RocketM + USB + USB relay

Hello,

I probe using Openwrt with RocketM and USB. I Installed opkg list-installed | grep usb
kmod-usb-core - 4.9.120-1
kmod-usb-ehci - 4.9.120-1
kmod-usb-ohci - 4.9.120-1
kmod-usb-storage - 4.9.120-1
kmod-usb-storage-uas - 4.9.120-1
kmod-usb2 - 4.9.120-1
libusb-1.0 - 1.0.22-1
usbutils - 007-9

, if I use lsusb I get :
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

if I connect USB relay , LED shines , but dmesg and lsusb show nothing .

If I connect usb relay to PC , I get
Bus 008 Device 007: ID 16c0:05df Van Ooijen Technische Informatica HID device except mice, keyboards, and joysticks

in dmesg:
usb 8-2: USB disconnect, device number 6
usb 8-2: new low-speed USB device number 7 using ohci-pci
usb 8-2: New USB device found, idVendor=16c0, idProduct=05df
usb 8-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 8-2: Product: USBRelay2
usb 8-2: Manufacturer: www.dcttech.com
hid-generic 0003:16C0:05DF.0009: hiddev0,hidraw3: USB HID v1.01 Device USBRelay2] on usb-0000:00:13.1-2/input0

package kmod-hid-generic I have installed on Openwrt.
I have Openwrt 18.06.1

Any idea, what I make bad ?

Jan