On 01/29/2016 12:24 PM, Gabriele Filosofi wrote: d) A sequence number in each message. How could I effectively exploit such a feature ? -- Richard A. Smith smith@whoop.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com If you can have out of order messages and need re-assembly then you use the sequence number. In some fully asynchronous protocols I've done there are multiple commands outstanding the sequence number is used to link the command response back to the original command. But the main use for me has been while doing protocol debugging. Gaps in the sequence numbers indicate bad things.