How does the global printf() know where to send the output?

[JohnnyK (Jan Kamidra)]

Hello,
I know about two options…

First:
Pins for default STDIO are defined here and can be overridden in mbed_app.json like this.

Second:

Remaping printf on custom boards in Mbed 6

Hello Kyle, I don’t know whether this is the “correct” way to do it but you can try the mbed_override_console hook: /** Applications may implement this to change stdin, stdout, stderr. * * This hook gives the application a chance to specify a custom FileHandle * for the console. ... */ FileHandle *mbed_override_console(int fd); For example, to remap printf to an USART port available on pins D0, D1: #include "mbed.h" ... FileHandle *mbed::mbed_override_console(int) { static Buffered…

BR, Jan