No communications link available to VEX device. Check that your device is connected to the PC.”

Hi. I’m trying to help out at my sons school. They recently got all new laptops and they only have USB C. They are using a little adaptor to go from USB A to C. The teacher says any time he tries to download to the microcontroller he gets this message.

No communications link available to VEX device. Check that your device is connected to the PC.

Will these work with adaptors? Also the new laptops are Windows 11. Does the software and hardware work with 11? I found another post where it said to get new firmware and i’m not able to find that firmware anywhere.

Help.

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more information is needed. The cortex is not supported by VEXcode, so assume they are using older programming software, what would that be ? RobotC, EasyC, something else ? I can’t say I’ve ever used an old cortex via a USB C to A adapter. There’s a chance that the old software is not compatible with Windows 11 or USB C ports, the last release of RobotC was over 6 years ago.

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They are using Robot C. It installed for them and the software runs fine except when trying to communicate. I was going to have my son bring one of the units home and try on a WIndows 11 machine with USB A ports. I figured if that works then it must be the conversion to USB C.

Check device manager and see if the cortex shows up under ports.

The cortex is pushing 14 years old at this point (since first sold) and has a slightly non-standard USB implementation, Windows 11 may have finally broken that, hard to say. You could also try a USB C hub that has USB A ports (rather than just an adapter cable) and see if that works.

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