Connection interval calculation for Min/Max Connection interval

[jayesh]

Seeing the Log on wireshark for Central and peripheral communication after connection.

Here i am bit confused that when Connection update request is send by Slave after connection i:e 5sec here salve is sending Min and Max Connection interval parameters.

Here MIN_CONN = 15msec and MAX_CONN = 40msec

Based on that request master is sending LL_CONNECTION_UPDATE_REQ here i can see Connection Interval = 30msec

So here is there any formula to calculate Connection interval time form Min/Max connection interval time. I am attaching Wireshark log filePheripheral_Connected_Central_log.pcapng

[Stefan Birnir Sverrisson]

Hi

If the slave device sends connection update request MIN_CONN = 15ms and MAX_CONN = 40ms, that means the master has freedom to choose connection interval between 15ms and 40ms. So 30ms is normal.

[jayesh]

Thanks Stefan for comment......