nrf5 SDK 14.2.0 cannot be connected by ios

[weizhen]

hi, I am updating the sdk from 12.2.0 to 14.2.0, and using softdevice s132. I get a problem by connecting device using ios devices, but it works fine with android device. do you know what should I do? 

[Mttrinh]

Hi,

What are you using to connect to your device? nRF Connect? nRF Toolbox? Any error codes?

Did it work with SDK12.2.0 before you migrated to SDK14.2.0?

[Mttrinh]

Did you follow the migration guides? Guide for migration: from SDK12.2.0 to SDK13.0.0, and from SDK13.0.0 to SDK14.0.0.

[Mttrinh]

Have you tried testing with different iOS device? iPhones? iPad? Also tried with different iOS versions?

I can't see anything wrong with your code, have you tried increasing/decreasing the connection interval?

[weizhen]

yes, I tried different ios device and tried  increasing/decreasing the connection interval, but none of it works

[weizhen]

could sdk_config cause some issue?

[weizhen]

I found when I got the same problem in SDK 12.2.0, it require me to set the mtu things and make it works. but in sdk 14.2.0, I cannot find any mtu settings examples. do you know what kind of settings do I need to do?

[emdi]

You'll need to handle ATT MTU and Data Length negotiation.

There is a library in the SDK to facilitate that, called nrf_ble_gatt, it is used in ble_app_hrs.

[weizhen]

I tried that, but it still not works for me. also the example ble_app_multiperipheral do not set ATT MTU, but that works fine.