How many can bus can you conect to rpi

Basic Information:

Printer Model:
MCU / Printerboard:btt gtr 1.0

Fill out above information and in all cases attach your klippy.log file. Pasting your printer.cfg is not needed
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Describe your issue:

Hi, I’m doing a 3d printer project with a tool changer, and I’m wondering if I can connect all the tools with the data transmission boards through the Can bus protocol, but I’m wondering how many boards I’m going to be able to connect to the rpi since it only has 4 usb and one of them is occupied by the printer control board, that is, I have 3 ports left, can I use a usb hub and what would be the limit of devices that I could connect and configure in the Klippers interface ?

You only need a single USB to CAN adapter. All the toolboards would connect to that single device.

ooo thanks, I had forgotten that I could connect them in a chain