ok, I use B-L072Z, I had seen the pin configuration for usart2 but when modifying the pins and functions so that they remain in usart1 on pin 9a and 10a, when uploading the program to the card the com port leaves to transmit data, I don't know what I...

Can you tell me what files I must change to have the communication?:grinning_face_with_sweat:

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