Send a packet with a position to one anchor.
        :param anchor_id: The id of the targeted anchor. This is the first byte
        of the anchor address.
        :param position: The position of the anchor, as an array

def set_position(self, anchor_id, position):
        """
        Send a packet with a position to one anchor.
        :param anchor_id: The id of the targeted anchor. This is the first byte
        of the anchor address.
        :param position: The position of the anchor, as an array
        """
        x = position[0]
        y = position[1]
        z = position[2]
        data = struct.pack('<Bfff', LoPoAnchor.LPP_TYPE_POSITION, x, y, z)

        self.crazyflie.loc.send_short_lpp_packet(anchor_id, data)