It may be tricky to get one-wire devices to work with OSPi (I’ve seen reports of this previously) — the main issue is that the hardware one-wire pin happens to be a GPIO pin that OSPi uses to send signals to the shift register. I am not sure if there is a way to swap the one-wire pin to a different pin. It’s certainly possible to swap the shift register pin to use a different one, but that requires minor hardware and software changes.