USB device shown in lsusb but not appearing in /dev/tty

This device works fine on windows, while on Ubuntu 16.04 I can see it only in the connected devices list but no /dev/tty* ports are instantiated, making it impossible to access it.

The lsusb -v output regarding that device is the following:

Bus 003 Device 005: ID 0483:5750 STMicroelectronics
Couldn't open device, some information will be missing
Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0483 STMicroelectronics idProduct 0x5750 bcdDevice 2.01 iManufacturer 1 iProduct 2 iSerial 3 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 41 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 300mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.10 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 33 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 2 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 2

Is there any way to associate it to a usb port?

EDIT: The mentioned device is a programmable servo controller. I should send commands to it through serial communication, that's why I would like to have it mapped on a /dev/tty*-like port.

EDIT #2: I have added the rule in udev, still I can't access the device properly. Here I provide the related output from the /var/log/syslog:

Jan 30 13:10:02 cr055 kernel: [ 615.391231] usb 3-1: new full-speed USB device number 10 using xhci_hcd
Jan 30 13:10:03 cr055 kernel: [ 615.540602] usb 3-1: New USB device found, idVendor=0483, idProduct=5750
Jan 30 13:10:03 cr055 kernel: [ 615.540605] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 30 13:10:03 cr055 kernel: [ 615.540607] usb 3-1: Product: LOBOT
Jan 30 13:10:03 cr055 kernel: [ 615.540609] usb 3-1: Manufacturer: MyUSB_HID
Jan 30 13:10:03 cr055 kernel: [ 615.540610] usb 3-1: SerialNumber: 498F248E3033
Jan 30 13:10:03 cr055 kernel: [ 615.541725] hid-generic 0003:0483:5750.0003: hiddev0,hidraw0: USB HID v1.10 Device [MyUSB_HID LOBOT] on usb-0000:00:14.0-1/input0
Jan 30 13:10:03 cr055 mtp-probe: checking bus 3, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
Jan 30 13:10:03 cr055 mtp-probe: bus: 3, device: 10 was not an MTP device

1 Answer

You modify UDEV info to assign a tty to the device when it is plugged in. Something similar to the below might be appropriate

SUBSYSTEM=="tty", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="483", ATTRS{serial}=="00492F60", SYMLINK+="ttyS99"

You would add this to a file (which starts with a number- and ends .rules) in /etc/udev/rules.d - eg /etc/cudev/rules.d/20-microontroller.rules

You would then need to restart udev.

BTW, its generally a good idea to provide the log output generated in /var/log/messages or /var/log/syslog when you plug a device in.