I cut the ST-LINK part, but there is no printf output on the serial monitor.

[최민혁.1]

Hello?

I am a developer using the nucleo-f411re board.

I had a problem while trying to update the firmware by cutting the st-link part. The firmware is uploaded successfully, but the result of the printf function is not printed on the serial monitor.

Is there any other rule that says I have to remove sb or connect another line?

I connected the debugging port by referring to the link below.

https://community.openenergymonitor.org/t/stm32-hardware-development/7135/20

[Tesla DeLorean]

The UART doesn't connect via the SWD pins.​

RX and TX​ should be exposed on a second pair of pins.

[Nikita91]

You have to connect the MCU UART pins to the CN3 connector of the st-link part.