NRF52 virtual com port over bluetooth

I need to make something like this and need that baudrate which are configurated in smartphone BLE app that this value be and on NRF528XX uart baudrate.

For example when I transmit from smartphone "Hello world" via bluetooth on 115200 baud rate that the nrf528XX transmit "Hello world" on his uart with the same baudrate.

Any help will be very usefull. Thank you.