Direct control the external pins

[Jiloc]

Required Info
Camera Model	{ D435 }

Issue Description

Is it possible to directly control the external pins of the D400 devices? I can't find any example of it. I am interested to know if is possible to directly control the power pin to switch the external device on and off

[dorodnic]

Hi @Jiloc
I'm fairly certain this is impossible. You can use RS2_OPTION_INTER_CAM_SYNC_MODE to get signal out of the device every time it takes a frame, but these are not general purpose pins.

[MartyG-RealSense]

Over at the Intel Support site, users who tried getting a signal from Pin 1 early in 2018 before hardware sync support in firmware was released said it was too noisy to be usable. One user reported:

"We tried to read out pin 1 from the external sensors sync connector (GVSYNC0) while enabling the "Output Trigger" option in the RealSense Viewer but we could only measure a very noisy signal containing shutter noise, and not a clear trigger signal (e.g. 5V TTL)"

The main discussion about the pins at Intel Support can be found at the link below.

https://communities.intel.com/message/558842#558842

[Jiloc]

Thank you both for the answer, everything is cleare now.

Just FYI (or the interested of someone that will look for it in future) I tested that the pins are powered even if the camera is just attached to the computer and not only when the camera is turned on by the software.