[BUG] oak-ffc-4p cannot be triggerred by external signal

[ryanESX]

Describe the bug OAK-FFC-4P connects 4 oak-ffc ov9282(https://shop.luxonis.com/products/oak-ffc-ov9282-pair). I use 1.8V pulse to trigger camera in every 100ms on COM_AUX_IO2 pin (PSRBS connector). But I couldn't see any incoming image. But I did use probe to check every camera fsync pin. All fsync pin shows 1.8v pulse.

Minimal Reproducible Example can check this code https://gist.github.com/ryanESX/4c05a6b948a782f99cec7dd1efbd996a

Expected behavior It can show 4 images in similar timestamp

[openmoverse]

Hey, we're also trying to work with the HW sync stuff and we know that we should work with 12-24V you can also follow #784