Flashing Nucleo-L073rz using the system bootloader.

Take photo of your UART to USB and your board connection ​

Hi, Algorithm of bootloader connection listens for signals. When you are trying to connect using 9600 then the board calibrate yourself and customize yours settings to 9600. If you disconnect, change baudrate and reconnect you get error because the board expect 9600. First you must reset board (using reset button for example) then change baudrate. The same with UART port. first reset then try connect with new settings.

In case of USART2. look at board manual:

https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf

try using CN3 connector:

Did you resolve the issue?

@ABans.3​ ​

@Kamil Duljas​ Thanks for your support. I appreciate that!

I use esp32 instead for the regular ftdi, it works for 115200 baud rate.

for Uart2 I need to verify it. I was busy in developing my app.

Thanks again for supporting me.