amad3v

Are you with BTT?

Good to know. Thanks! Should I follow your comment [here](https://github.com/bigtreetech/BIGTREETECH-TFT35-V3.0/issues/120#issuecomment-791666846)?

Much appreciated Yes I'm compiling marlin

Thank you, will try it. Did you redefine USART2_TX_PIN and USART2_RX_PIN as PB10 and PB11 in the display's firmware?