Hello all,

I use two USB 3.0 Basler cameras as a stereo system on a car. Since the car moves, I need to synchronize two cameras. For this reason, I bought a 6-pin cable that connects cameras.

I want the left camera to be the master and generate a trigger, and I want the right camera to be a slave and start to capture by receiving a trigger.

I did the setting in pylon viewer, which works in pylon viewer. I stored the setting for two cameras in their user set 2. When I want to work with ROS, I load the user set 2 for each camera. However, I get an error. The left camera (master) works at 32 fps (its maximum). However, the right camera (slave) does not work, and this error happens:

An image grabbing exception in pylon camera occurred: waiting for frame trigger ready time out. Error: Grab was not successful Failed to grab image, can't calculate current brightness

An image grabbing exception in pylon camera occurred: waiting for frame trigger ready time out. Error: Grab was not successful . . .

There is no good documentation for hardware synchronization, and I could not find the answer anywhere else.

To give you more detail, in the following, I provided the information:

• the setting for the left camera in pylon viewer, which I save in user set 2
  • the setting for the right camera in pylon viewer, which I save in user set 2
  • ROS launch file
  • ROS config for the left camera
  • ROS config for the right camera
  • Error message and information related to image topics

the setting for the left camera in pylon viewer, which I save in user set 2

the setting for the right camera in pylon viewer, which I save in user set 2

ROS launch file

ROS config for the left camera

ROS config for the right camera

Error message and information related to image topics

Thank you for your time,