To achieve wireless communication with an RP Lidar connected to your EZ-B v4 robot, you would typically use a wireless communication module or adapter that can transmit USB data over a wireless network. However, directly converting a USB connection (like that of an RP Lidar) to a wireless connection isn't straightforward due to the complexity of USB communication protocols.

One potential solution is to use a device known as a "Wireless USB Hub" or "Wireless USB Extender." These devices can extend the range of USB devices by connecting them to a hub that communicates wirelessly with a receiver connected to your computer. This setup would allow your computer to communicate with the RP Lidar as if it were directly connected via USB, even though it's moving around with the robot.

Here's a general approach to setting this up:

1. Wireless USB Hub/Extender: Look for a wireless USB hub or extender that can transmit USB data over Wi-Fi or another wireless protocol. Make sure the device supports the data rates required by your RP Lidar.

2. Connect RP Lidar to Wireless Hub: Connect your RP Lidar to the wireless USB hub. This hub will act as the transmitter, sending data from the RP Lidar to a receiver.

3. Receiver Connected to Computer: The receiver part of the wireless USB hub should be connected to your computer. This setup will allow your computer to receive data from the RP Lidar wirelessly.

4. Software Configuration: Depending on the wireless USB hub/extender you choose, there may be software that needs to be installed on your computer to facilitate communication with the RP Lidar. Follow the manufacturer's instructions for setup and configuration.

5. Integration with EZ-B v4: Ensure that your robot's control system (in this case, Synthiam ARC) is configured to receive and process data from the RP Lidar. This might involve setting up the correct port or interface in the ARC software to listen to data coming from the wireless receiver connected to your computer.

Please note that the performance and reliability of wireless USB extenders can vary, and there may be latency or interference issues depending on the environment and the specific devices used. Additionally, not all wireless USB hubs/extenders may support the specific requirements of the RP Lidar, so it's important to verify compatibility before purchasing.

If you're looking for a more integrated solution within the Synthiam ecosystem, consider using supported wireless communication methods or exploring the Synthiam community forums for custom solutions developed by other users.