I was waiting for their v2 of hardware that were never launched, RoomMe allows you to have room presence by tracking BT iPhones, Google it and see if this suites you, it has a C4 driver as well, this is my only recommendation, another way which is more complex, again is to use BT gateway with HA then Import these sensors to C4 with the C4 to HA driver I pointed out earlier in this post, nothing else will work!