in a context where the bright blue LED indicator light on the front of the camera is going to be extremely distracting.

I dug through the docs and DepthAI source looking for some kind of programmatic control to dim or extinguish the indicator light, but found nothing...

Is there a way to turn off the light?

I'd love to avoid using a strip of tape.

Thanks!

jakaskerl

kitschpatrol
echo "0,0,0,0" > /dev/status_led where values are 8bit "a r g b". You can set the alpha to 0 to turn it off.

Thanks,
Jaka

kitschpatrol

Great, thanks Jaka!

So a reasonable way to set this with DepthAI v3 might be something like:

import depthai as dai

device = dai.Device()

with dai.Pipeline(device) as pipeline:
    script = pipeline.create(dai.node.Script)
    script.setScript("""
    import os
    while True:
        color = node.io['in'].get().getData()
        os.system(f"echo 1,{color[0]},{color[1]},{color[2]} > /dev/status_led")    
    """)

    script_input = script.inputs["in"].createInputQueue()

    pipeline.start()

    # Turn off status light at startup
    buffer = dai.Buffer()
    buffer.setData((0, 0, 0))
    script_input.send(buffer)

    while pipeline.isRunning():
        pass

kitschpatrol

Also it's not a problem, but FWIW the "alpha" value doesn't seem to have any effect on the status LED — though I'm not sure what alpha should mean in this context anyway since the color value's not composited over anything.

This turns the light to full white:

echo 1,255,255,255 > /dev/status_led

Light remains full white:

echo 0,255,255,255 > /dev/status_led

Alpha value doesn't appear in the stream from the device:

head -c 40 /dev/status_led
255 255 255255 255 255255 255 255255 255

I'm testing with an OAK4-D R7 / OS RVC4 1.11.0 (debug) / Agent 0.9.0.