This method retrieves a pin state report for the specified pin

        :param pin: Pin of interest

        :param cb: optional callback reference

        :returns: pin state report

def get_pin_state(self, pin, cb=None):
        """
        This method retrieves a pin state report for the specified pin

        :param pin: Pin of interest

        :param cb: optional callback reference

        :returns: pin state report
        """
        task = asyncio.ensure_future(self.core.get_pin_state(pin))
        report = self.loop.run_until_complete(task)

        if cb:
            cb(report)
        else:
            return report