Solving the USB Latency Dogma for HMI/MPG: Technical Feedback Request

Hi everyone,Following the technical progress we've discussed regarding USB latency and UDEV permissions, I’ve assembled and tested a first batch of 5 complete kits (Main board + I/O expansions).To be clear on the project structure:

• The LinuxCNC HAL Component is fully Open Source on GitHub (GPLv2).
• The Firmware and PCB Schematics are proprietary and come pre-installed/ready-to-use in these hardware kits.

This is a 'ready-to-go' solution for those who want to implement this HMI/MPG interface without building the hardware or coding the firmware side themselves.eBay Link (5 units available): www.ebay.it/itm/277867309687 Looking forward to your feedback on these first units!

I understand this currently comes with 8 digital inputs and 8 digital outputs, besides the analog I/O. If I later wanted to add additional inputs, would it be just a simple matter of stacking on additional input cards and updating my linuxcnc config, or would additional changes be needed?

The system accepts 128 digital inputs and 128 digital outputs by simply adding the expansion card on the desired side and updating the loadrt command in the .hal file with the number of expansion inputs/outputs installed. Expansion cards work on either side.