Hi Marcel, This was already discussed a year ago: question: http://sourceforge.net/mailarchive/message.php?msg_id=8643791 reply: http://sourceforge.net/mailarchive/message.php?msg_id=8643793 I have exactly the same problem, I guess. Instead of EINPROGRESS non-blocking connect() returns EAGAIN (Resource temporarily unavailable). The rest seem to be OK (see the source). Select waits till the connection is established or an error occurs (at least as it looks from hcidump log). Regards, Victor.