I am attempting to work with a 2f-85 gripper using ROS via the serial to usb connector. I am unable to to connect properly, and the ros driver crashes. Using the exact same computer and ros driver I am able to control a different 2f-85 gripper (we have two), so I have narrowed the problem down this specific gripper (the wiring seems ok). The gripper itself is not damaged. We were originally using the gripper with the URCaps package on a UR5e, and it was completely functional. Now we have switched to the external cable/usb to control the gripper with ROS. Right now we just get a solid red light when powered on. The FTDI serial to usb driver appears to be registering correctly. We have also tried to access the gripper through the "Robotiq User Interface" program, and tried to recover the gripper, but failed to make a connection. We have tried some of the troubleshooting guides, and haven't gotten anywhere. Do you have any suggestions?

"We have also tried to access the gripper through the "Robotiq User Interface" program, and tried to recover the gripper, but failed to make a connection. We have tried some of the troubleshooting guides, and haven't gotten anywhere. Do you have any suggestions?"
You should be able to connect the gripper on Robotiq user interface (RUI).
Did you supply the gripper with 24V ? I would recommend a 2A power supply.
For the recovery you have to connect press the recover button cut the 24V power for 1s and connect it again.

Could you donwload the latest RUI version and try again to connect your gripper ?

If the gripper is working with RUI, then you can try with ROS. If it is not working you can directly send your questions to ros@robotiq.com