iPhone indicate [peer failed to respond to ATT value indication]

[Shi_Jim]

hi,

Using nRF52840 , Softdevice S340, gcc 

After my device is successfully paired with iphone (iOS15), after I upgrade my iphone to iOS16, the device cannot connect to iphone through Bluetooth. An error message [peer failed to respond to ATT value indication] is displayed. How can I solve this problem?

thanks~

[Kenneth]

Hello,

I am not aware of any issues no, I suggest to get an on-air sniffer log so I can take a look:
https://www.nordicsemi.com/Products/Development-tools/nrf-sniffer-for-bluetooth-le 
https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html 

Best regards,
Kenneth

[Shi_Jim]

[Kenneth]

A sniffer log would help, but based on the issue is related to value indication I assume the following two message sequence charts are related:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s340.api.v6.1.1%2Fgroup___b_l_e___g_a_t_t_s___h_v_i___m_s_c.html 
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s340.api.v6.1.1%2Fgroup___b_l_e___g_a_t_t_c___h_v_i___m_s_c.html 

Kenneth

[Shi_Jim]

thanks~

[netdigger]

Did you get anywhere on this issue? We're seeing it as well, and it is so hard to reproduce since you have to upgrade from iOS 15 to iOS 16 to trigger it

[Kenneth]

A sniffer log of working with ios15 vs working/failing with ios16 would be helpful to at least narrow down the cause, but if I were to guess it may be related to some issues of handling of system attributes (e.g. retaining cccd values with handles) when iOS is updating, I think it's little that can be done in situations like this other than rebond. But an on-air sniffer log would as mention be helpful to narrow it down.

Kenneth