How to request updating connection parameter from peripheral role?

[Jeffery]

Hi

Q1.

At SDK, peripheral can request connection parameter update to central, such as PHY, connection interval and MTU size.

At SDK Connect (v1.8.0) throughput sample, all the update was begun from central.

Could we request these updates from peripheral side at SDK Connect?

Q2.

At sdk connect, what is different between connection interval and TX/RX payload interval?

Thanks.

Jeffery

[Priyanka]

Hi Jeffery,

Q1. It should be possible to request updates from peripheral side in nRF Connect SDK, but I am not sure of the samples. I can check internally and get back to you regarding this. 

Q2. The connection interval, as mentioned in the documentation, "defines how often the devices must listen on the radio", i.e. the more the connection interval, the devices will listen for a longer period during transmission and hence more packets can be transmitted. But, TX/RX payload interval means the interval between the payload(data) transmission and receiving.

Regards,

Priyanka

[Priyanka]

Hi Jeffery,

You can use the same functions for changing the connection parameters, on the peripheral side as well.

And also, I wanted to rectify a mistake in my explanation of connection interval. The connection interval "defines how often the devices must listen on the radio", i.e. it defines the interval of silence in between the transmission. So for eg, if the connection interval is 7.5ms, the devices turn on their radio and talk after every 7.5ms and have their radio turned off rest of the time.

Sorry for the confusion.

Regards,

Priyanka