Merging of SPI code and ble_app_uart for nrf52840


I am developing weight scale with Bluetooth feature. I have already developed the code to get weight scale reading using SPI example.

Also tested ble_app_uart code individually and working fine.  Now i want to merge this code so that can send weight scale reading to nrf connect app using Bluetooth.

can you suggest me the step for how to merge both code and which file need to change?

Thank you,

Rahul Kidecha