nrf 52840 from nrf 52833

    i am doing a code on mesh networking with nrf 52 boards I developed the code and it is working for the nrf52840 and now I wanted to change it for nrf52840 I changed by that in segger. code compiled with out any errors but I did not get any data in putty while deploying and running the board I want to you to check the code in the git hub link provided below 
please reply this as soon as possible
or is there a way just to change the linker and preprosession what should I keep in the memory segments file