Aeotec Z-Stick not showing up in /dev/ (RBPi 4 Model B)

[Z0eff]

There's not even so much as a peep from the syslog either. Tried all 4 USB ports on the RBPi. From what I understand, it should show up as /dev/ttyACM0 or /dev/ttyACM1 if there's such a device already, but there's nothing. However, the LED does light up and does it's Yellow-Red-Blue routine which from what I'm reading is normal. It's getting power from the USB port at least.

I've plugged it into a windows machine to see if it's detected there, and it immediately gets assigned a COM port in the Device Manager, so it does seem to work. Plugging in a random USB memory stick into the Raspberry Pi 4 shows up immediately and makes syslog spit out information about it, so the USB ports are functional.

Does anybody have any idea what might be the issue here?

Here's a screenshot of the output of some commands while both the Aeotec Z-Stick and USB memory sticks are inserted:

USB_Devices_list_with_USBstorage_and_Z-Stick_plugged_in.png (138.3 KiB) Viewed 4505 times

Here is it showing up fine in Windows:

Z-Stick_showing_up_in_Windows.png (4.27 KiB) Viewed 4505 times

[kendaop]

I'm having this issue too. The Z-Stick works fine on my RPi3.

[hosereh]

I had the same issue - until I plugged the stick into the USB ports directly next to the ethernet jack.

[jamesh]

Please read this issue for details on this non-compliant device.

https://github.com/raspberrypi/linux/issues/3027

[mattiasPie]

Hi

I have the exact same problem. However mine was working for a week until I rebooted my PI yesterday and I have been unable to get it working since.
Strange that it was working for a while and then stoped.
As a workaround I have ordered a USB hub from Amazon with 5-7 days shipping.

[tunish]

Hi,
Any news for this. Is there going to be any fix for this issue with Rpi4b model?
It works correctly with 3b+..

[rpdom]

Hi,
Any news for this. Is there going to be any fix for this issue with Rpi4b model?
It works correctly with 3b+..

Did you read the comments on the link that jamesh posted?
That is where you will see any updates.

[jamesh]

Hi,
Any news for this. Is there going to be any fix for this issue with Rpi4b model?
It works correctly with 3b+..

No, this is a problem with the wave not adhering to the USB electrical standard, not the pi4 usb controller.

Pi3 uses a different controller.