advertising time interval

RE: advertising time interval

schef — Wed, 12 Apr 2017 09:11:56 GMT

Here is a picture example with 500ms adv interval.

RE: advertising time interval

Jebakumar — Wed, 29 Mar 2017 09:17:34 GMT

SD transmits advertising packet in all 3 advertising channels on every advertising interval. For 40ms advertising interval, there should be maximum of (1 / 0.04) * 3 = 75 advertising packets. But the advertising intervals are perturbed in time using the delay called advDelay (a pseudo-random value with a range of 0 ms to 10 ms generated by the Link Layer for each advertising event). It will further reduce the advertising packet count per second. Please refer this link devzone.nordicsemi.com/.../.

RE: advertising time interval

Jeong Hyun Seok — Sun, 26 Feb 2017 06:19:57 GMT

Let me show you general ADV sequence

send ADV via 37 channel (and small interval)
send ADV via 38 channel (and small interval)
send ADV via 39 channel
then, interval 40 ms
repeat 1)2)3)4

so they will send under 75 packets per second.

in my device, send ADV takes about 272 us and small interval of 665 us

so 1)2)3) spends around 2ms. total 1)2)3)4 = 42 ms

RE: advertising time interval

Sigurd — Mon, 02 Jan 2017 12:43:53 GMT

Could you save and upload the Wireshark trace/log?