It means you need to add a GATT connection ? This is not supported right now.The reason is that the BLE connection is managed by BLE-Mesh firmware. You can however, use UART interface to make connection to the PC.

Please use IAR Embedded Workbench for ARM (EWARM) toolchain V8.40.1 as mentioned in release notes of the firmware

Hello,There is already Serial interface available in BLE-Mesh project. You can look at /* Enables the serial interface using Uart */#define ENABLE_SERIAL_INTERFACE           0#define ENABLE_SERIAL_CONTROL             0

Please look at designs based on module, for example X-NUCLEO-IDB05A1.Using a module can be faster and easier to make the design work