How to increase the KW45 Bluetooth MTU data size

[Taiyi]

Hello!

       We need to transfer more than 23 bytes of data in the Bluetooth slave notification data, please change how to set and modify the code. I have tried the current transfer maximum actual support of 23 bytes   I look forward to hearing from you all. Thank you very much!

[EduardoZamora]

Hello @Taiyi

Hope you are doing well.

Could you please help us with some additional details about your application? What is its purpose?

What SDK version are using as base for your development?

Please, take a look at the BLE Application Developer's Guide (this document can be found inside the KW45 SDK > docs > wireless > Bluetooth). Chapter 5 Generic Attribute Profile (GATT) Layer, Section 5.1 Client APIs provide some procedures and APIs to configure ATT MTU, discover Services and Characteristics, and initiate data exchanges.  Also, Section 5.2 MTU exchange describes the ATT packet, its default size, exchange procedure.

Regards,
Eduardo.