I am trying to trigger an external strobe using the m8 connector on the backside. I have connected STROBE_ISO (pin6) and GND_ISO (pin 7) to trigger the external flash controller. In the code I added the following line in [mono_preview.py](https://github.com/luxonis/depthai-python/blob/main/examples/MonoCamera/mono_preview.py) : `monoRight.initialControl.setStrobeExternal(48,1)` however this works for the **OAK-D S2 PoE**, but if use the exact same cable and code on the **OAK-D SR PoE** it does not output any trigger.

Hi @"toon"#1264 , it's because there's nothing connected to IO48. [upl-image-preview url=https://discuss.luxonis.com/assets/files/2024-08-14/1723630743-717699-image.png] Also on S2 PoE I don't think `setStrobeExternal` does anything - likely you just get strobe output directly from left camera (looking at schematics). Checking on my side as well...

Just running https://github.com/luxonis/depthai-python/blob/main/examples/StereoDepth/depth_preview_sr.py works for me: https://drive.google.com/file/d/1Nx0A_CE_PoYOO1wPAoVlO3hM4kPlFdxI/view?usp=sharing

@"erik"#p25044 Yes, it is always.

@"toon"#1264 which depthai version?

@"erik"#p25046 version 2.27.0.0, python 3.8, bootloader version 0.0.28

Strobe output trigger on OAK-D SR PoE

toon

I am trying to trigger an external strobe using the m8 connector on the backside. I have connected STROBE_ISO (pin6) and GND_ISO (pin 7) to trigger the external flash controller.

In the code I added the following line in mono_preview.py :

monoRight.initialControl.setStrobeExternal(48,1)

however this works for the OAK-D S2 PoE, but if use the exact same cable and code on the OAK-D SR PoE it does not output any trigger.

erik

Hi @toon , it's because there's nothing connected to IO48.

Also on S2 PoE I don't think setStrobeExternal does anything - likely you just get strobe output directly from left camera (looking at schematics). Checking on my side as well...

erik

Just running
luxonis/depthai-pythonblob/main/examples/StereoDepth/depth_preview_sr.py
works for me:

toon

@erik thanks for the quick reply. I am quite sure that I really needed to add the line, before it was outputting a strobe signal on the S2, but I will verify this afternoon.

monoRight.initialControl.setStrobeExternal(48,1)

On the script you suggested, I am running into another issue.

luxonis/depthai-pythonblob/main/examples/StereoDepth/depth_preview_sr.py

If I run that script, the code keeps forever waiting on line 59 (queueNames = device.getQueueEvents()) any idea what is causing that?

erik

@toon likely communication issue. Does it happen every time you run the script?

toon

erik Yes, it is always.

erik

@toon which depthai version?

toon

erik version 2.27.0.0, python 3.8, bootloader version 0.0.28

erik

Then likely it's a comms issue, please follow the guide here (initial conn debugging):
https://docs.luxonis.com/hardware/platform/deploy/poe-deployment-guide/#Debugging