def is_alive_device(device_path):
    dev_props = fetch_property(device_path, IFACE_DEVICE)

    if dev_props is None:
        return False

    rssi = dev_props.get("RSSI", None)
    if rssi:
        return True
    else:
        return False
    return False

while True:

        if is_connected_device(dev_path) is True:
            LOG.info("already connected {}".format(dev_path))
            continue

        if not is_alive_device(dev_path):
            LOG.info("can't find device near side: {}".format(dev_path))
            continue

        device_connect(dev_path, profile_key)