Advertising interval

[Freddy Sørensen]

Is the advertising interval between two packets P1 and P2 defined as:

Interval = P2_start - P1_stop (time between packets)

or

Interval = P2_start - P1_start (time from start to start)

Kind regards Freddy

[RK]

Section 4.4.2.2 BTLE Spec volume 6 (and a few afterwards) has the details on that.

For undirected advertising the interval is Start -> Start between advertising events. An advertising event usually does, but may not, consist of advertising packets on all of the 3 advertising channels, each <10mS Start to Start of the individual packets inside the event.

The time between the starts of those advertising events is the advertising interval plus a random delay of up to 10ms to avoid the situation two advertisers get in, and stay in, sync.

[Freddy Sørensen]

Thanks RK,

This explains why my interval variations. I was afraid it could be some kind of a interrupt priority problem.

/Freddy