the connection inteval cannot updated

[Jim]

Nrf52832 based on sdk14.2 development as a slave, when linked with the iPhone, pairing and binding, and then get ancs service; and Android phone connection, direct communication is not paired, the first connection interval is updated after the connection 5s, the second time Updated after 30s, it is now found that when connecting to an Android phone, the connection interval can be updated normally, but when connecting with an iPhone, the connection interval cannot be updated. What is the reason?

[Mttrinh]

Hi,

What connection parameters are you using? Can you check if your parameters are within Apple's Guidelines?

[Mttrinh]

Hi,

How do you update the connection interval? Can you send me a sniffer trace? I seems like the default interval is within the wanted range so the SDK module won't send out a conn param update request.

[Jim]

Hi，

Attached for crawled air package data.conn_params_update_fail.pcapng

[Mttrinh]

It doesn't seem like you are sending an conn param update request from the peripheral. Like I said in my previous answer, seems like the default interval is within the wanted range so the SDK module won't send out a conn param update request.