Can't find messages from APPL_LOG("string")

[erltot]

I am going through the BLE Central tutorial and am a bit confused by the APPL_LOG function calls, from what I could understand it should give messages on serial port, like printf does, but i am not seeing any messages..

Where am I suppose to see them? I think I missed something fundamental here?

Edit: Where to put the defines

[tyler]

Also using NFF_LOG_FLUSH() produces the following error: implicit declaration of function 'NRF_LOG_FLUSH'

[erltot]

It may not be necessary to upgrade, so perhaps you could get away with a simple "#define APPL_LOG printf"