Redirect printf and Console to custom function

[elektron314]

Can I redirect/reroute printf functions and also all console messages to my own written functions? What exactly I need is to route them to my own software uart that I have written by myself. Why? 3 HW UARTS are very busy already doing their job and we need one more SW UART for getting messages from the processor.

[username]

Search the forum, this has been asked a few times in the past.

[elektron314]

Search the forum, this has been asked a few times in the past.

Already done. I have found different solutions but not redirecting to SW UART or my own custom function.

[elektron314]

But does anybody know how to exactly redirect printf to my own function?

[chegewara]

https://docs.espressif.com/projects/esp ... ntf_like_t
https://docs.espressif.com/projects/esp ... ng-to-host

espressif examples:
https://github.com/espressif/esp-idf/bl ... #L108-L116

https://github.com/espressif/esp-idf/bl ... _log.c#L76

[kohait00]

quite some information provided here, but..

this is not for the real printf, which goes over vfs console file descriptors
this is all is for the ESP_LOGx facility..

hence again, the question:
is there an easy way to override the destination for printf (whatever is defined in sdkconfig) to, say, log in a buffer ?
I mean without messing with the vfs or trying to redirect or sth like that..
Any help is appreciated