example_funcs.py

#!/usr/bin/env python3

import hid
import sys
import time

VENDOR_ID = 0x19F7
PID_STEREO = 0x0050
PID_UPDATE = 0x004F


def open_hid(product_id, timeout=5):
    deadline = time.time() + timeout
    while time.time() < deadline:
        devs = hid.enumerate(vendor_id=VENDOR_ID, product_id=product_id)
        devs = [d for d in devs if d["usage_page"] in (0xFF00, 0)]
        if devs:
            h = hid.device()
            h.open_path(devs[0]["path"])
            h.set_nonblocking(True)
            return h
        time.sleep(0.5)
    return None


def send_cmd(dev, cmd_byte):
    report = bytes([0x01, cmd_byte]) + b"\x00" * 62
    dev.write(report)


def read_response(dev, timeout=5.0):
    deadline = time.time() + timeout
    while time.time() < deadline:
        data = dev.read(256)
        if data:
            return bytes(data)
        time.sleep(0.01)
    return None