You can operate the RobotiQ gripper directly from the UR controller by generating programs offline using RoboDK.
To add support for RobotiQ grippers you should select the Universal_Robots_RobotiQ post processor:
1.Right click a program or your robot
2.Select Select Post Processor
3.Select Universal Robots RobotiQ
You can then generate program calls that can operate the RobotiQ gripper. For example: rq_move_and_wait( 255 ) to open the gripper or rq_move_and_wait( 0 ) to close the gripper.
Once you have the program ready in RoboDK, you can run it on the robot using one of these 2 methods:
This method of operation does not require using the driver.