Robotiq 2F gripper serial passthrough


I’m working with UR5e with a Robotiq 2F gripper, and am trying to control both from a single ROS machine. I have verified that the gripper works using the UR5 pendant, and that I can control the robot arm through ROS. However, when enabling the tool communication option in the ROS driver launch file, I am facing the same error as described here: Robotiq Gripper via Universal Robot Failure - ROS Answers: Open Source Q&A Forum. So in parallel to trying the hacky solution in that post, I am hoping to get some help in resolving this without tinkering with the UR5 onboard computer.

Thanks in advance.