If I want my phone to send faster (Android, IOS)

[tony55723]

Hello,

I used SDK15.3

Android phone and iOS phone is master

nRF52811 module is slave 

It's said that the phone can't set conn international（Android、iOS）

But slave can recommend the master

1.What settings do I need to make on the module to recommend the master?

2.How does the mobile phone know whether to allow or refuse?

Thanks

[Karl Ylvisaker]

Hello,

1.What settings do I need to make on the module to recommend the master?

The peripheral can request a connection parameter update, please see this sequence diagram to see how this might transpire. 

2.How does the mobile phone know whether to allow or refuse?

This depends on what connection parameters your phone and application supports. I know that some OS's does not yet permit connection intervals lower than 15 ms, for example. In this case, your application will not be able to override this.
In general, you will have to configure the phone application to accept the parameters requested by the peripheral. How you do this will be different between iOS and Android.

Best regards,
Karl 

[tony55723]

Thank you for your reply

I would like to ask, as far as you know, which mobile phones can support faster connection interval?

Whether it's iOS or Android, I want to know, thank you

[Karl Ylvisaker]

tony55723 said:

Thank you for your reply

No problem at all, I am happy to help!

tony55723 said:

Whether it's iOS or Android, I want to know, thank you

A brief search for this reveals that it seems iOS devices supports >= 15 ms connection intervals, it also seems to me that Android OS does not limit the connection interval directly(you can have it as low as 7.5 ms), although you do not set the connection interval explicitly so there are only a handful of preconfigured options available.
Take this information with a pinch of salt though, since I am neither a iOS nor Android OS developer.

Best regards,
Karl