#! /usr/bin/env python3
import usb.core
import time
dev = usb.core.find(idVendor=0x0925, idProduct=0xD100)
if dev is None:
raise ValueError('Device not found')
res = dev.ctrl_transfer(
bmRequestType=0x40, # OUT, VENDOR, DEVICE request
bRequest=1, # Request #1
wValue=0xCAFE,
wIndex=0xD00D,
data_or_wLength=[0x01, 0x23, 0x45, 0x67])